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winsys/amdgpu: avoid double simple_mtx_unlock()

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pthread_mutex_unlock() when unlocked is documented by posix as
being undefined behaviour.  On OpenBSD pthread_mutex_unlock() will call
abort(3) if this happens.

This occurs in amdgpu_winsys_create() after
cb446dc0fa
winsys/amdgpu: Add amdgpu_screen_winsys

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Cc: 19.2 19.3 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Jonathan Gray
2019-11-28 16:56:30 +11:00
committed by Marek Olšák
parent 5e81fbf44a
commit 3fe3bde4f2
1 changed files with 0 additions and 1 deletions
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src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
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@@ -326,7 +326,6 @@ amdgpu_winsys_create(int fd, const struct pipe_screen_config *config,
aws = util_hash_table_get(dev_tab, dev);
if (aws) {
pipe_reference(NULL, &aws->reference);
simple_mtx_unlock(&dev_tab_mutex);
/* Release the device handle, because we don't need it anymore.
* This function is returning an existing winsys instance, which