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um: deadlock in line_write_interrupt()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Al Viro 2012-02-11 03:05:32 -05:00 committed by Richard Weinberger
parent 64405360ce
commit 199eebbae4
1 changed files with 1 additions and 0 deletions
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arch/um/drivers/line.c
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@ -344,6 +344,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
spin_lock(&line->lock);
err = flush_buffer(line);
if (err == 0) {
spin_unlock(&line->lock);
return IRQ_NONE;
} else if (err < 0) {
line->head = line->buffer;