diff options
| author | Oded Gabbay <oded.gabbay@amd.com> | 2015-02-17 11:58:27 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@amd.com> | 2015-02-23 10:47:56 +0200 |
| commit | 1365aa6266fad0669487240af3f098593796172c (patch) | |
| tree | 5aec9b1e27fb9f362b6aeded3aaaaee17e097f85 /drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
drm/amdkfd: Initialize only amdkfd's assigned pipelines
This patch fixes a bug in the initialization of the pipelines. The
init_pipelines() function was called with a constant value of 0 in the
first_pipe argument. This is an error because amdkfd doesn't handle pipe 0.
The correct way is to pass the value that get_first_pipe() returns as the
argument for first_pipe.
This bug appeared in 3.19 (first version with amdkfd) and it causes around 15%
drop in CPU performance of Kaveri (A10-7850).
v2: Don't set get_first_pipe() as inline because it calls BUG_ON()
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c index 6b072466e2a6..5469efe0523e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_cik.c @@ -131,5 +131,5 @@ static int register_process_cik(struct device_queue_manager *dqm, static int initialize_cpsch_cik(struct device_queue_manager *dqm) { - return init_pipelines(dqm, get_pipes_num(dqm), 0); + return init_pipelines(dqm, get_pipes_num(dqm), get_first_pipe(dqm)); } |