um: deadlock in line_write_interrupt()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>

um: deadlock in line_write_interrupt()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
Al Viro · Richard Weinberger
1 parent 64405360ce
Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff
arch/um/drivers/line.c
@@ -344,6 +344,7 @@
 	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;
...	...	@@ -344,6 +344,7 @@
344	344	spin_lock(&line->lock);
345	345	err = flush_buffer(line);
346	346	if (err == 0) {
	347	+ spin_unlock(&line->lock);
347	348	return IRQ_NONE;
348	349	} else if (err < 0) {
349	350	line->head = line->buffer;