search for: get_mst_branch_device_by_guid_help

...rs/gpu/drm/drm_dp_mst_topology.c index 43452872efad..b44d3696c09a 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2060,7 +2060,7 @@ static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( struct drm_dp_mst_branch *mstb, - uint8_t *guid) + const uint8_t *guid) { struct drm_dp_mst_branch *found_mstb; struct drm_dp_mst_port *port; @@ -2084,7 +2084,7 @@ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( static struct drm_dp_mst_branch * drm_dp_get_mst_b...

..._dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_ } } } - kref_get(&mstb->kref); + ret = drm_dp_mst_topology_try_get_mstb(mstb); + if (!ret) + mstb = NULL; out: mutex_unlock(&mgr->lock); return mstb; @@ -1333,19 +1668,22 @@ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( return NULL; } -static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( - struct drm_dp_mst_topology_mgr *mgr, - uint8_t *guid) +static struct drm_dp_mst_branch * +drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr, + uint8_t *guid) { struct d...

...drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_ } } } - kref_get(&mstb->kref); + ret = drm_dp_mst_topology_get_mstb(mstb); + if (!ret) + mstb = NULL; out: mutex_unlock(&mgr->lock); return mstb; @@ -1325,19 +1574,22 @@ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( return NULL; } -static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( - struct drm_dp_mst_topology_mgr *mgr, - uint8_t *guid) +static struct drm_dp_mst_branch * +drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr, + uint8_t *guid) { struct d...

...drm_dp_mst_ > } > } > } > - kref_get(&mstb->kref); > + ret = drm_dp_mst_topology_get_mstb(mstb); > + if (!ret) > + mstb = NULL; > out: > mutex_unlock(&mgr->lock); > return mstb; > @@ -1325,19 +1574,22 @@ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( > return NULL; > } > > -static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( > - struct drm_dp_mst_topology_mgr *mgr, > - uint8_t *guid) > +static struct drm_dp_mst_branch * > +drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr...

...> > + ret = drm_dp_mst_topology_get_mstb(mstb); > > > + if (!ret) > > > + mstb = NULL; > > > out: > > > mutex_unlock(&mgr->lock); > > > return mstb; > > > @@ -1325,19 +1574,22 @@ static struct drm_dp_mst_branch > > > *get_mst_branch_device_by_guid_helper( > > > return NULL; > > > } > > > > > > -static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( > > > - struct drm_dp_mst_topology_mgr *mgr, > > > - uint8_t *guid) > > > +static struct drm_dp_mst_branch * > &gt...

...t; - kref_get(&mstb->kref); > > + ret = drm_dp_mst_topology_get_mstb(mstb); > > + if (!ret) > > + mstb = NULL; > > out: > > mutex_unlock(&mgr->lock); > > return mstb; > > @@ -1325,19 +1574,22 @@ static struct drm_dp_mst_branch > > *get_mst_branch_device_by_guid_helper( > > return NULL; > > } > > > > -static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( > > - struct drm_dp_mst_topology_mgr *mgr, > > - uint8_t *guid) > > +static struct drm_dp_mst_branch * > > +drm_dp_get_mst_branch_device_by_...

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

..._unlock(&mgr->lock); return mstb; @@ -1344,14 +1675,17 @@ drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr, uint8_t *guid) { struct drm_dp_mst_branch *mstb; + int ret; /* find the port by iterating down */ mutex_lock(&mgr->lock); mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid); - - if (mstb) - kref_get(&mstb->kref); + if (mstb) { + ret = drm_dp_mst_topology_try_get_mstb(mstb); + if (!ret) + mstb = NULL; + } mutex_unlock(&mgr->lock); return mstb; @@ -1390,11 +1724,14 @@ static void drm_dp_mst_link_probe_work(struct wor...

This is a WIP version of the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

This is the series I've been working on for a while now to get all of the atomic DRM drivers in the tree to use the atomic MST helpers, and to make the atomic MST helpers actually idempotent. Turns out it's a lot more difficult to do that without also fixing how port and branch device refcounting works so that it actually makes sense, since the current upstream implementation requires a

This is the large series for adding MST suspend/resume reprobing that I've been working on for quite a while now. In addition, I: - Refactored and cleaned up any code I ended up digging through in the process of understanding how some parts of these helpers worked. - Added some debugging tools along the way that I ended up needing to figure out some issues in my own code Note that