ANDROID: fuse: Freeze client on suspend when request sent to userspace
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>
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 70ea57c..a9e1d70 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -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");
@@ -449,7 +450,9 @@
* 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)