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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-17 10:24:53 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-17 10:24:53 +1000 |
| commit | 492b057c426e4aa747484958e18e9da29003985d (patch) | |
| tree | 34e08c24618688d8bcc190523028b5f94cce0c0b /drivers/serial/atmel_serial.c | |
| parent | 313485175da221c388f6a8ecf4c30062ba9bea17 (diff) | |
| parent | 300df7dc89cc276377fc020704e34875d5c473b6 (diff) | |
| download | blackbird-op-linux-492b057c426e4aa747484958e18e9da29003985d.tar.gz blackbird-op-linux-492b057c426e4aa747484958e18e9da29003985d.zip | |
Merge commit 'origin/master' into next
Diffstat (limited to 'drivers/serial/atmel_serial.c')
| -rw-r--r-- | drivers/serial/atmel_serial.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index b3497d7e5354..338b15c0a548 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -1104,11 +1104,13 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, /* update the per-port timeout */ uart_update_timeout(port, termios->c_cflag, baud); - /* save/disable interrupts and drain transmitter */ + /* + * save/disable interrupts. The tty layer will ensure that the + * transmitter is empty if requested by the caller, so there's + * no need to wait for it here. + */ imr = UART_GET_IMR(port); UART_PUT_IDR(port, -1); - while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) - cpu_relax(); /* disable receiver and transmitter */ UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS); |
