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

[Daeseok Youn]

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

Signed-off-by: Daeseok Youn <daeseok.y...@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