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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-06 09:41:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-06 09:41:23 -0700
commit049711bf3cc59501ebeae621aa22acd3918ebd79 (patch)
treed6168b7bb3d8cee71a4a4e43a85cfaf2a3ef1a0a /drivers/tty/serial/sunsab.c
parentae045e2455429c418a418a3376301a9e5753a0a8 (diff)
parent5b6ff9df056b69a3b65708bfb9923af41146c8c8 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next
Pull sparc updates from David Miller: 1) Add sparc RAM output to /proc/iomem, from Bob Picco. 2) Allow seeks on /dev/mdesc, from Khalid Aziz. 3) Cleanup sparc64 I/O accessors, from Sam Ravnborg. 4) If update_mmu_cache{,_pmd}() is called with an not-valid mapping, do not insert it into the TLB miss hash tables otherwise we'll livelock. Based upon work by Christopher Alexander Tobias Schulze. 5) Fix BREAK detection in sunsab driver when no actual characters are pending, from Christopher Alexander Tobias Schulze. 6) Because we have modules --> openfirmware --> vmalloc ordering of virtual memory, the lazy VMAP TLB flusher can cons up an invocation of flush_tlb_kernel_range() that covers the openfirmware address range. Unfortunately this will flush out the firmware's locked TLB mapping which causes all kinds of trouble. Just split up the flush request if this happens, but in the long term the lazy VMAP flusher should probably be made a little bit smarter. Based upon work by Christopher Alexander Tobias Schulze. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next: sparc64: Fix up merge thinko. sparc: Add "install" target arch/sparc/math-emu/math_32.c: drop stray break operator sparc64: ldc_connect() should not return EINVAL when handshake is in progress. sparc64: Guard against flushing openfirmware mappings. sunsab: Fix detection of BREAK on sunsab serial console bbc-i2c: Fix BBC I2C envctrl on SunBlade 2000 sparc64: Do not insert non-valid PTEs into the TSB hash table. sparc64: avoid code duplication in io_64.h sparc64: reorder functions in io_64.h sparc64: drop unused SLOW_DOWN_IO definitions sparc64: remove macro indirection in io_64.h sparc64: update IO access functions in PeeCeeI sparcspkr: use sbus_*() primitives for IO sparc: Add support for seek and shorter read to /dev/mdesc sparc: use %s for unaligned panic drivers/sbus/char: Micro-optimization in display7seg.c display7seg: Introduce the use of the managed version of kzalloc sparc64 - add mem to iomem resource
Diffstat (limited to 'drivers/tty/serial/sunsab.c')
-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 bb09920ac9c7..b9598b227a45 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;