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Subject[PATCH v4] drm/amd/amdgpu/amdgpu_drv.c: Replace drm_modeset_lock_all with drm_modeset_lock
Date
drm_modeset_lock_all() is not needed here, so it is replaced with
drm_modeset_lock(). The crtc list around which we are looping never
changes, therefore the only lock we need is to protect access to
crtc->state.

Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---

Changes from v3: CC'ed more (previously missing) maintainers.
Changes from v2: Drop file name from the Subject. Cc'ed all maintainers.
Changes from v1: Removed unnecessary braces around single statement
block.

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 80130c1c0c68..39204dbc168b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1595,17 +1595,15 @@ static int amdgpu_pmops_runtime_idle(struct device *dev)
if (amdgpu_device_has_dc_support(adev)) {
struct drm_crtc *crtc;

- drm_modeset_lock_all(drm_dev);
-
drm_for_each_crtc(crtc, drm_dev) {
- if (crtc->state->active) {
+ drm_modeset_lock(&crtc->mutex, NULL);
+ if (crtc->state->active)
ret = -EBUSY;
+ drm_modeset_unlock(&crtc->mutex);
+ if (ret < 0)
break;
- }
}

- drm_modeset_unlock_all(drm_dev);
-
} else {
struct drm_connector *list_connector;
struct drm_connector_list_iter iter;
--
2.31.1
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