From 199eebbae45791af0f37184dd495f16a6cf5c34a Mon Sep 17 00:00:00 2001 From: Al Viro <viro@zeniv.linux.org.uk> Date: Sat, 11 Feb 2012 03:05:32 -0500 Subject: [PATCH] um: deadlock in line_write_interrupt() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> --- arch/um/drivers/line.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 4a3c853689a3..4ab0d9c0911c 100644 --- 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;