On Fri, Sep 21, 2012 at 08:07:19PM +0530, Shubhrajyoti D wrote:
> This patch does the following
> - In case of errors if there least one data character in the RX FIFO
> read it otherwise it may stall the receiver.
>
> This is recommended in the interrupt reset method in the table 23-246 of
> the omap4 TRM.
>
> Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx>
FWIW:
Reviewed-by: Felipe Balbi <balbi@xxxxxx>
> ---
> - Tested on omap4sdp.
> - pm tested hitting off in idle and suspend.
> - v2 changes update the changelogs.
> - Also remove the dummy check as FE , PE , BI and OE are the only
> receiver errors.
>
> drivers/tty/serial/omap-serial.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
> index a0d4460..4fea16b 100644
> --- a/drivers/tty/serial/omap-serial.c
> +++ b/drivers/tty/serial/omap-serial.c
> @@ -334,6 +334,10 @@ static unsigned int check_modem_status(struct uart_omap_port *up)
> static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr)
> {
> unsigned int flag;
> + unsigned char ch = 0;
> +
> + if (likely(lsr & UART_LSR_DR))
> + ch = serial_in(up, UART_RX);
>
> up->port.icount.rx++;
> flag = TTY_NORMAL;
> --
> 1.7.5.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-omap" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
balbi
Attachment:
signature.asc
Description: Digital signature
