USB: keyspan: fix overrun-error reporting

commit 855515a6d3731242d85850a206f2ec084c917338 upstream.

Fix reporting of overrun errors, which are not associated with a
character. Instead insert a null character and report only once.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
[lizf: Backported to 3.4:
 - s/&port->port/tty
 - adjust context
 - adjust indentation]
Signed-off-by: Zefan Li <lizefan@huawei.com>

diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 5704ced74b27fced154f554ac3a44de21f9cffd4..0879ac7fd2cbfc361767cf6ebd801a46e0c09d41 100644 (file)
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -323,12 +323,11 @@ static void       usa26_indat_callback(struct urb *urb)
                if ((data[0] & 0x80) == 0) {
                        /* no errors on individual bytes, only
                           possible overrun err */
-                       if (data[0] & RXERROR_OVERRUN)
-                               err = TTY_OVERRUN;
-                       else
-                               err = 0;
+                       if (data[0] & RXERROR_OVERRUN) {
+                               tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+                       }
                        for (i = 1; i < urb->actual_length ; ++i)
-                               tty_insert_flip_char(tty, data[i], err);
+                               tty_insert_flip_char(tty, data[i], TTY_NORMAL);
                } else {
                        /* some bytes had errors, every byte has status */
                        dbg("%s - RX error!!!!", __func__);
@@ -859,13 +858,13 @@ static void usa90_indat_callback(struct urb *urb)
                        if ((data[0] & 0x80) == 0) {
                                /* no errors on individual bytes, only
                                   possible overrun err*/
-                               if (data[0] & RXERROR_OVERRUN)
-                                       err = TTY_OVERRUN;
-                               else
-                                       err = 0;
+                               if (data[0] & RXERROR_OVERRUN) {
+                                       tty_insert_flip_char(tty, 0,
+                                                               TTY_OVERRUN);
+                               }
                                for (i = 1; i < urb->actual_length ; ++i)
                                        tty_insert_flip_char(tty, data[i],
-                                                                       err);
+                                                               TTY_NORMAL);
                        }  else {
                        /* some bytes had errors, every byte has status */
                                dbg("%s - RX error!!!!", __func__);