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From 5516ab86a873efc78fc356b0979294203f1cffb0 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 9 Jul 2015 23:32:50 +0200
Subject: [PATCH 0450/1050] drm/amdgpu: don't grab dev->struct_mutex in pm
functions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Similar to radeon, except that amdgpu doesn't even use struct_mutex to
protect anything like the shared z buffer (sane gpu architecture,
yay!). And the code already grabs the globa adev->ring_lock, so this
code can't race with itself. Which makes struct_mutex completely
redundnant. Remove it.
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 25b329f..efed115 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -580,7 +580,6 @@ force:
amdgpu_dpm_print_power_state(adev, adev->pm.dpm.requested_ps);
}
- mutex_lock(&adev->ddev->struct_mutex);
mutex_lock(&adev->ring_lock);
/* update whether vce is active */
@@ -628,7 +627,6 @@ force:
done:
mutex_unlock(&adev->ring_lock);
- mutex_unlock(&adev->ddev->struct_mutex);
}
void amdgpu_dpm_enable_uvd(struct amdgpu_device *adev, bool enable)
--
1.9.1
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