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| Started by | lizf@kernel.org |
|---|---|
| First post | 2016-10-12 14:50 +0200 |
| Last post | 2016-10-13 05:00 +0200 |
| Articles | 2 — 2 participants |
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[PATCH 3.4 065/125] drm/ttm: Fixed a read/write lock imbalance lizf@kernel.org - 2016-10-12 14:50 +0200
Re: [PATCH 3.4 065/125] drm/ttm: Fixed a read/write lock imbalance Zefan Li <lizefan@huawei.com> - 2016-10-13 05:00 +0200
| From | lizf@kernel.org |
|---|---|
| Date | 2016-10-12 14:50 +0200 |
| Subject | [PATCH 3.4 065/125] drm/ttm: Fixed a read/write lock imbalance |
| Message-ID | <srr8S-4rr-21@gated-at.bofh.it> |
From: Thomas Hellstrom <thellstrom@vmware.com> 3.4.113-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 025af189fb44250206dd8a32fa4a682392af3301 upstream. In ttm_write_lock(), the uninterruptible path should call __ttm_write_lock() not __ttm_read_lock(). This fixes a vmwgfx hang on F23 start up. syeh: Extracted this from one of Thomas' internal patches. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> Signed-off-by: Zefan Li <lizefan@huawei.com> --- drivers/gpu/drm/ttm/ttm_lock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ttm/ttm_lock.c b/drivers/gpu/drm/ttm/ttm_lock.c index 075daf4..9934b4d 100644 --- a/drivers/gpu/drm/ttm/ttm_lock.c +++ b/drivers/gpu/drm/ttm/ttm_lock.c @@ -180,7 +180,7 @@ int ttm_write_lock(struct ttm_lock *lock, bool interruptible) spin_unlock(&lock->lock); } } else - wait_event(lock->queue, __ttm_read_lock(lock)); + wait_event(lock->queue, __ttm_write_lock(lock)); return ret; } -- 1.9.1
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| From | Zefan Li <lizefan@huawei.com> |
|---|---|
| Date | 2016-10-13 05:00 +0200 |
| Message-ID | <srEpr-5zA-7@gated-at.bofh.it> |
| In reply to | #1499552 |
On 2016/10/12 21:04, Thomas Hellstrom wrote: > Li, > > IIRC This one goes hand in hand with a vmwgfx (the only user) patch. > Please don't apply until I've figured out whether that patch is also in 3.4. > I'll drop it for now. Thanks!
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