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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-03 15:51:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-03 15:51:22 -0700
commitdab058fd5ff834cb3b9de1d930ce731a605eb0c6 (patch)
tree33963e3af2b40b925eda0baf29bd2fd2ccafca4f
parentMerge branch 'for-linus' of git://git.kernel.dk/linux-block (diff)
downloadlinux-dev-dab058fd5ff834cb3b9de1d930ce731a605eb0c6.tar.xz
linux-dev-dab058fd5ff834cb3b9de1d930ce731a605eb0c6.zip
floppy: cancel any pending fd_timeouts before adding a new one
In commit 070ad7e793dc ("floppy: convert to delayed work and single-thread wq") the 'fd_timeout' timer was converted to a delayed work. However, the "del_timer(&fd_timeout)" was lost in the process, and any previous pending timeouts would stay active when we then re-queued the timeout. This resulted in the floppy probe sequence having a (stale) 20s timeout rather than the intended 3s timeout, and thus made booting with the floppy driver (but no actual floppy controller) take much longer than it should. Of course, there's little reason for most people to compile the floppy driver into the kernel at all, which is why most people never noticed. Canceling the delayed work where we used to do the del_timer() fixes the issue, and makes the floppy probing use the proper new timeout instead. The three second timeout is still very wasteful, but better than the 20s one. Reported-and-tested-by: Andi Kleen <ak@linux.intel.com> Reported-and-tested-by: Calvin Walton <calvin.walton@kepstin.ca> Cc: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/block/floppy.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index cce7df367b79..553f43a90953 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -671,6 +671,7 @@ static void __reschedule_timeout(int drive, const char *message)
if (drive == current_reqD)
drive = current_drive;
+ __cancel_delayed_work(&fd_timeout);
if (drive < 0 || drive >= N_DRIVE) {
delay = 20UL * HZ;