um: deadlock in line_write_interrupt()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
git-mirror · Mar 24, 2012 · 199eebb · 199eebb
1 parent 6440536
commit 199eebb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
@@ -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;