[PATCH] drm/amdgpu: treat negative lockup timeout as 'infinite timeout' V2

[Evan Quan]

Negative lockup timeout is valid and will be treated as
'infinite timeout'.

- V2: use msecs_to_jiffies for negative values

Change-Id: I0d8387956a9c744073c0281ef2e1a547d4f16dec
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index c5fba79c3660..bcd59ba07bb0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -237,13 +237,14 @@ module_param_named(msi, amdgpu_msi, int, 0444);
  * Set GPU scheduler timeout value in ms.
  *
  * The format can be [Non-Compute] or [GFX,Compute,SDMA,Video]. That is there can be one or
- * multiple values specified. 0 and negative values are invalidated. They will be adjusted
- * to default timeout.
+ * multiple values specified.
  *  - With one value specified, the setting will apply to all non-compute jobs.
  *  - With multiple values specified, the first one will be for GFX. The second one is for Compute.
  *    And the third and fourth ones are for SDMA and Video.
  * By default(with no lockup_timeout settings), the timeout for all non-compute(GFX, SDMA and Video)
  * jobs is 10000. And there is no timeout enforced on compute jobs.
+ * Value 0 is invalidated, will be adjusted to default timeout settings.
+ * Negative values mean 'infinite timeout' (MAX_JIFFY_OFFSET).
  */
 MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (default: 10000 for non-compute jobs and no timeout for compute jobs), "
 		"format is [Non-Compute] or [GFX,Compute,SDMA,Video]");
@@ -1339,24 +1340,27 @@ int amdgpu_device_get_job_timeout_settings(struct amdgpu_device *adev)
 			if (ret)
 				return ret;
 
-			/* Invalidate 0 and negative values */
-			if (timeout <= 0) {
+			/*
+			 * Value 0 will be adjusted to default timeout settings.
+			 * Negative values mean 'infinite timeout' (MAX_JIFFY_OFFSET).
+			 */
+			if (!timeout) {
 				index++;
 				continue;
 			}
 
 			switch (index++) {
 			case 0:
-				adev->gfx_timeout = timeout;
+				adev->gfx_timeout = msecs_to_jiffies(timeout);
 				break;
 			case 1:
-				adev->compute_timeout = timeout;
+				adev->compute_timeout = msecs_to_jiffies(timeout);
 				break;
 			case 2:
-				adev->sdma_timeout = timeout;
+				adev->sdma_timeout = msecs_to_jiffies(timeout);
 				break;
 			case 3:
-				adev->video_timeout = timeout;
+				adev->video_timeout = msecs_to_jiffies(timeout);
 				break;
 			default:
 				break;
-- 
2.21.0