On 02/02/16 11:06, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
It does not look like this code needs to wait atomically?
Higher in the call chain it calls the GEM API and I do
not see that the section is under any spin locks or such.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Alex Dai <yu.dai@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc_loader.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index 3accd914490f..82a3c03fbc0e 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -199,7 +199,7 @@ static void set_guc_init_params(struct drm_i915_private *dev_priv)
* the value matches either of two values representing completion
* of the GuC boot process.
*
- * This is used for polling the GuC status in a wait_for_atomic()
+ * This is used for polling the GuC status in a wait_for()
* loop below.
*/
static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
@@ -259,14 +259,14 @@ static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv)
I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
/*
- * Spin-wait for the DMA to complete & the GuC to start up.
+ * Wait for the DMA to complete & the GuC to start up.
* NB: Docs recommend not using the interrupt for completion.
* Measurements indicate this should take no more than 20ms, so a
* timeout here indicates that the GuC has failed and is unusable.
* (Higher levels of the driver will attempt to fall back to
* execlist mode if this happens.)
*/
- ret = wait_for_atomic(guc_ucode_response(dev_priv, &status), 100);
+ ret = wait_for(guc_ucode_response(dev_priv, &status), 100);
DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n",
I915_READ(DMA_CTRL), status);
LGTM.
Reviewed-by: Dave Gordon <david.s.gordon@xxxxxxxxx>
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