diff options
author | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-04-07 21:25:10 +0200 |
---|---|---|
committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-04-07 21:25:10 +0200 |
commit | a8d4d71c41ff0158c2026cac5981e39702167da9 (patch) | |
tree | 0c54ec3eb59f5bab6aa7318d14c92ff875412202 /target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch | |
parent | 59e0e88c22007fd77ee9c6c8e02a689889a5f597 (diff) | |
download | mtk-20170518-a8d4d71c41ff0158c2026cac5981e39702167da9.zip mtk-20170518-a8d4d71c41ff0158c2026cac5981e39702167da9.tar.gz mtk-20170518-a8d4d71c41ff0158c2026cac5981e39702167da9.tar.bz2 |
brcm2708: update to latest version
As usual these patches were extracted from the raspberry pi repo:
https://github.com/raspberrypi/linux/commits/rpi-4.4.y
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch b/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch deleted file mode 100644 index 064e117..0000000 --- a/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch +++ /dev/null @@ -1,74 +0,0 @@ -From f1924e632d16f98eee1fe1be636249b8cee4ee6e Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Mon, 19 Oct 2015 08:44:35 -0700 -Subject: [PATCH 097/170] drm/vc4: Drop struct_mutex around CL validation. - -We were using it so that we could make sure that shader validation -state didn't change while we were validating, but now shader -validation state is immutable. The bcl/rcl generation doesn't do any -other BO dereferencing, and seems to have no other global state -dependency not covered by job_lock / bo_lock. We only need to hold -struct_mutex for object unreferencing. - -Fixes a lock order reversal between mmap_sem and struct_mutex. - -Signed-off-by: Eric Anholt <eric@anholt.net> ---- - drivers/gpu/drm/vc4/vc4_gem.c | 13 ++++++------- - 1 file changed, 6 insertions(+), 7 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_gem.c -+++ b/drivers/gpu/drm/vc4/vc4_gem.c -@@ -439,10 +439,12 @@ fail: - } - - static void --vc4_complete_exec(struct vc4_exec_info *exec) -+vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec) - { - unsigned i; - -+ /* Need the struct lock for drm_gem_object_unreference(). */ -+ mutex_lock(&dev->struct_mutex); - if (exec->bo) { - for (i = 0; i < exec->bo_count; i++) - drm_gem_object_unreference(&exec->bo[i].bo->base); -@@ -455,6 +457,7 @@ vc4_complete_exec(struct vc4_exec_info * - list_del(&bo->unref_head); - drm_gem_object_unreference(&bo->base.base); - } -+ mutex_unlock(&dev->struct_mutex); - - kfree(exec); - } -@@ -473,7 +476,7 @@ vc4_job_handle_completed(struct vc4_dev - list_del(&exec->head); - - spin_unlock_irqrestore(&vc4->job_lock, irqflags); -- vc4_complete_exec(exec); -+ vc4_complete_exec(vc4->dev, exec); - spin_lock_irqsave(&vc4->job_lock, irqflags); - } - -@@ -525,12 +528,8 @@ vc4_job_done_work(struct work_struct *wo - { - struct vc4_dev *vc4 = - container_of(work, struct vc4_dev, job_done_work); -- struct drm_device *dev = vc4->dev; - -- /* Need the struct lock for drm_gem_object_unreference(). */ -- mutex_lock(&dev->struct_mutex); - vc4_job_handle_completed(vc4); -- mutex_unlock(&dev->struct_mutex); - } - - static int -@@ -639,7 +638,7 @@ vc4_submit_cl_ioctl(struct drm_device *d - return 0; - - fail: -- vc4_complete_exec(exec); -+ vc4_complete_exec(vc4->dev, exec); - - return ret; - } |