From 76ae0536ddc0aa576f2aac11f0f82d0fd60b522c Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 26 Feb 2014 12:01:49 +0100 Subject: [PATCH] parport: fix interruptible_sleep_on race The interruptible_sleep_on function is can still lead to the deadlock mentioned in the comment above the caller, and we want to remove it soon, so replace it now with the race-free wait_event_interruptible. Signed-off-by: Arnd Bergmann Cc: Andrew Morton Cc: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/parport/share.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/parport/share.c b/drivers/parport/share.c index 6a83ee1e9178..3fa66244ce32 100644 --- a/drivers/parport/share.c +++ b/drivers/parport/share.c @@ -905,7 +905,8 @@ int parport_claim_or_block(struct pardevice *dev) /* If dev->waiting is clear now, an interrupt gave us the port and we would deadlock if we slept. */ if (dev->waiting) { - interruptible_sleep_on (&dev->wait_q); + wait_event_interruptible(dev->wait_q, + !dev->waiting); if (signal_pending (current)) { return -EINTR; } -- GitLab