Those are now all protected using fb_helper->lock.
v2: We still need to hold mode_config.mutex right around calling
connector->fill_modes.
Cc: John Stultz <john.stultz@xxxxxxxxxx>
Cc: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 21 +++------------------
drivers/gpu/drm/drm_vblank.c | 2 +-
2 files changed, 4 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 400bbb07eff2..7aaac457eeaa 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -106,7 +106,7 @@ static DEFINE_MUTEX(kernel_fb_helper_lock);
*/
#define drm_fb_helper_for_each_connector(fbh, i__) \
- for (({ lockdep_assert_held(&(fbh)->dev->mode_config.mutex); }), \
+ for (({ lockdep_assert_held(&(fbh)->lock); }), \
i__ = 0; i__ < (fbh)->connector_count; i__++)
static int __drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
@@ -120,7 +120,6 @@ static int __drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
return 0;
lockdep_assert_held(&fb_helper->lock);
- lockdep_assert_held(&fb_helper->dev->mode_config.mutex);
count = fb_helper->connector_count + 1;
@@ -152,11 +151,7 @@ int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
int err;
mutex_lock(&fb_helper->lock);
- mutex_lock(&fb_helper->dev->mode_config.mutex);
-
err = __drm_fb_helper_add_one_connector(fb_helper, connector);
-
- mutex_unlock(&fb_helper->dev->mode_config.mutex);
mutex_unlock(&fb_helper->lock);
return err;
@@ -188,7 +183,6 @@ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
return 0;
mutex_lock(&fb_helper->lock);
- mutex_lock(&dev->mode_config.mutex);
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
ret = __drm_fb_helper_add_one_connector(fb_helper, connector);
@@ -210,7 +204,6 @@ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
fb_helper->connector_count = 0;
out:
drm_connector_list_iter_end(&conn_iter);
- mutex_unlock(&dev->mode_config.mutex);
mutex_unlock(&fb_helper->lock);
return ret;
@@ -253,11 +246,7 @@ int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
int err;
mutex_lock(&fb_helper->lock);
- mutex_lock(&fb_helper->dev->mode_config.mutex);
-
err = __drm_fb_helper_remove_one_connector(fb_helper, connector);
-
- mutex_unlock(&fb_helper->dev->mode_config.mutex);
mutex_unlock(&fb_helper->lock);
return err;
@@ -1900,10 +1889,12 @@ static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
int count = 0;
int i;
+ mutex_lock(&fb_helper->dev->mode_config.mutex);
drm_fb_helper_for_each_connector(fb_helper, i) {
connector = fb_helper->connector_info[i]->connector;
count += connector->funcs->fill_modes(connector, maxX, maxY);
}
+ mutex_unlock(&fb_helper->dev->mode_config.mutex);
return count;
}
@@ -2301,7 +2292,6 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
/* prevent concurrent modification of connector_count by hotplug */
lockdep_assert_held(&fb_helper->lock);
- lockdep_assert_held(&fb_helper->dev->mode_config.mutex);
crtcs = kcalloc(fb_helper->connector_count,
sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
@@ -2428,12 +2418,10 @@ int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
return 0;
mutex_lock(&fb_helper->lock);
- mutex_lock(&dev->mode_config.mutex);
drm_setup_crtcs(fb_helper,
dev->mode_config.max_width,
dev->mode_config.max_height);
ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
- mutex_unlock(&dev->mode_config.mutex);
mutex_unlock(&fb_helper->lock);
if (ret)
return ret;
@@ -2496,10 +2484,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
DRM_DEBUG_KMS("\n");
- mutex_lock(&dev->mode_config.mutex);
drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height);
-
- mutex_unlock(&dev->mode_config.mutex);
mutex_unlock(&fb_helper->lock);
drm_fb_helper_set_par(fb_helper->fbdev);
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 05d043e9219f..8099574c8a11 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -836,7 +836,7 @@ static void send_vblank_event(struct drm_device *dev,
* NOTE: Drivers using this to send out the &drm_crtc_state.event as part of an
* atomic commit must ensure that the next vblank happens at exactly the same
* time as the atomic commit is committed to the hardware. This function itself
- * does **not** protect again the next vblank interrupt racing with either this
+ * does **not** protect against the next vblank interrupt racing with either this
* function call or the atomic commit operation. A possible sequence could be:
*
* 1. Driver commits new hardware state into vblank-synchronized registers.
--
2.11.0
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