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authorDaeseok Youn <daeseok.youn@gmail.com>2014-07-11 19:23:16 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-11 17:35:45 -0700
commit29a171c18fa8c136e535db62a888205f7fb9699c (patch)
treeb380af1df6f390e45c0f675e59ab4b34ebeafb02 /drivers/staging/dgap
parentffc11c103ac5ba2fa06794be5667fbd183bff056 (diff)
downloadlinux-stericsson-29a171c18fa8c136e535db62a888205f7fb9699c.tar.gz
staging: dgap: removes redundant null check and change paramter for dgap_tty_digigeta()
Null checks in dgap_tty_digigeta() are already done by dgap_tty_ioctl() and change "tty" as a paramter of this function to "ch" and "un". Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/dgap')
-rw-r--r--drivers/staging/dgap/dgap.c23
1 files changed, 5 insertions, 18 deletions
diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
index 160a960eb210..7ebbf507204f 100644
--- a/drivers/staging/dgap/dgap.c
+++ b/drivers/staging/dgap/dgap.c
@@ -86,8 +86,8 @@ static int dgap_block_til_ready(struct tty_struct *tty, struct file *file,
struct channel_t *ch);
static int dgap_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg);
-static int dgap_tty_digigeta(struct tty_struct *tty,
- struct digi_t __user *retinfo);
+static int dgap_tty_digigeta(struct channel_t *ch, struct un_t *un,
+ struct digi_t __user *retinfo);
static int dgap_tty_digiseta(struct channel_t *ch, struct board_t *bd,
struct un_t *un, struct digi_t __user *new_info);
static int dgap_tty_digigetedelay(struct tty_struct *tty, int __user *retinfo);
@@ -3189,28 +3189,15 @@ static int dgap_set_modem_info(struct tty_struct *tty, unsigned int command,
*
*
*/
-static int dgap_tty_digigeta(struct tty_struct *tty,
- struct digi_t __user *retinfo)
+static int dgap_tty_digigeta(struct channel_t *ch, struct un_t *un,
+ struct digi_t __user *retinfo)
{
- struct channel_t *ch;
- struct un_t *un;
struct digi_t tmp;
ulong lock_flags;
if (!retinfo)
return -EFAULT;
- if (!tty || tty->magic != TTY_MAGIC)
- return -EFAULT;
-
- un = tty->driver_data;
- if (!un || un->magic != DGAP_UNIT_MAGIC)
- return -EFAULT;
-
- ch = un->un_ch;
- if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
- return -EFAULT;
-
memset(&tmp, 0, sizeof(tmp));
spin_lock_irqsave(&ch->ch_lock, lock_flags);
@@ -4060,7 +4047,7 @@ static int dgap_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
/* get information for ditty */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
- return dgap_tty_digigeta(tty, uarg);
+ return dgap_tty_digigeta(ch, un, uarg);
case DIGI_SETAW:
case DIGI_SETAF: