From 9a9f5ce8db176499a7f3f93172bf34176aa460f5 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 9 Jul 2015 23:44:34 +0200
Subject: [PATCH] drm: Roll out drm_for_each_connector more
Now that we also grab the connection_mutex and so fixed the race with
atomic modeset we can use the iterator there too.
The other special case is drm_connector_unplug_all which would have a
locking inversion with the sysfs store/show functions if we'd grab the
mode_config.mutex around the unplug. We could just grab
connection_mutex instead, but that's a bit too much a dirty trick for
my taste. Also it's only used by udl, which doesn't do any other kind
of connector hotplugging, so should be race-free. Hence just stick
with a comment for now.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
drivers/gpu/drm/drm_atomic.c | 2 +-
drivers/gpu/drm/drm_atomic_helper.c | 4 ++--
drivers/gpu/drm/drm_crtc.c | 9 +++++----
drivers/gpu/drm/drm_crtc_helper.c | 6 +++---
drivers/gpu/drm/drm_edid.c | 2 +-
drivers/gpu/drm/drm_plane_helper.c | 3 ++-
6 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index f6f2fb58eb37f..dfc8aaa1457e4 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1063,7 +1063,7 @@ drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
* Changed connectors are already in @state, so only need to look at the
* current configuration.
*/
- list_for_each_entry(connector, &config->connector_list, head) {
+ drm_for_each_connector(connector, state->dev) {
if (connector->state->crtc != crtc)
continue;
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 5b59d5ad7d1c2..4ff334ba0382f 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -89,7 +89,7 @@ get_current_crtc_for_encoder(struct drm_device *dev,
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
- list_for_each_entry(connector, &config->connector_list, head) {
+ drm_for_each_connector(connector, dev) {
if (connector->state->best_encoder != encoder)
continue;
@@ -1986,7 +1986,7 @@ void drm_atomic_helper_connector_dpms(struct drm_connector *connector,
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
- list_for_each_entry(tmp_connector, &config->connector_list, head) {
+ drm_for_each_connector(tmp_connector, connector->dev) {
if (tmp_connector->state->crtc != crtc)
continue;
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 9b05dc76379e3..d928bf7ef2219 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -988,7 +988,7 @@ unsigned int drm_connector_index(struct drm_connector *connector)
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
- list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) {
+ drm_for_each_connector(tmp, connector->dev) {
if (tmp == connector)
return index;
@@ -1054,7 +1054,7 @@ void drm_connector_unplug_all(struct drm_device *dev)
{
struct drm_connector *connector;
- /* taking the mode config mutex ends up in a clash with sysfs */
+ /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
drm_connector_unregister(connector);
@@ -1726,7 +1726,7 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
group->id_list[group->num_crtcs + group->num_encoders++] =
encoder->base.id;
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev)
group->id_list[group->num_crtcs + group->num_encoders +
group->num_connectors++] = connector->base.id;
@@ -1810,12 +1810,13 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
* connector hot-adding. CRTC/Plane lists are invariant. */
mutex_lock(&dev->mode_config.mutex);
if (!drm_is_primary_client(file_priv)) {
+ struct drm_connector *connector;
mode_group = NULL;
list_for_each(lh, &dev->mode_config.crtc_list)
crtc_count++;
- list_for_each(lh, &dev->mode_config.connector_list)
+ drm_for_each_connector(connector, dev)
connector_count++;
list_for_each(lh, &dev->mode_config.encoder_list)
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 30254fb249fed..4a83c22f5e617 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -121,7 +121,7 @@ bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
}
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev)
if (connector->encoder == encoder)
return true;
return false;
@@ -712,7 +712,7 @@ static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
struct drm_connector *connector;
struct drm_device *dev = encoder->dev;
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev)
if (connector->encoder == encoder)
if (connector->dpms < dpms)
dpms = connector->dpms;
@@ -746,7 +746,7 @@ static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
struct drm_connector *connector;
struct drm_device *dev = crtc->dev;
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev)
if (connector->encoder && connector->encoder->crtc == crtc)
if (connector->dpms < dpms)
dpms = connector->dpms;
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 7087da37dae0b..e6e05bb75a771 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3413,7 +3413,7 @@ struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev)
if (connector->encoder == encoder && connector->eld[0])
return connector;
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
index 2f0ed11024eb8..7e1cde803bf30 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -91,13 +91,14 @@ static int get_connectors_for_crtc(struct drm_crtc *crtc,
*/
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_for_each_connector(connector, dev) {
if (connector->encoder && connector->encoder->crtc == crtc) {
if (connector_list != NULL && count < num_connectors)
*(connector_list++) = connector;
count++;
}
+ }
return count;
}