--- /dev/null
+From f5b556c94c8490d42fea79d7b4ae0ecbc291e69d Mon Sep 17 00:00:00 2001
+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Thu, 24 Mar 2016 16:02:52 +0100
+Subject: MIPS: ath79: make bootconsole wait for both THRE and TEMT
+
+From: Matthias Schiffer <mschiffer@universe-factory.net>
+
+commit f5b556c94c8490d42fea79d7b4ae0ecbc291e69d upstream.
+
+This makes the ath79 bootconsole behave the same way as the generic 8250
+bootconsole.
+
+Also waiting for TEMT (transmit buffer is empty) instead of just THRE
+(transmit buffer is not full) ensures that all characters have been
+transmitted before the real serial driver starts reconfiguring the serial
+controller (which would sometimes result in garbage being transmitted.)
+This change does not cause a visible performance loss.
+
+In addition, this seems to fix a hang observed in certain configurations on
+many AR7xxx/AR9xxx SoCs during autoconfig of the real serial driver.
+
+A more complete follow-up patch will disable 8250 autoconfig for ath79
+altogether (the serial controller is detected as a 16550A, which is not
+fully compatible with the ath79 serial, and the autoconfig may lead to
+undefined behavior on ath79.)
+
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/mips/ath79/early_printk.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+--- a/arch/mips/ath79/early_printk.c
++++ b/arch/mips/ath79/early_printk.c
+@@ -31,13 +31,15 @@ static inline void prom_putchar_wait(voi
+ } while (1);
+ }
+
++#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
++
+ static void prom_putchar_ar71xx(unsigned char ch)
+ {
+ void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE));
+
+- prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
++ prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY);
+ __raw_writel(ch, base + UART_TX * 4);
+- prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
++ prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY);
+ }
+
+ static void prom_putchar_ar933x(unsigned char ch)
--- /dev/null
+From 5daebc477da4dfeb31ae193d83084def58fd2697 Mon Sep 17 00:00:00 2001
+From: James Hogan <james.hogan@imgtec.com>
+Date: Mon, 8 Feb 2016 18:43:49 +0000
+Subject: MIPS: Fix siginfo.h to use strict posix types
+
+From: James Hogan <james.hogan@imgtec.com>
+
+commit 5daebc477da4dfeb31ae193d83084def58fd2697 upstream.
+
+Commit 85efde6f4e0d ("make exported headers use strict posix types")
+changed the asm-generic siginfo.h to use the __kernel_* types, and
+commit 3a471cbc081b ("remove __KERNEL_STRICT_NAMES") make the internal
+types accessible only to the kernel, but the MIPS implementation hasn't
+been updated to match.
+
+Switch to proper types now so that the exported asm/siginfo.h won't
+produce quite so many compiler errors when included alone by a user
+program.
+
+Signed-off-by: James Hogan <james.hogan@imgtec.com>
+Cc: Christopher Ferris <cferris@google.com>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/12477/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/mips/include/uapi/asm/siginfo.h | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+--- a/arch/mips/include/uapi/asm/siginfo.h
++++ b/arch/mips/include/uapi/asm/siginfo.h
+@@ -48,13 +48,13 @@ typedef struct siginfo {
+
+ /* kill() */
+ struct {
+- pid_t _pid; /* sender's pid */
++ __kernel_pid_t _pid; /* sender's pid */
+ __ARCH_SI_UID_T _uid; /* sender's uid */
+ } _kill;
+
+ /* POSIX.1b timers */
+ struct {
+- timer_t _tid; /* timer id */
++ __kernel_timer_t _tid; /* timer id */
+ int _overrun; /* overrun count */
+ char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
+ sigval_t _sigval; /* same as below */
+@@ -63,26 +63,26 @@ typedef struct siginfo {
+
+ /* POSIX.1b signals */
+ struct {
+- pid_t _pid; /* sender's pid */
++ __kernel_pid_t _pid; /* sender's pid */
+ __ARCH_SI_UID_T _uid; /* sender's uid */
+ sigval_t _sigval;
+ } _rt;
+
+ /* SIGCHLD */
+ struct {
+- pid_t _pid; /* which child */
++ __kernel_pid_t _pid; /* which child */
+ __ARCH_SI_UID_T _uid; /* sender's uid */
+ int _status; /* exit code */
+- clock_t _utime;
+- clock_t _stime;
++ __kernel_clock_t _utime;
++ __kernel_clock_t _stime;
+ } _sigchld;
+
+ /* IRIX SIGCHLD */
+ struct {
+- pid_t _pid; /* which child */
+- clock_t _utime;
++ __kernel_pid_t _pid; /* which child */
++ __kernel_clock_t _utime;
+ int _status; /* exit code */
+- clock_t _stime;
++ __kernel_clock_t _stime;
+ } _irix_sigchld;
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
projects / thirdparty / kernel / stable-queue.git / commitdiff
