The "result" variable in dgnc_get_mstat() was initialized with "-EIO". But if the "ch" is not null, "result" will be set to zero and if the "ch" is null, dgnc_get_mstat() will return "-ENXIO" as an error. So "-EIO" error value was useless in dgnc_get_mstat(). Signed-off-by: Daeseok Youn <daeseok.youn@xxxxxxxxx> --- RESEND: update subject and change log origin patch : https://lkml.org/lkml/2016/5/4/13 drivers/staging/dgnc/dgnc_tty.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c index cff34d4..30db091 100644 --- a/drivers/staging/dgnc/dgnc_tty.c +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -1979,7 +1979,7 @@ static void dgnc_tty_send_xchar(struct tty_struct *tty, char c) static inline int dgnc_get_mstat(struct channel_t *ch) { unsigned char mstat; - int result = -EIO; + int result = 0; unsigned long flags; if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) @@ -1991,8 +1991,6 @@ static inline int dgnc_get_mstat(struct channel_t *ch) spin_unlock_irqrestore(&ch->ch_lock, flags); - result = 0; - if (mstat & UART_MCR_DTR) result |= TIOCM_DTR; if (mstat & UART_MCR_RTS) -- 2.8.2 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
