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uml: line.c: avoid NULL pointer dereference

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Assign tty only if line is not NULL.

[akpm@linux-foundation.org: simplification]
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Beregalov 2010-03-05 13:42:33 -08:00 committed by Linus Torvalds
parent be1494527c
commit 03315b5916
1 changed files with 2 additions and 2 deletions
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4
arch/um/drivers/line.c
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@ -18,10 +18,10 @@ static irqreturn_t line_interrupt(int irq, void *data)
{
struct chan *chan = data;
struct line *line = chan->line;
struct tty_struct *tty = line->tty;
struct tty_struct *tty;
if (line)
chan_interrupt(&line->chan_list, &line->task, tty, irq);
chan_interrupt(&line->chan_list, &line->task, line->tty, irq);
return IRQ_HANDLED;
}