--- /dev/null
+From 06a0df4d1b8b13b551668e47b11fd7629033b7df Mon Sep 17 00:00:00 2001
+From: Linus Torvalds <torvalds@linux-foundation.org>
+Date: Tue, 8 Sep 2020 10:56:27 -0700
+Subject: fbcon: remove now unusued 'softback_lines' cursor() argument
+
+From: Linus Torvalds <torvalds@linux-foundation.org>
+
+commit 06a0df4d1b8b13b551668e47b11fd7629033b7df upstream.
+
+Since the softscroll code got removed, this argument is always zero and
+makes no sense any more.
+
+Tested-by: Yuan Ming <yuanmingbuaa@gmail.com>
+Tested-by: Willy Tarreau <w@1wt.eu>
+Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/video/console/bitblit.c | 11 +----------
+ drivers/video/console/fbcon.c | 4 ++--
+ drivers/video/console/fbcon.h | 2 +-
+ drivers/video/console/fbcon_ccw.c | 11 +----------
+ drivers/video/console/fbcon_cw.c | 11 +----------
+ drivers/video/console/fbcon_ud.c | 11 +----------
+ drivers/video/console/tileblit.c | 2 +-
+ 7 files changed, 8 insertions(+), 44 deletions(-)
+
+--- a/drivers/video/console/bitblit.c
++++ b/drivers/video/console/bitblit.c
+@@ -234,7 +234,7 @@ static void bit_clear_margins(struct vc_
+ }
+
+ static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg)
++ int fg, int bg)
+ {
+ struct fb_cursor cursor;
+ struct fbcon_ops *ops = info->fbcon_par;
+@@ -247,15 +247,6 @@ static void bit_cursor(struct vc_data *v
+
+ cursor.set = 0;
+
+- if (softback_lines) {
+- if (y + softback_lines >= vc->vc_rows) {
+- mode = CM_ERASE;
+- ops->cursor_flash = 0;
+- return;
+- } else
+- y += softback_lines;
+- }
+-
+ c = scr_readw((u16 *) vc->vc_pos);
+ attribute = get_attribute(info, c);
+ src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
+--- a/drivers/video/console/fbcon.c
++++ b/drivers/video/console/fbcon.c
+@@ -370,7 +370,7 @@ static void fb_flashcursor(struct work_s
+ c = scr_readw((u16 *) vc->vc_pos);
+ mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
+ CM_ERASE : CM_DRAW;
+- ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
++ ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ console_unlock();
+ }
+@@ -1270,7 +1270,7 @@ static void fbcon_cursor(struct vc_data
+
+ ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
+
+- ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
++ ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ }
+
+--- a/drivers/video/console/fbcon.h
++++ b/drivers/video/console/fbcon.h
+@@ -62,7 +62,7 @@ struct fbcon_ops {
+ void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
+ int bottom_only);
+ void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg);
++ int fg, int bg);
+ int (*update_start)(struct fb_info *info);
+ int (*rotate_font)(struct fb_info *info, struct vc_data *vc);
+ struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */
+--- a/drivers/video/console/fbcon_ccw.c
++++ b/drivers/video/console/fbcon_ccw.c
+@@ -219,7 +219,7 @@ static void ccw_clear_margins(struct vc_
+ }
+
+ static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg)
++ int fg, int bg)
+ {
+ struct fb_cursor cursor;
+ struct fbcon_ops *ops = info->fbcon_par;
+@@ -236,15 +236,6 @@ static void ccw_cursor(struct vc_data *v
+
+ cursor.set = 0;
+
+- if (softback_lines) {
+- if (y + softback_lines >= vc->vc_rows) {
+- mode = CM_ERASE;
+- ops->cursor_flash = 0;
+- return;
+- } else
+- y += softback_lines;
+- }
+-
+ c = scr_readw((u16 *) vc->vc_pos);
+ attribute = get_attribute(info, c);
+ src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
+--- a/drivers/video/console/fbcon_cw.c
++++ b/drivers/video/console/fbcon_cw.c
+@@ -202,7 +202,7 @@ static void cw_clear_margins(struct vc_d
+ }
+
+ static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg)
++ int fg, int bg)
+ {
+ struct fb_cursor cursor;
+ struct fbcon_ops *ops = info->fbcon_par;
+@@ -219,15 +219,6 @@ static void cw_cursor(struct vc_data *vc
+
+ cursor.set = 0;
+
+- if (softback_lines) {
+- if (y + softback_lines >= vc->vc_rows) {
+- mode = CM_ERASE;
+- ops->cursor_flash = 0;
+- return;
+- } else
+- y += softback_lines;
+- }
+-
+ c = scr_readw((u16 *) vc->vc_pos);
+ attribute = get_attribute(info, c);
+ src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
+--- a/drivers/video/console/fbcon_ud.c
++++ b/drivers/video/console/fbcon_ud.c
+@@ -249,7 +249,7 @@ static void ud_clear_margins(struct vc_d
+ }
+
+ static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg)
++ int fg, int bg)
+ {
+ struct fb_cursor cursor;
+ struct fbcon_ops *ops = info->fbcon_par;
+@@ -267,15 +267,6 @@ static void ud_cursor(struct vc_data *vc
+
+ cursor.set = 0;
+
+- if (softback_lines) {
+- if (y + softback_lines >= vc->vc_rows) {
+- mode = CM_ERASE;
+- ops->cursor_flash = 0;
+- return;
+- } else
+- y += softback_lines;
+- }
+-
+ c = scr_readw((u16 *) vc->vc_pos);
+ attribute = get_attribute(info, c);
+ src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
+--- a/drivers/video/console/tileblit.c
++++ b/drivers/video/console/tileblit.c
+@@ -80,7 +80,7 @@ static void tile_clear_margins(struct vc
+ }
+
+ static void tile_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+- int softback_lines, int fg, int bg)
++ int fg, int bg)
+ {
+ struct fb_tilecursor cursor;
+ int use_sw = (vc->vc_cursor_type & 0x10);
--- /dev/null
+From 50145474f6ef4a9c19205b173da6264a644c7489 Mon Sep 17 00:00:00 2001
+From: Linus Torvalds <torvalds@linux-foundation.org>
+Date: Mon, 7 Sep 2020 11:45:27 -0700
+Subject: fbcon: remove soft scrollback code
+
+From: Linus Torvalds <torvalds@linux-foundation.org>
+
+commit 50145474f6ef4a9c19205b173da6264a644c7489 upstream.
+
+This (and the VGA soft scrollback) turns out to have various nasty small
+special cases that nobody really is willing to fight. The soft
+scrollback code was really useful a few decades ago when you typically
+used the console interactively as the main way to interact with the
+machine, but that just isn't the case any more.
+
+So it's not worth dragging along.
+
+Tested-by: Yuan Ming <yuanmingbuaa@gmail.com>
+Tested-by: Willy Tarreau <w@1wt.eu>
+Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
+Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/video/console/fbcon.c | 336 ------------------------------------------
+ 1 file changed, 4 insertions(+), 332 deletions(-)
+
+--- a/drivers/video/console/fbcon.c
++++ b/drivers/video/console/fbcon.c
+@@ -101,12 +101,6 @@ static int logo_lines;
+ /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
+ enums. */
+ static int logo_shown = FBCON_LOGO_CANSHOW;
+-/* Software scrollback */
+-static int fbcon_softback_size = 32768;
+-static unsigned long softback_buf, softback_curr;
+-static unsigned long softback_in;
+-static unsigned long softback_top, softback_end;
+-static int softback_lines;
+ /* console mappings */
+ static int first_fb_vc;
+ static int last_fb_vc = MAX_NR_CONSOLES - 1;
+@@ -140,8 +134,6 @@ static int fbcon_has_sysfs;
+
+ static const struct consw fb_con;
+
+-#define CM_SOFTBACK (8)
+-
+ #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
+
+ static int fbcon_set_origin(struct vc_data *);
+@@ -171,7 +163,6 @@ static void fbcon_bmove(struct vc_data *
+ static int fbcon_switch(struct vc_data *vc);
+ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
+ static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
+-static int fbcon_scrolldelta(struct vc_data *vc, int lines);
+
+ /*
+ * Internal routines
+@@ -350,18 +341,6 @@ static int get_color(struct vc_data *vc,
+ return color;
+ }
+
+-static void fbcon_update_softback(struct vc_data *vc)
+-{
+- int l = fbcon_softback_size / vc->vc_size_row;
+-
+- if (l > 5)
+- softback_end = softback_buf + l * vc->vc_size_row;
+- else
+- /* Smaller scrollback makes no sense, and 0 would screw
+- the operation totally */
+- softback_top = 0;
+-}
+-
+ static void fb_flashcursor(struct work_struct *work)
+ {
+ struct fb_info *info = container_of(work, struct fb_info, queue);
+@@ -391,7 +370,7 @@ static void fb_flashcursor(struct work_s
+ c = scr_readw((u16 *) vc->vc_pos);
+ mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
+ CM_ERASE : CM_DRAW;
+- ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
++ ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ console_unlock();
+ }
+@@ -451,13 +430,7 @@ static int __init fb_console_setup(char
+ }
+
+ if (!strncmp(options, "scrollback:", 11)) {
+- options += 11;
+- if (*options) {
+- fbcon_softback_size = simple_strtoul(options, &options, 0);
+- if (*options == 'k' || *options == 'K') {
+- fbcon_softback_size *= 1024;
+- }
+- }
++ pr_warn("Ignoring scrollback size option\n");
+ continue;
+ }
+
+@@ -962,31 +935,6 @@ static const char *fbcon_startup(void)
+ p->con_rotate = initial_rotation;
+ set_blitting_type(vc, info);
+
+- if (info->fix.type != FB_TYPE_TEXT) {
+- if (fbcon_softback_size) {
+- if (!softback_buf) {
+- softback_buf =
+- (unsigned long)
+- kmalloc(fbcon_softback_size,
+- GFP_KERNEL);
+- if (!softback_buf) {
+- fbcon_softback_size = 0;
+- softback_top = 0;
+- }
+- }
+- } else {
+- if (softback_buf) {
+- kfree((void *) softback_buf);
+- softback_buf = 0;
+- softback_top = 0;
+- }
+- }
+- if (softback_buf)
+- softback_in = softback_top = softback_curr =
+- softback_buf;
+- softback_lines = 0;
+- }
+-
+ /* Setup default font */
+ if (!p->fontdata && !vc->vc_font.data) {
+ if (!fontname[0] || !(font = find_font(fontname)))
+@@ -1149,9 +1097,6 @@ static void fbcon_init(struct vc_data *v
+ if (logo)
+ fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
+
+- if (vc == svc && softback_buf)
+- fbcon_update_softback(vc);
+-
+ if (ops->rotate_font && ops->rotate_font(info, vc)) {
+ ops->rotate = FB_ROTATE_UR;
+ set_blitting_type(vc, info);
+@@ -1311,7 +1256,6 @@ static void fbcon_cursor(struct vc_data
+ {
+ struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+ struct fbcon_ops *ops = info->fbcon_par;
+- int y;
+ int c = scr_readw((u16 *) vc->vc_pos);
+
+ ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
+@@ -1325,16 +1269,8 @@ static void fbcon_cursor(struct vc_data
+ fbcon_add_cursor_timer(info);
+
+ ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
+- if (mode & CM_SOFTBACK) {
+- mode &= ~CM_SOFTBACK;
+- y = softback_lines;
+- } else {
+- if (softback_lines)
+- fbcon_set_origin(vc);
+- y = 0;
+- }
+
+- ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
++ ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ }
+
+@@ -1405,8 +1341,6 @@ static void fbcon_set_disp(struct fb_inf
+
+ if (CON_IS_VISIBLE(vc)) {
+ update_screen(vc);
+- if (softback_buf)
+- fbcon_update_softback(vc);
+ }
+ }
+
+@@ -1544,99 +1478,6 @@ static __inline__ void ypan_down_redraw(
+ scrollback_current = 0;
+ }
+
+-static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
+- long delta)
+-{
+- int count = vc->vc_rows;
+- unsigned short *d, *s;
+- unsigned long n;
+- int line = 0;
+-
+- d = (u16 *) softback_curr;
+- if (d == (u16 *) softback_in)
+- d = (u16 *) vc->vc_origin;
+- n = softback_curr + delta * vc->vc_size_row;
+- softback_lines -= delta;
+- if (delta < 0) {
+- if (softback_curr < softback_top && n < softback_buf) {
+- n += softback_end - softback_buf;
+- if (n < softback_top) {
+- softback_lines -=
+- (softback_top - n) / vc->vc_size_row;
+- n = softback_top;
+- }
+- } else if (softback_curr >= softback_top
+- && n < softback_top) {
+- softback_lines -=
+- (softback_top - n) / vc->vc_size_row;
+- n = softback_top;
+- }
+- } else {
+- if (softback_curr > softback_in && n >= softback_end) {
+- n += softback_buf - softback_end;
+- if (n > softback_in) {
+- n = softback_in;
+- softback_lines = 0;
+- }
+- } else if (softback_curr <= softback_in && n > softback_in) {
+- n = softback_in;
+- softback_lines = 0;
+- }
+- }
+- if (n == softback_curr)
+- return;
+- softback_curr = n;
+- s = (u16 *) softback_curr;
+- if (s == (u16 *) softback_in)
+- s = (u16 *) vc->vc_origin;
+- while (count--) {
+- unsigned short *start;
+- unsigned short *le;
+- unsigned short c;
+- int x = 0;
+- unsigned short attr = 1;
+-
+- start = s;
+- le = advance_row(s, 1);
+- do {
+- c = scr_readw(s);
+- if (attr != (c & 0xff00)) {
+- attr = c & 0xff00;
+- if (s > start) {
+- fbcon_putcs(vc, start, s - start,
+- line, x);
+- x += s - start;
+- start = s;
+- }
+- }
+- if (c == scr_readw(d)) {
+- if (s > start) {
+- fbcon_putcs(vc, start, s - start,
+- line, x);
+- x += s - start + 1;
+- start = s + 1;
+- } else {
+- x++;
+- start++;
+- }
+- }
+- s++;
+- d++;
+- } while (s < le);
+- if (s > start)
+- fbcon_putcs(vc, start, s - start, line, x);
+- line++;
+- if (d == (u16 *) softback_end)
+- d = (u16 *) softback_buf;
+- if (d == (u16 *) softback_in)
+- d = (u16 *) vc->vc_origin;
+- if (s == (u16 *) softback_end)
+- s = (u16 *) softback_buf;
+- if (s == (u16 *) softback_in)
+- s = (u16 *) vc->vc_origin;
+- }
+-}
+-
+ static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+ int line, int count, int dy)
+ {
+@@ -1776,31 +1617,6 @@ static void fbcon_redraw(struct vc_data
+ }
+ }
+
+-static inline void fbcon_softback_note(struct vc_data *vc, int t,
+- int count)
+-{
+- unsigned short *p;
+-
+- if (vc->vc_num != fg_console)
+- return;
+- p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
+-
+- while (count) {
+- scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
+- count--;
+- p = advance_row(p, 1);
+- softback_in += vc->vc_size_row;
+- if (softback_in == softback_end)
+- softback_in = softback_buf;
+- if (softback_in == softback_top) {
+- softback_top += vc->vc_size_row;
+- if (softback_top == softback_end)
+- softback_top = softback_buf;
+- }
+- }
+- softback_curr = softback_in;
+-}
+-
+ static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
+ int count)
+ {
+@@ -1823,8 +1639,6 @@ static int fbcon_scroll(struct vc_data *
+ case SM_UP:
+ if (count > vc->vc_rows) /* Maximum realistic size */
+ count = vc->vc_rows;
+- if (softback_top)
+- fbcon_softback_note(vc, t, count);
+ if (logo_shown >= 0)
+ goto redraw_up;
+ switch (p->scrollmode) {
+@@ -2195,14 +2009,6 @@ static int fbcon_switch(struct vc_data *
+ info = registered_fb[con2fb_map[vc->vc_num]];
+ ops = info->fbcon_par;
+
+- if (softback_top) {
+- if (softback_lines)
+- fbcon_set_origin(vc);
+- softback_top = softback_curr = softback_in = softback_buf;
+- softback_lines = 0;
+- fbcon_update_softback(vc);
+- }
+-
+ if (logo_shown >= 0) {
+ struct vc_data *conp2 = vc_cons[logo_shown].d;
+
+@@ -2536,9 +2342,6 @@ static int fbcon_do_set_font(struct vc_d
+ int cnt;
+ char *old_data = NULL;
+
+- if (CON_IS_VISIBLE(vc) && softback_lines)
+- fbcon_set_origin(vc);
+-
+ resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
+ if (p->userfont)
+ old_data = vc->vc_font.data;
+@@ -2564,8 +2367,6 @@ static int fbcon_do_set_font(struct vc_d
+ cols /= w;
+ rows /= h;
+ vc_resize(vc, cols, rows);
+- if (CON_IS_VISIBLE(vc) && softback_buf)
+- fbcon_update_softback(vc);
+ } else if (CON_IS_VISIBLE(vc)
+ && vc->vc_mode == KD_TEXT) {
+ fbcon_clear_margins(vc, 0);
+@@ -2723,19 +2524,7 @@ static int fbcon_set_palette(struct vc_d
+
+ static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
+ {
+- unsigned long p;
+- int line;
+-
+- if (vc->vc_num != fg_console || !softback_lines)
+- return (u16 *) (vc->vc_origin + offset);
+- line = offset / vc->vc_size_row;
+- if (line >= softback_lines)
+- return (u16 *) (vc->vc_origin + offset -
+- softback_lines * vc->vc_size_row);
+- p = softback_curr + offset;
+- if (p >= softback_end)
+- p += softback_buf - softback_end;
+- return (u16 *) p;
++ return (u16 *) (vc->vc_origin + offset);
+ }
+
+ static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
+@@ -2749,22 +2538,7 @@ static unsigned long fbcon_getxy(struct
+
+ x = offset % vc->vc_cols;
+ y = offset / vc->vc_cols;
+- if (vc->vc_num == fg_console)
+- y += softback_lines;
+ ret = pos + (vc->vc_cols - x) * 2;
+- } else if (vc->vc_num == fg_console && softback_lines) {
+- unsigned long offset = pos - softback_curr;
+-
+- if (pos < softback_curr)
+- offset += softback_end - softback_buf;
+- offset /= 2;
+- x = offset % vc->vc_cols;
+- y = offset / vc->vc_cols;
+- ret = pos + (vc->vc_cols - x) * 2;
+- if (ret == softback_end)
+- ret = softback_buf;
+- if (ret == softback_in)
+- ret = vc->vc_origin;
+ } else {
+ /* Should not happen */
+ x = y = 0;
+@@ -2792,107 +2566,11 @@ static void fbcon_invert_region(struct v
+ a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
+ (((a) & 0x0700) << 4);
+ scr_writew(a, p++);
+- if (p == (u16 *) softback_end)
+- p = (u16 *) softback_buf;
+- if (p == (u16 *) softback_in)
+- p = (u16 *) vc->vc_origin;
+ }
+ }
+
+-static int fbcon_scrolldelta(struct vc_data *vc, int lines)
+-{
+- struct fb_info *info = registered_fb[con2fb_map[fg_console]];
+- struct fbcon_ops *ops = info->fbcon_par;
+- struct display *disp = &fb_display[fg_console];
+- int offset, limit, scrollback_old;
+-
+- if (softback_top) {
+- if (vc->vc_num != fg_console)
+- return 0;
+- if (vc->vc_mode != KD_TEXT || !lines)
+- return 0;
+- if (logo_shown >= 0) {
+- struct vc_data *conp2 = vc_cons[logo_shown].d;
+-
+- if (conp2->vc_top == logo_lines
+- && conp2->vc_bottom == conp2->vc_rows)
+- conp2->vc_top = 0;
+- if (logo_shown == vc->vc_num) {
+- unsigned long p, q;
+- int i;
+-
+- p = softback_in;
+- q = vc->vc_origin +
+- logo_lines * vc->vc_size_row;
+- for (i = 0; i < logo_lines; i++) {
+- if (p == softback_top)
+- break;
+- if (p == softback_buf)
+- p = softback_end;
+- p -= vc->vc_size_row;
+- q -= vc->vc_size_row;
+- scr_memcpyw((u16 *) q, (u16 *) p,
+- vc->vc_size_row);
+- }
+- softback_in = softback_curr = p;
+- update_region(vc, vc->vc_origin,
+- logo_lines * vc->vc_cols);
+- }
+- logo_shown = FBCON_LOGO_CANSHOW;
+- }
+- fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
+- fbcon_redraw_softback(vc, disp, lines);
+- fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
+- return 0;
+- }
+-
+- if (!scrollback_phys_max)
+- return -ENOSYS;
+-
+- scrollback_old = scrollback_current;
+- scrollback_current -= lines;
+- if (scrollback_current < 0)
+- scrollback_current = 0;
+- else if (scrollback_current > scrollback_max)
+- scrollback_current = scrollback_max;
+- if (scrollback_current == scrollback_old)
+- return 0;
+-
+- if (fbcon_is_inactive(vc, info))
+- return 0;
+-
+- fbcon_cursor(vc, CM_ERASE);
+-
+- offset = disp->yscroll - scrollback_current;
+- limit = disp->vrows;
+- switch (disp->scrollmode) {
+- case SCROLL_WRAP_MOVE:
+- info->var.vmode |= FB_VMODE_YWRAP;
+- break;
+- case SCROLL_PAN_MOVE:
+- case SCROLL_PAN_REDRAW:
+- limit -= vc->vc_rows;
+- info->var.vmode &= ~FB_VMODE_YWRAP;
+- break;
+- }
+- if (offset < 0)
+- offset += limit;
+- else if (offset >= limit)
+- offset -= limit;
+-
+- ops->var.xoffset = 0;
+- ops->var.yoffset = offset * vc->vc_font.height;
+- ops->update_start(info);
+-
+- if (!scrollback_current)
+- fbcon_cursor(vc, CM_DRAW);
+- return 0;
+-}
+-
+ static int fbcon_set_origin(struct vc_data *vc)
+ {
+- if (softback_lines)
+- fbcon_scrolldelta(vc, softback_lines);
+ return 0;
+ }
+
+@@ -2956,8 +2634,6 @@ static void fbcon_modechanged(struct fb_
+
+ fbcon_set_palette(vc, color_table);
+ update_screen(vc);
+- if (softback_buf)
+- fbcon_update_softback(vc);
+ }
+ }
+
+@@ -3378,7 +3054,6 @@ static const struct consw fb_con = {
+ .con_font_default = fbcon_set_def_font,
+ .con_font_copy = fbcon_copy_font,
+ .con_set_palette = fbcon_set_palette,
+- .con_scrolldelta = fbcon_scrolldelta,
+ .con_set_origin = fbcon_set_origin,
+ .con_invert_region = fbcon_invert_region,
+ .con_screen_pos = fbcon_screen_pos,
+@@ -3587,9 +3262,6 @@ static void fbcon_exit(void)
+ if (fbcon_has_exited)
+ return;
+
+- kfree((void *)softback_buf);
+- softback_buf = 0UL;
+-
+ for (i = 0; i < FB_MAX; i++) {
+ int pending = 0;
+
--- /dev/null
+From 99b82a1437cb31340dbb2c437a2923b9814a7b15 Mon Sep 17 00:00:00 2001
+From: Wanpeng Li <wanpengli@tencent.com>
+Date: Wed, 19 Aug 2020 16:55:27 +0800
+Subject: KVM: VMX: Don't freeze guest when event delivery causes an APIC-access exit
+
+From: Wanpeng Li <wanpengli@tencent.com>
+
+commit 99b82a1437cb31340dbb2c437a2923b9814a7b15 upstream.
+
+According to SDM 27.2.4, Event delivery causes an APIC-access VM exit.
+Don't report internal error and freeze guest when event delivery causes
+an APIC-access exit, it is handleable and the event will be re-injected
+during the next vmentry.
+
+Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
+Message-Id: <1597827327-25055-2-git-send-email-wanpengli@tencent.com>
+Cc: stable@vger.kernel.org
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/kvm/vmx.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/x86/kvm/vmx.c
++++ b/arch/x86/kvm/vmx.c
+@@ -8235,6 +8235,7 @@ static int vmx_handle_exit(struct kvm_vc
+ (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
+ exit_reason != EXIT_REASON_EPT_VIOLATION &&
+ exit_reason != EXIT_REASON_PML_FULL &&
++ exit_reason != EXIT_REASON_APIC_ACCESS &&
+ exit_reason != EXIT_REASON_TASK_SWITCH)) {
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;
btrfs-fix-wrong-address-when-faulting-in-pages-in-the-search-ioctl.patch
scsi-target-iscsi-fix-hang-in-iscsit_access_np-when-getting-tpg-np_login_sem.patch
rbd-require-global-cap_sys_admin-for-mapping-and-unmapping.patch
+fbcon-remove-soft-scrollback-code.patch
+fbcon-remove-now-unusued-softback_lines-cursor-argument.patch
+vgacon-remove-software-scrollback-support.patch
+kvm-vmx-don-t-freeze-guest-when-event-delivery-causes-an-apic-access-exit.patch
+video-fbdev-fix-oob-read-in-vga_8planes_imageblit.patch
+usb-serial-ftdi_sio-add-ids-for-xsens-mti-usb-converter.patch
+usb-serial-option-add-support-for-sim7070-sim7080-sim7090-modules.patch
+usb-fix-out-of-sync-data-toggle-if-a-configured-device-is-reconfigured.patch
--- /dev/null
+From cfd54fa83a5068b61b7eb28d3c117d8354c74c7a Mon Sep 17 00:00:00 2001
+From: Mathias Nyman <mathias.nyman@linux.intel.com>
+Date: Tue, 1 Sep 2020 11:25:28 +0300
+Subject: usb: Fix out of sync data toggle if a configured device is reconfigured
+
+From: Mathias Nyman <mathias.nyman@linux.intel.com>
+
+commit cfd54fa83a5068b61b7eb28d3c117d8354c74c7a upstream.
+
+Userspace drivers that use a SetConfiguration() request to "lightweight"
+reset an already configured usb device might cause data toggles to get out
+of sync between the device and host, and the device becomes unusable.
+
+The xHCI host requires endpoints to be dropped and added back to reset the
+toggle. If USB core notices the new configuration is the same as the
+current active configuration it will avoid these extra steps by calling
+usb_reset_configuration() instead of usb_set_configuration().
+
+A SetConfiguration() request will reset the device side data toggles.
+Make sure usb_reset_configuration() function also drops and adds back the
+endpoints to ensure data toggles are in sync.
+
+To avoid code duplication split the current usb_disable_device() function
+and reuse the endpoint specific part.
+
+Cc: stable <stable@vger.kernel.org>
+Tested-by: Martin Thierer <mthierer@gmail.com>
+Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
+Link: https://lore.kernel.org/r/20200901082528.12557-1-mathias.nyman@linux.intel.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/usb/core/message.c | 93 ++++++++++++++++++++-------------------------
+ 1 file changed, 43 insertions(+), 50 deletions(-)
+
+--- a/drivers/usb/core/message.c
++++ b/drivers/usb/core/message.c
+@@ -1141,6 +1141,34 @@ void usb_disable_interface(struct usb_de
+ }
+ }
+
++/*
++ * usb_disable_device_endpoints -- Disable all endpoints for a device
++ * @dev: the device whose endpoints are being disabled
++ * @skip_ep0: 0 to disable endpoint 0, 1 to skip it.
++ */
++static void usb_disable_device_endpoints(struct usb_device *dev, int skip_ep0)
++{
++ struct usb_hcd *hcd = bus_to_hcd(dev->bus);
++ int i;
++
++ if (hcd->driver->check_bandwidth) {
++ /* First pass: Cancel URBs, leave endpoint pointers intact. */
++ for (i = skip_ep0; i < 16; ++i) {
++ usb_disable_endpoint(dev, i, false);
++ usb_disable_endpoint(dev, i + USB_DIR_IN, false);
++ }
++ /* Remove endpoints from the host controller internal state */
++ mutex_lock(hcd->bandwidth_mutex);
++ usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
++ mutex_unlock(hcd->bandwidth_mutex);
++ }
++ /* Second pass: remove endpoint pointers */
++ for (i = skip_ep0; i < 16; ++i) {
++ usb_disable_endpoint(dev, i, true);
++ usb_disable_endpoint(dev, i + USB_DIR_IN, true);
++ }
++}
++
+ /**
+ * usb_disable_device - Disable all the endpoints for a USB device
+ * @dev: the device whose endpoints are being disabled
+@@ -1154,7 +1182,6 @@ void usb_disable_interface(struct usb_de
+ void usb_disable_device(struct usb_device *dev, int skip_ep0)
+ {
+ int i;
+- struct usb_hcd *hcd = bus_to_hcd(dev->bus);
+
+ /* getting rid of interfaces will disconnect
+ * any drivers bound to them (a key side effect)
+@@ -1200,22 +1227,8 @@ void usb_disable_device(struct usb_devic
+
+ dev_dbg(&dev->dev, "%s nuking %s URBs\n", __func__,
+ skip_ep0 ? "non-ep0" : "all");
+- if (hcd->driver->check_bandwidth) {
+- /* First pass: Cancel URBs, leave endpoint pointers intact. */
+- for (i = skip_ep0; i < 16; ++i) {
+- usb_disable_endpoint(dev, i, false);
+- usb_disable_endpoint(dev, i + USB_DIR_IN, false);
+- }
+- /* Remove endpoints from the host controller internal state */
+- mutex_lock(hcd->bandwidth_mutex);
+- usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
+- mutex_unlock(hcd->bandwidth_mutex);
+- /* Second pass: remove endpoint pointers */
+- }
+- for (i = skip_ep0; i < 16; ++i) {
+- usb_disable_endpoint(dev, i, true);
+- usb_disable_endpoint(dev, i + USB_DIR_IN, true);
+- }
++
++ usb_disable_device_endpoints(dev, skip_ep0);
+ }
+
+ /**
+@@ -1458,6 +1471,9 @@ EXPORT_SYMBOL_GPL(usb_set_interface);
+ * The caller must own the device lock.
+ *
+ * Return: Zero on success, else a negative error code.
++ *
++ * If this routine fails the device will probably be in an unusable state
++ * with endpoints disabled, and interfaces only partially enabled.
+ */
+ int usb_reset_configuration(struct usb_device *dev)
+ {
+@@ -1473,10 +1489,7 @@ int usb_reset_configuration(struct usb_d
+ * calls during probe() are fine
+ */
+
+- for (i = 1; i < 16; ++i) {
+- usb_disable_endpoint(dev, i, true);
+- usb_disable_endpoint(dev, i + USB_DIR_IN, true);
+- }
++ usb_disable_device_endpoints(dev, 1); /* skip ep0*/
+
+ config = dev->actconfig;
+ retval = 0;
+@@ -1489,34 +1502,10 @@ int usb_reset_configuration(struct usb_d
+ mutex_unlock(hcd->bandwidth_mutex);
+ return -ENOMEM;
+ }
+- /* Make sure we have enough bandwidth for each alternate setting 0 */
+- for (i = 0; i < config->desc.bNumInterfaces; i++) {
+- struct usb_interface *intf = config->interface[i];
+- struct usb_host_interface *alt;
+-
+- alt = usb_altnum_to_altsetting(intf, 0);
+- if (!alt)
+- alt = &intf->altsetting[0];
+- if (alt != intf->cur_altsetting)
+- retval = usb_hcd_alloc_bandwidth(dev, NULL,
+- intf->cur_altsetting, alt);
+- if (retval < 0)
+- break;
+- }
+- /* If not, reinstate the old alternate settings */
++
++ /* xHCI adds all endpoints in usb_hcd_alloc_bandwidth */
++ retval = usb_hcd_alloc_bandwidth(dev, config, NULL, NULL);
+ if (retval < 0) {
+-reset_old_alts:
+- for (i--; i >= 0; i--) {
+- struct usb_interface *intf = config->interface[i];
+- struct usb_host_interface *alt;
+-
+- alt = usb_altnum_to_altsetting(intf, 0);
+- if (!alt)
+- alt = &intf->altsetting[0];
+- if (alt != intf->cur_altsetting)
+- usb_hcd_alloc_bandwidth(dev, NULL,
+- alt, intf->cur_altsetting);
+- }
+ usb_enable_lpm(dev);
+ mutex_unlock(hcd->bandwidth_mutex);
+ return retval;
+@@ -1525,8 +1514,12 @@ reset_old_alts:
+ USB_REQ_SET_CONFIGURATION, 0,
+ config->desc.bConfigurationValue, 0,
+ NULL, 0, USB_CTRL_SET_TIMEOUT);
+- if (retval < 0)
+- goto reset_old_alts;
++ if (retval < 0) {
++ usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
++ usb_enable_lpm(dev);
++ mutex_unlock(hcd->bandwidth_mutex);
++ return retval;
++ }
+ mutex_unlock(hcd->bandwidth_mutex);
+
+ /* re-init hc/hcd interface/endpoint state */
--- /dev/null
+From 6ccc48e0eb2f3a5f3bd39954a21317e5f8874726 Mon Sep 17 00:00:00 2001
+From: Patrick Riphagen <patrick.riphagen@xsens.com>
+Date: Thu, 6 Aug 2020 13:55:47 +0200
+Subject: USB: serial: ftdi_sio: add IDs for Xsens Mti USB converter
+
+From: Patrick Riphagen <patrick.riphagen@xsens.com>
+
+commit 6ccc48e0eb2f3a5f3bd39954a21317e5f8874726 upstream.
+
+The device added has an FTDI chip inside.
+The device is used to connect Xsens USB Motion Trackers.
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Patrick Riphagen <patrick.riphagen@xsens.com>
+Signed-off-by: Johan Hovold <johan@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/usb/serial/ftdi_sio.c | 1 +
+ drivers/usb/serial/ftdi_sio_ids.h | 1 +
+ 2 files changed, 2 insertions(+)
+
+--- a/drivers/usb/serial/ftdi_sio.c
++++ b/drivers/usb/serial/ftdi_sio.c
+@@ -708,6 +708,7 @@ static const struct usb_device_id id_tab
+ { USB_DEVICE(XSENS_VID, XSENS_AWINDA_STATION_PID) },
+ { USB_DEVICE(XSENS_VID, XSENS_CONVERTER_PID) },
+ { USB_DEVICE(XSENS_VID, XSENS_MTDEVBOARD_PID) },
++ { USB_DEVICE(XSENS_VID, XSENS_MTIUSBCONVERTER_PID) },
+ { USB_DEVICE(XSENS_VID, XSENS_MTW_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_OMNI1509) },
+ { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
+--- a/drivers/usb/serial/ftdi_sio_ids.h
++++ b/drivers/usb/serial/ftdi_sio_ids.h
+@@ -159,6 +159,7 @@
+ #define XSENS_AWINDA_DONGLE_PID 0x0102
+ #define XSENS_MTW_PID 0x0200 /* Xsens MTw */
+ #define XSENS_MTDEVBOARD_PID 0x0300 /* Motion Tracker Development Board */
++#define XSENS_MTIUSBCONVERTER_PID 0x0301 /* MTi USB converter */
+ #define XSENS_CONVERTER_PID 0xD00D /* Xsens USB-serial converter */
+
+ /* Xsens devices using FTDI VID */
--- /dev/null
+From 1ac698790819b83f39fd7ea4f6cdabee9bdd7b38 Mon Sep 17 00:00:00 2001
+From: Aleksander Morgado <aleksander@aleksander.es>
+Date: Sat, 29 Aug 2020 11:05:39 +0200
+Subject: USB: serial: option: add support for SIM7070/SIM7080/SIM7090 modules
+
+From: Aleksander Morgado <aleksander@aleksander.es>
+
+commit 1ac698790819b83f39fd7ea4f6cdabee9bdd7b38 upstream.
+
+These modules have 2 different USB layouts:
+
+The default layout with PID 0x9205 (AT+CUSBSELNV=1) exposes 4 TTYs and
+an ECM interface:
+
+ T: Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 6 Spd=480 MxCh= 0
+ D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
+ P: Vendor=1e0e ProdID=9205 Rev=00.00
+ S: Manufacturer=SimTech, Incorporated
+ S: Product=SimTech SIM7080
+ S: SerialNumber=1234567890ABCDEF
+ C: #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
+ I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
+ I: If#=0x5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
+
+The purpose of each TTY is as follows:
+ * ttyUSB0: DIAG/QCDM port.
+ * ttyUSB1: GNSS data.
+ * ttyUSB2: AT-capable port (control).
+ * ttyUSB3: AT-capable port (data).
+
+In the secondary layout with PID=0x9206 (AT+CUSBSELNV=86) the module
+exposes 6 TTY ports:
+
+ T: Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 8 Spd=480 MxCh= 0
+ D: Ver= 2.00 Cls=02(commc) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
+ P: Vendor=1e0e ProdID=9206 Rev=00.00
+ S: Manufacturer=SimTech, Incorporated
+ S: Product=SimTech SIM7080
+ S: SerialNumber=1234567890ABCDEF
+ C: #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
+ I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+ I: If#=0x5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
+
+The purpose of each TTY is as follows:
+ * ttyUSB0: DIAG/QCDM port.
+ * ttyUSB1: GNSS data.
+ * ttyUSB2: AT-capable port (control).
+ * ttyUSB3: QFLOG interface.
+ * ttyUSB4: DAM interface.
+ * ttyUSB5: AT-capable port (data).
+
+Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
+Cc: stable@vger.kernel.org
+Signed-off-by: Johan Hovold <johan@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/usb/serial/option.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/usb/serial/option.c
++++ b/drivers/usb/serial/option.c
+@@ -1808,6 +1808,8 @@ static const struct usb_device_id option
+ { USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) }, /* Simcom SIM7500/SIM7600 MBIM mode */
+ { USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff), /* Simcom SIM7500/SIM7600 RNDIS mode */
+ .driver_info = RSVD(7) },
++ { USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) }, /* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
++ { USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) }, /* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
+ { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
+ .driver_info = NCTRL(0) | NCTRL(1) | RSVD(4) },
+ { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X220_X500D),
--- /dev/null
+From 973c096f6a85e5b5f2a295126ba6928d9a6afd45 Mon Sep 17 00:00:00 2001
+From: Linus Torvalds <torvalds@linux-foundation.org>
+Date: Wed, 9 Sep 2020 14:53:50 -0700
+Subject: vgacon: remove software scrollback support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Linus Torvalds <torvalds@linux-foundation.org>
+
+commit 973c096f6a85e5b5f2a295126ba6928d9a6afd45 upstream.
+
+Yunhai Zhang recently fixed a VGA software scrollback bug in commit
+ebfdfeeae8c0 ("vgacon: Fix for missing check in scrollback handling"),
+but that then made people look more closely at some of this code, and
+there were more problems on the vgacon side, but also the fbcon software
+scrollback.
+
+We don't really have anybody who maintains this code - probably because
+nobody actually _uses_ it any more. Sure, people still use both VGA and
+the framebuffer consoles, but they are no longer the main user
+interfaces to the kernel, and haven't been for decades, so these kinds
+of extra features end up bitrotting and not really being used.
+
+So rather than try to maintain a likely unused set of code, I'll just
+aggressively remove it, and see if anybody even notices. Maybe there
+are people who haven't jumped on the whole GUI badnwagon yet, and think
+it's just a fad. And maybe those people use the scrollback code.
+
+If that turns out to be the case, we can resurrect this again, once
+we've found the sucker^Wmaintainer for it who actually uses it.
+
+Reported-by: NopNop Nop <nopitydays@gmail.com>
+Tested-by: Willy Tarreau <w@1wt.eu>
+Cc: 张云海 <zhangyunhai@nsfocus.com>
+Acked-by: Andy Lutomirski <luto@amacapital.net>
+Acked-by: Willy Tarreau <w@1wt.eu>
+Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/powerpc/configs/pasemi_defconfig | 1
+ arch/powerpc/configs/ppc6xx_defconfig | 1
+ arch/x86/configs/i386_defconfig | 1
+ arch/x86/configs/x86_64_defconfig | 1
+ drivers/video/console/Kconfig | 25 -----
+ drivers/video/console/vgacon.c | 161 ----------------------------------
+ 6 files changed, 1 insertion(+), 189 deletions(-)
+
+--- a/arch/powerpc/configs/pasemi_defconfig
++++ b/arch/powerpc/configs/pasemi_defconfig
+@@ -115,7 +115,6 @@ CONFIG_FB_NVIDIA=y
+ CONFIG_FB_NVIDIA_I2C=y
+ CONFIG_FB_RADEON=y
+ # CONFIG_LCD_CLASS_DEVICE is not set
+-CONFIG_VGACON_SOFT_SCROLLBACK=y
+ CONFIG_LOGO=y
+ CONFIG_SOUND=y
+ CONFIG_SND=y
+--- a/arch/powerpc/configs/ppc6xx_defconfig
++++ b/arch/powerpc/configs/ppc6xx_defconfig
+@@ -797,7 +797,6 @@ CONFIG_FB_TRIDENT=m
+ CONFIG_FB_SM501=m
+ CONFIG_FB_IBM_GXT4500=y
+ CONFIG_LCD_PLATFORM=m
+-CONFIG_VGACON_SOFT_SCROLLBACK=y
+ CONFIG_FRAMEBUFFER_CONSOLE=y
+ CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
+ CONFIG_LOGO=y
+--- a/arch/x86/configs/i386_defconfig
++++ b/arch/x86/configs/i386_defconfig
+@@ -218,7 +218,6 @@ CONFIG_FB_MODE_HELPERS=y
+ CONFIG_FB_TILEBLITTING=y
+ CONFIG_FB_EFI=y
+ # CONFIG_LCD_CLASS_DEVICE is not set
+-CONFIG_VGACON_SOFT_SCROLLBACK=y
+ CONFIG_LOGO=y
+ # CONFIG_LOGO_LINUX_MONO is not set
+ # CONFIG_LOGO_LINUX_VGA16 is not set
+--- a/arch/x86/configs/x86_64_defconfig
++++ b/arch/x86/configs/x86_64_defconfig
+@@ -212,7 +212,6 @@ CONFIG_FB_MODE_HELPERS=y
+ CONFIG_FB_TILEBLITTING=y
+ CONFIG_FB_EFI=y
+ # CONFIG_LCD_CLASS_DEVICE is not set
+-CONFIG_VGACON_SOFT_SCROLLBACK=y
+ CONFIG_LOGO=y
+ # CONFIG_LOGO_LINUX_MONO is not set
+ # CONFIG_LOGO_LINUX_VGA16 is not set
+--- a/drivers/video/console/Kconfig
++++ b/drivers/video/console/Kconfig
+@@ -22,31 +22,6 @@ config VGA_CONSOLE
+
+ Say Y.
+
+-config VGACON_SOFT_SCROLLBACK
+- bool "Enable Scrollback Buffer in System RAM"
+- depends on VGA_CONSOLE
+- default n
+- help
+- The scrollback buffer of the standard VGA console is located in
+- the VGA RAM. The size of this RAM is fixed and is quite small.
+- If you require a larger scrollback buffer, this can be placed in
+- System RAM which is dynamically allocated during initialization.
+- Placing the scrollback buffer in System RAM will slightly slow
+- down the console.
+-
+- If you want this feature, say 'Y' here and enter the amount of
+- RAM to allocate for this buffer. If unsure, say 'N'.
+-
+-config VGACON_SOFT_SCROLLBACK_SIZE
+- int "Scrollback Buffer Size (in KB)"
+- depends on VGACON_SOFT_SCROLLBACK
+- range 1 1024
+- default "64"
+- help
+- Enter the amount of System RAM to allocate for the scrollback
+- buffer. Each 64KB will give you approximately 16 80x25
+- screenfuls of scrollback buffer
+-
+ config MDA_CONSOLE
+ depends on !M68K && !PARISC && ISA
+ tristate "MDA text console (dual-headed)"
+--- a/drivers/video/console/vgacon.c
++++ b/drivers/video/console/vgacon.c
+@@ -180,159 +180,6 @@ static inline void vga_set_mem_top(struc
+ write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
+ }
+
+-#ifdef CONFIG_VGACON_SOFT_SCROLLBACK
+-/* software scrollback */
+-static void *vgacon_scrollback;
+-static int vgacon_scrollback_tail;
+-static int vgacon_scrollback_size;
+-static int vgacon_scrollback_rows;
+-static int vgacon_scrollback_cnt;
+-static int vgacon_scrollback_cur;
+-static int vgacon_scrollback_save;
+-static int vgacon_scrollback_restore;
+-
+-static void vgacon_scrollback_init(int pitch)
+-{
+- int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch;
+-
+- if (vgacon_scrollback) {
+- vgacon_scrollback_cnt = 0;
+- vgacon_scrollback_tail = 0;
+- vgacon_scrollback_cur = 0;
+- vgacon_scrollback_rows = rows - 1;
+- vgacon_scrollback_size = rows * pitch;
+- }
+-}
+-
+-static void vgacon_scrollback_startup(void)
+-{
+- vgacon_scrollback = kcalloc(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024, GFP_NOWAIT);
+- vgacon_scrollback_init(vga_video_num_columns * 2);
+-}
+-
+-static void vgacon_scrollback_update(struct vc_data *c, int t, int count)
+-{
+- void *p;
+-
+- if (!vgacon_scrollback_size || c->vc_num != fg_console)
+- return;
+-
+- p = (void *) (c->vc_origin + t * c->vc_size_row);
+-
+- while (count--) {
+- if ((vgacon_scrollback_tail + c->vc_size_row) >
+- vgacon_scrollback_size)
+- vgacon_scrollback_tail = 0;
+-
+- scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail,
+- p, c->vc_size_row);
+- vgacon_scrollback_cnt++;
+- p += c->vc_size_row;
+- vgacon_scrollback_tail += c->vc_size_row;
+-
+- if (vgacon_scrollback_tail >= vgacon_scrollback_size)
+- vgacon_scrollback_tail = 0;
+-
+- if (vgacon_scrollback_cnt > vgacon_scrollback_rows)
+- vgacon_scrollback_cnt = vgacon_scrollback_rows;
+-
+- vgacon_scrollback_cur = vgacon_scrollback_cnt;
+- }
+-}
+-
+-static void vgacon_restore_screen(struct vc_data *c)
+-{
+- vgacon_scrollback_save = 0;
+-
+- if (!vga_is_gfx && !vgacon_scrollback_restore) {
+- scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
+- c->vc_screenbuf_size > vga_vram_size ?
+- vga_vram_size : c->vc_screenbuf_size);
+- vgacon_scrollback_restore = 1;
+- vgacon_scrollback_cur = vgacon_scrollback_cnt;
+- }
+-}
+-
+-static int vgacon_scrolldelta(struct vc_data *c, int lines)
+-{
+- int start, end, count, soff;
+-
+- if (!lines) {
+- c->vc_visible_origin = c->vc_origin;
+- vga_set_mem_top(c);
+- return 1;
+- }
+-
+- if (!vgacon_scrollback)
+- return 1;
+-
+- if (!vgacon_scrollback_save) {
+- vgacon_cursor(c, CM_ERASE);
+- vgacon_save_screen(c);
+- vgacon_scrollback_save = 1;
+- }
+-
+- vgacon_scrollback_restore = 0;
+- start = vgacon_scrollback_cur + lines;
+- end = start + abs(lines);
+-
+- if (start < 0)
+- start = 0;
+-
+- if (start > vgacon_scrollback_cnt)
+- start = vgacon_scrollback_cnt;
+-
+- if (end < 0)
+- end = 0;
+-
+- if (end > vgacon_scrollback_cnt)
+- end = vgacon_scrollback_cnt;
+-
+- vgacon_scrollback_cur = start;
+- count = end - start;
+- soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) *
+- c->vc_size_row);
+- soff -= count * c->vc_size_row;
+-
+- if (soff < 0)
+- soff += vgacon_scrollback_size;
+-
+- count = vgacon_scrollback_cnt - start;
+-
+- if (count > c->vc_rows)
+- count = c->vc_rows;
+-
+- if (count) {
+- int copysize;
+-
+- int diff = c->vc_rows - count;
+- void *d = (void *) c->vc_origin;
+- void *s = (void *) c->vc_screenbuf;
+-
+- count *= c->vc_size_row;
+- /* how much memory to end of buffer left? */
+- copysize = min(count, vgacon_scrollback_size - soff);
+- scr_memcpyw(d, vgacon_scrollback + soff, copysize);
+- d += copysize;
+- count -= copysize;
+-
+- if (count) {
+- scr_memcpyw(d, vgacon_scrollback, count);
+- d += count;
+- }
+-
+- if (diff)
+- scr_memcpyw(d, s, diff * c->vc_size_row);
+- } else
+- vgacon_cursor(c, CM_MOVE);
+-
+- return 1;
+-}
+-#else
+-#define vgacon_scrollback_startup(...) do { } while (0)
+-#define vgacon_scrollback_init(...) do { } while (0)
+-#define vgacon_scrollback_update(...) do { } while (0)
+-
+ static void vgacon_restore_screen(struct vc_data *c)
+ {
+ if (c->vc_origin != c->vc_visible_origin)
+@@ -369,7 +216,6 @@ static int vgacon_scrolldelta(struct vc_
+ vga_set_mem_top(c);
+ return 1;
+ }
+-#endif /* CONFIG_VGACON_SOFT_SCROLLBACK */
+
+ static const char *vgacon_startup(void)
+ {
+@@ -566,10 +412,7 @@ static const char *vgacon_startup(void)
+ vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH;
+ vgacon_yres = vga_scan_lines;
+
+- if (!vga_init_done) {
+- vgacon_scrollback_startup();
+- vga_init_done = 1;
+- }
++ vga_init_done = 1;
+
+ return display_desc;
+ }
+@@ -865,7 +708,6 @@ static int vgacon_switch(struct vc_data
+ vgacon_doresize(c, c->vc_cols, c->vc_rows);
+ }
+
+- vgacon_scrollback_init(c->vc_size_row);
+ return 0; /* Redrawing not needed */
+ }
+
+@@ -1398,7 +1240,6 @@ static int vgacon_scroll(struct vc_data
+ oldo = c->vc_origin;
+ delta = lines * c->vc_size_row;
+ if (dir == SM_UP) {
+- vgacon_scrollback_update(c, t, lines);
+ if (c->vc_scr_end + delta >= vga_vram_end) {
+ scr_memcpyw((u16 *) vga_vram_base,
+ (u16 *) (oldo + delta),
--- /dev/null
+From bd018a6a75cebb511bb55a0e7690024be975fe93 Mon Sep 17 00:00:00 2001
+From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
+Date: Mon, 31 Aug 2020 19:37:00 +0900
+Subject: video: fbdev: fix OOB read in vga_8planes_imageblit()
+
+From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
+
+commit bd018a6a75cebb511bb55a0e7690024be975fe93 upstream.
+
+syzbot is reporting OOB read at vga_8planes_imageblit() [1], for
+"cdat[y] >> 4" can become a negative value due to "const char *cdat".
+
+[1] https://syzkaller.appspot.com/bug?id=0d7a0da1557dcd1989e00cb3692b26d4173b4132
+
+Reported-by: syzbot <syzbot+69fbd3e01470f169c8c4@syzkaller.appspotmail.com>
+Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
+Cc: stable <stable@vger.kernel.org>
+Link: https://lore.kernel.org/r/90b55ec3-d5b0-3307-9f7c-7ff5c5fd6ad3@i-love.sakura.ne.jp
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/video/fbdev/vga16fb.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/video/fbdev/vga16fb.c
++++ b/drivers/video/fbdev/vga16fb.c
+@@ -1122,7 +1122,7 @@ static void vga_8planes_imageblit(struct
+ char oldop = setop(0);
+ char oldsr = setsr(0);
+ char oldmask = selectmask();
+- const char *cdat = image->data;
++ const unsigned char *cdat = image->data;
+ u32 dx = image->dx;
+ char __iomem *where;
+ int y;
projects / thirdparty / kernel / stable-queue.git / commitdiff
