On Sunday 16 October 2005 17:06, [email protected] wrote:
> HI
>
> THanks for all the hints.
>
> Here's my fix for the situation in the uinput.
> It generally breaks when Force feedback is removed,
> sometimes request id slot is not freed correctly and
> it can lead to crash and/or running out of slots.
>
> Without knowing much what I'm doing, I added one
> lock and it seems to fix the problem.
>
The lock is not really needed, please try the patch below.
--
Dmitry
Input: uniput - fix crash on SMP
Only signal completion after marking request slot as free,
otherwise other processor can free request structure before
we finish using it.
Signed-off-by: Dmitry Torokhov <[email protected]>
---
drivers/input/misc/uinput.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
Index: work/drivers/input/misc/uinput.c
===================================================================
--- work.orig/drivers/input/misc/uinput.c
+++ work/drivers/input/misc/uinput.c
@@ -90,11 +90,11 @@ static inline int uinput_request_reserve
static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request)
{
- complete(&request->done);
-
/* Mark slot as available */
udev->requests[request->id] = NULL;
wake_up_interruptible(&udev->requests_waitq);
+
+ complete(&request->done);
}
static int uinput_request_submit(struct input_dev *dev, struct uinput_request *request)
-
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