[PATCHv2 2/2] fuse: use freezable wait in fuse_get_req()

[Sergey Senozhatsky]

Use freezable wait in fuse_get_req() so that it won't block
the system from entering suspend:

 Freezing user space processes failed after 20.009 seconds
 Call trace:
  __switch_to+0xcc/0x168
  schedule+0x57c/0x1138
  fuse_get_req+0xd0/0x2b0
  fuse_simple_request+0x120/0x620
  fuse_getxattr+0xe4/0x158
  fuse_xattr_get+0x2c/0x48
  __vfs_getxattr+0x160/0x1d8
  get_vfs_caps_from_disk+0x74/0x1a8
  __audit_inode+0x244/0x4d8
  user_path_at_empty+0x2e0/0x390
  __arm64_sys_faccessat+0xdc/0x260

Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---

v2: use wait_event_state_exclusive()

 fs/fuse/dev.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index e80cd8f2c049..a0fd319ab216 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -207,8 +207,9 @@ static struct fuse_req *fuse_get_req(struct mnt_idmap *idmap,
 
 	if (fuse_block_alloc(fc, for_background)) {
 		err = -EINTR;
-		if (wait_event_killable_exclusive(fc->blocked_waitq,
-				!fuse_block_alloc(fc, for_background)))
+		if (wait_event_state_exclusive(fc->blocked_waitq,
+				!fuse_block_alloc(fc, for_background),
+				(TASK_KILLABLE | TASK_FREEZABLE)))
 			goto out;
 	}
 	/* Matches smp_wmb() in fuse_set_initialized() */
-- 
2.50.0.rc1.591.g9c95f17f64-goog