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drm/amdkfd: fix clock counter retrieval for node without GPU

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[ Upstream commit 1cf6cc74bbeb85bb87c3ca3f3df97a283c3aa737 ]

Currently if a user requests clock counters for a node without a GPU
resource we will always return EINVAL.

Instead if no GPU resource is attached, fill the gpu_clock_counter
argument with zeroes so that we may proceed and return valid CPU
counters.

Signed-off-by: Andres Rodriguez <andres.rodriguez@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andres Rodriguez 2018-04-10 17:32:33 -04:00 committed by Greg Kroah-Hartman
parent 73ea96beb7
commit 56dfe52e04
1 changed files with 7 additions and 6 deletions
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13
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -716,12 +716,13 @@ static int kfd_ioctl_get_clock_counters(struct file *filep,
struct timespec64 time;
dev = kfd_device_by_id(args->gpu_id);
if (dev == NULL)
return -EINVAL;
/* Reading GPU clock counter from KGD */
args->gpu_clock_counter =
dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
if (dev)
/* Reading GPU clock counter from KGD */
args->gpu_clock_counter =
dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
else
/* Node without GPU resource */
args->gpu_clock_counter = 0;
/* No access to rdtsc. Using raw monotonic time */
getrawmonotonic64(&time);