diff options
| author | Pan Bian <bianpan2016@163.com> | 2016-12-01 16:10:42 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-08 10:26:05 +0200 |
| commit | 09831a9577669fa16f4369a934e88d8ff644cfe0 (patch) | |
| tree | 176c9e5ac0c49efc2c7ff524747738f32cce5754 | |
| parent | 68b94d6c4edb74bd71d539dffc0bd0ca8a16dea4 (diff) | |
drm/amdkfd: fix improper return value on error
[ Upstream commit 8bf793883da213864efc50c274d2b38ec0ca58b2 ]
In function kfd_wait_on_events(), when the call to copy_from_user()
fails, the value of return variable ret is 0. 0 indicates success, which
is inconsistent with the execution status. This patch fixes the bug by
assigning "-EFAULT" to ret when copy_from_user() returns an unexpected
value.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_events.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c index a6a4b2b1c0d9..6a3470f84998 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c @@ -739,8 +739,10 @@ int kfd_wait_on_events(struct kfd_process *p, struct kfd_event_data event_data; if (copy_from_user(&event_data, &events[i], - sizeof(struct kfd_event_data))) + sizeof(struct kfd_event_data))) { + ret = -EFAULT; goto fail; + } ret = init_event_waiter(p, &event_waiters[i], event_data.event_id, i); |