diff options
| author | Johan Hovold <[email protected]> | 2021-04-21 11:55:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2021-04-22 12:09:26 +0200 |
| commit | 3f6dbe6212bdd2094db84015ddef3d1f50fcde20 (patch) | |
| tree | 25dd901a5d05f2eebbfd0be4bb4e6403a5c66f7b | |
| parent | 0f8a732822bab43313400e5ae6af6560e4a7ce85 (diff) | |
serial: sunsu: drop low-latency workaround
The sunsu driver has been carrying a workaround for the infamous
low_latency behaviour of tty_flip_buffer_push() by dropping and
reacquiring the port lock in the interrupt handler since 2004.
Since commit a9c3f68f3cd8 ("tty: Fix low_latency BUG"),
tty_flip_buffer_push() always schedules a work item to push data to the
line discipline and there's no need to keep any low_latency hacks around.
Cc: "David S. Miller" <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/tty/serial/sunsu.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index 319e5ceb6130..12c2468f2b0e 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -466,12 +466,8 @@ static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) if (status & UART_LSR_THRE) transmit_chars(up); - spin_unlock_irqrestore(&up->port.lock, flags); - tty_flip_buffer_push(&up->port.state->port); - spin_lock_irqsave(&up->port.lock, flags); - } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); spin_unlock_irqrestore(&up->port.lock, flags); |