[PATCH 1/3] staging: dgnc: remove redundant NULL check in

Daeseok Youn
2016-05-04T05:13:04Z

tty and ch are already checked for NULL
before calling dgnc_block_til_ready().

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
---
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 2cecdb0..d85d005 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