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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2017-09-07 02:31:29 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-10-24 02:32:29 +0300
commit8e009118a45af30451ff4bbae2b6efd9575d6694 (patch)
tree2b5ee42caeaa13d96874ef0003313cb201a0de75 /drivers/input
parent8446b32b0675b432451bdb35bd193597477f1bfa (diff)
downloadlinux-8e009118a45af30451ff4bbae2b6efd9575d6694.tar.xz
Input: uinput - allow FF requests to time out
Previously uinput force feedback requests waited for the userspace indefinitely, which caused users to block when uinput server process become unresponsive. Let's establish a 30 seconds deadline for servicing upload and erase force feedback effect actions, so that users have a chance to abort stuck requests. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/misc/uinput.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 443151de90c6..c30704fa1a06 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -149,7 +149,11 @@ static int uinput_request_submit(struct uinput_device *udev,
if (retval)
goto out;
- wait_for_completion(&request->done);
+ if (!wait_for_completion_timeout(&request->done, 30 * HZ)) {
+ retval = -ETIMEDOUT;
+ goto out;
+ }
+
retval = request->retval;
out: