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SubjectRe: [PATCH 1/2 RESEND] staging: dgnc: remove redundant NULL checks in
2016-05-10 15:44 GMT+09:00 Daeseok Youn <daeseok.youn@gmail.com>:
> The dgnc_block_til_ready() is only used in dgnc_tty_open().
> The unit data(struct un_t) was stored into tty->driver_data in dgnc_tty_open().
> And also tty and un were tested about NULL so these variables doesn't
> need to check for NULL in dgnc_block_til_ready().
>
> Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
> ---
Hello Greg,

This patch and patches from this were not merged into your tree for a one month.
Can you tell me why these are still waiting to merge?

Thanks.
regards,
Daeseok.


> RESEND: more explanation about this patch.
> origin patch : https://lkml.org/lkml/2016/5/4/12
>
> drivers/staging/dgnc/dgnc_tty.c | 9 ++-------
> 1 file changed, 2 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
> index a505775..cff34d4 100644
> --- a/drivers/staging/dgnc/dgnc_tty.c
> +++ b/drivers/staging/dgnc/dgnc_tty.c
> @@ -1172,17 +1172,12 @@ static int dgnc_block_til_ready(struct tty_struct *tty,
> struct channel_t *ch)
> {
> int retval = 0;
> - struct un_t *un = NULL;
> + struct un_t *un = tty->driver_data;
> unsigned long flags;
> uint old_flags = 0;
> int sleep_on_un_flags = 0;
>
> - if (!tty || tty->magic != TTY_MAGIC || !file || !ch ||
> - ch->magic != DGNC_CHANNEL_MAGIC)
> - return -ENXIO;
> -
> - un = tty->driver_data;
> - if (!un || un->magic != DGNC_UNIT_MAGIC)
> + if (!file)
> return -ENXIO;
>
> spin_lock_irqsave(&ch->ch_lock, flags);
> --
> 2.8.2
>

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