From: Christopher Alexander Tobias Schulze Date: Sun, 3 Aug 2014 14:01:53 +0000 (+0200) Subject: sunsab: Fix detection of BREAK on sunsab serial console X-Git-Tag: firefly_0821_release~3679^2~1680 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff0adae5df0ff94592f03f84c952e624f0945a7c;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- 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;