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| author | Christopher Alexander Tobias Schulze <cat.schulze@alice-dsl.net> | 2014-08-03 16:01:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-14 09:24:16 +0800 |
| commit | ff0adae5df0ff94592f03f84c952e624f0945a7c (patch) | |
| tree | f5e641828195349bd64b2824c58cec7a773e89b1 | |
| parent | c1853d6752caa7843dfd51121df1f95697514499 (diff) | |
| download | lwn-ff0adae5df0ff94592f03f84c952e624f0945a7c.tar.gz lwn-ff0adae5df0ff94592f03f84c952e624f0945a7c.zip | |
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.c | 9 |
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; |