diff options
| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2019-12-04 21:23:08 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-09 16:08:19 -0500 |
| commit | 0f899fd466b693a129b16994c1b2b4db2fcde4a4 (patch) | |
| tree | eeaa5e9705a701ac6e665860383950c8d734f605 /drivers/gpu/drm/amd/amdkfd/kfd_process.c | |
| parent | ea117312ea9f4113c4a8f4571a9ba189248721c4 (diff) | |
drm/amdkfd: Improve kfd_process lookup in kfd_ioctl
Use filep->private_data to store a pointer to the kfd_process data
structure. Take an extra reference for that, which gets released in
the kfd_release callback. Check that the process calling kfd_ioctl
is the same that opened the file descriptor. Return -EBADF if it's
not, so that this error can be distinguished in user mode.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_process.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 8276601a122f..536a153ac9a4 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -324,6 +324,8 @@ struct kfd_process *kfd_create_process(struct file *filep) (int)process->lead_thread->pid); } out: + if (!IS_ERR(process)) + kref_get(&process->ref); mutex_unlock(&kfd_processes_mutex); return process; |