From: Christopher Alexander Tobias Schulze <cat.schulze@xxxxxxxxxxxxx>
Fix detection of BREAK on sunsab serial console: BREAK detection was only
performed when there were also serial characters received simultaneously.
To handle all BREAKs correctly, the check for BREAK and the corresponding
call to uart_handle_break() must also be done if count == 0, therefore
duplicate this code fragment and pull it out of the loop over the received
characters.
Patch applies to 3.16-rc6.
Signed-off-by: Christopher Alexander Tobias Schulze <cat.schulze@xxxxxxxxxxxxx>
---
diff -Naupr linux-3.16-rc6-orig/drivers/tty/serial/sunsab.c linux-3.16-rc6-patched/drivers/tty/serial/sunsab.c
--- linux-3.16-rc6-orig/drivers/tty/serial/sunsab.c 2014-07-27 11:50:32.000000000 +0200
+++ linux-3.16-rc6-patched/drivers/tty/serial/sunsab.c 2014-08-03 15:59:41.000000000 +0200
@@ -157,6 +157,15 @@ receive_chars(struct uart_sunsab_port *u
(up->port.line == up->port.cons->index))
saw_console_brk = 1;
+ if (count == 0) {
+ if (unlikely(stat->sreg.isr1 & SAB82532_ISR1_BRK)) {
+ stat->sreg.isr0 &= ~(SAB82532_ISR0_PERR |
+ SAB82532_ISR0_FERR);
+ up->port.icount.brk++;
+ uart_handle_break(&up->port);
+ }
+ }
+
for (i = 0; i < count; i++) {
unsigned char ch = buf[i], flag;
--
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