| Message ID | 20240110102102.61587-13-tudor.ambarus@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | serial: samsung: gs101 updates and winter cleanup | expand |
On Wed, Jan 10, 2024 at 4:24 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. Respect the core and use TIOCSER_TEMT. > > Signed-off-by: Tudor Ambarus <tudor.ambarus@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 f2413da14b1d..46fba70f3d77 100644 > --- a/drivers/tty/serial/samsung_tty.c > +++ b/drivers/tty/serial/samsung_tty.c > @@ -990,11 +990,10 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) > if (ufcon & S3C2410_UFCON_FIFOMODE) { > if ((ufstat & info->tx_fifomask) || (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; And because s3c24xx_serial_txempty_nofifo() might actually return 0x4, and at least uart_get_lsr_info() tries to clear exactly 0x1 bit, this brings functional change, which I think is in fact a fix. So a "Fixed:" tag is needed here. > } > > /* no modem control lines */ > -- > 2.43.0.472.g3155946c3a-goog > >
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index f2413da14b1d..46fba70f3d77 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -990,11 +990,10 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) if (ufcon & S3C2410_UFCON_FIFOMODE) { if ((ufstat & info->tx_fifomask) || (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. Respect the core and use TIOCSER_TEMT. Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> --- drivers/tty/serial/samsung_tty.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)