diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-04-13 09:50:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-13 09:50:21 +0200 |
| commit | 659c36fcda403013a01b85da07cf2d9711e6d6c7 (patch) | |
| tree | ece2e7d0e2c19ea5a3d0ec172ad0b81a8a19021d /drivers/tty/serial/bfin_uart.c | |
| parent | 9521d830b6341d1887dcfc2aebde23fbfa5f1473 (diff) | |
| parent | 5a7ed29c7572d00a75e8c4529e30c5ac2ef82271 (diff) | |
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Fixes and improvements for perf/core:
. Overhaul the tools/ makefiles, gluing them to the top level Makefile, from
Borislav Petkov.
. Move the UI files from tools/perf/util/ui/ to tools/perf/ui/. Also move
the GTK+ browser to tools/perf/ui/gtk/, from Namhyung Kim.
. Only fallback to sw cycles counter on ENOENT for the hw cycles, from
Robert Richter
. Trivial fixes from Robert Richter
. Handle the autogenerated bison/flex files better, from Namhyung and Jiri Olsa.
. Navigate jump instructions in the annotate browser, just press enter or ->,
still needs support for a jump navigation history, i.e. to go back.
. Search string in the annotate browser: same keys as vim:
/ forward
n next backward/forward
? backward
. Clarify number of events/samples in the report header, from Ashay Rane
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/tty/serial/bfin_uart.c')
| -rw-r--r-- | drivers/tty/serial/bfin_uart.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index 26953bfa692..5832fdef11e 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -535,11 +535,13 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id) * when start a new tx. */ UART_CLEAR_IER(uart, ETBEI); - xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); uart->port.icount.tx += uart->tx_count; + if (!uart_circ_empty(xmit)) { + xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uart->port); + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&uart->port); + } bfin_serial_dma_tx_chars(uart); } |