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Char: synclink, remove unnecessary checks 

Stanse found a potential null dereference in mgsl_put_char and
mgsl_write. There is a check for tty being NULL, but it is
dereferenced earlier.

Actually, tty cannot be NULL in .write and .put_char, so remove
the tests.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby 2010-01-10 12:30:16 +01:00 committed by Greg Kroah-Hartman
parent e6c4ef984e
commit ca1cce49c2
1 changed files with 2 additions and 2 deletions
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4
drivers/char/synclink.c
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@ -2031,7 +2031,7 @@ static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
return 0;
if (!tty || !info->xmit_buf)
if (!info->xmit_buf)
return 0;
spin_lock_irqsave(&info->irq_spinlock, flags);
@ -2121,7 +2121,7 @@ static int mgsl_write(struct tty_struct * tty,
if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
goto cleanup;
if (!tty || !info->xmit_buf)
if (!info->xmit_buf)
goto cleanup;
if ( info->params.mode == MGSL_MODE_HDLC ||