evie/android_kernel_oneplus_msm8998
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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 John Stultz
parent 8f832d4ac1
commit d111876c7e
1 changed files with 4 additions and 1 deletions
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5
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");
@ -473,7 +474,9 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
* Either request is already in userspace, or it was forced.
* Wait it out.
*/
wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags));
while (!test_bit(FR_FINISHED, &req->flags))
wait_event_freezable(req->waitq,
test_bit(FR_FINISHED, &req->flags));
}
static void __fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)