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fuse: Freeze client on suspend when request sent to userspace

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Suspend attempts can abort when the FUSE daemon is already frozen
and a client is waiting uninterruptibly for a response, causing
freezing of tasks to fail.

Use the freeze-friendly wait API, but disregard other signals.

Change-Id: Icefb7e4bbc718ccb76bf3c04daaa5eeea7e0e63c
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2011-08-24 15:01:30 -07:00
committed by Colin Cross
parent 73f1329d13
commit d893d660b7
1 changed files with 5 additions and 1 deletions
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6
fs/fuse/dev.c
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@@ -19,6 +19,7 @@
#include <linux/pipe_fs_i.h>
#include <linux/swap.h>
#include <linux/splice.h>
#include <linux/freezer.h>
MODULE_ALIAS_MISCDEV(FUSE_MINOR);
MODULE_ALIAS("devname:fuse");
@@ -387,7 +388,10 @@ __acquires(fc->lock)
* Wait it out.
*/
spin_unlock(&fc->lock);
wait_event(req->waitq, req->state == FUSE_REQ_FINISHED);
while (req->state != FUSE_REQ_FINISHED)
wait_event_freezable(req->waitq,
req->state == FUSE_REQ_FINISHED);
spin_lock(&fc->lock);
if (!req->aborted)