| Message ID | 20240119104526.1221243-2-tudor.ambarus@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | serial: samsung: gs101 updates and winter cleanup | expand |
On Fri, Jan 19, 2024 at 4:45 AM Tudor Ambarus <tudor.ambarus@linaro.org> wrote: > > The core expects for tx_empty() either TIOCSER_TEMT when the tx is > empty or 0 otherwise. s3c24xx_serial_txempty_nofifo() might return > 0x4, and at least uart_get_lsr_info() tries to clear exactly > TIOCSER_TEMT (BIT(1)). Fix tx_empty() to return TIOCSER_TEMT. > > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") > Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> > --- Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> > drivers/tty/serial/samsung_tty.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c > index 71d17d804fda..6fdb32b83346 100644 > --- a/drivers/tty/serial/samsung_tty.c > +++ b/drivers/tty/serial/samsung_tty.c > @@ -987,11 +987,10 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) > if ((ufstat & info->tx_fifomask) != 0 || > (ufstat & info->tx_fifofull)) > return 0; > - > - return 1; > + return TIOCSER_TEMT; > } > > - return s3c24xx_serial_txempty_nofifo(port); > + return s3c24xx_serial_txempty_nofifo(port) ? TIOCSER_TEMT : 0; > } > > /* no modem control lines */ > -- > 2.43.0.429.g432eaa2c6b-goog >
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 71d17d804fda..6fdb32b83346 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -987,11 +987,10 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) if ((ufstat & info->tx_fifomask) != 0 || (ufstat & info->tx_fifofull)) return 0; - - return 1; + return TIOCSER_TEMT; } - return s3c24xx_serial_txempty_nofifo(port); + return s3c24xx_serial_txempty_nofifo(port) ? TIOCSER_TEMT : 0; } /* no modem control lines */
The core expects for tx_empty() either TIOCSER_TEMT when the tx is empty or 0 otherwise. s3c24xx_serial_txempty_nofifo() might return 0x4, and at least uart_get_lsr_info() tries to clear exactly TIOCSER_TEMT (BIT(1)). Fix tx_empty() to return TIOCSER_TEMT. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> --- drivers/tty/serial/samsung_tty.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)