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authorChristopher Alexander Tobias Schulze <cat.schulze@alice-dsl.net>2014-08-03 16:01:53 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-08-14 09:24:16 +0800
commitff0adae5df0ff94592f03f84c952e624f0945a7c (patch)
treef5e641828195349bd64b2824c58cec7a773e89b1
parentc1853d6752caa7843dfd51121df1f95697514499 (diff)
sunsab: Fix detection of BREAK on sunsab serial console
[ Upstream commit fe418231b195c205701c0cc550a03f6c9758fd9e ] 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@alice-dsl.net> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/tty/serial/sunsab.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index a422c8b55a47..aa53fee1df63 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -157,6 +157,15 @@ receive_chars(struct uart_sunsab_port *up,
(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;