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freedreno: serialize drmPrimeFDToHandle under table_lock

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fixes the prime sharing race condition described by
"intel: Serialize drmPrimeFDToHandle with struct_mutex".

we inline fd_bo_from_handle() into fd_bo_from_dmabuf() and allow locking.

Signed-off-by: Varad Gautam <varadgautam@gmail.com>
Signed-off-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Varad Gautam 2015-08-30 15:30:58 +05:30 • committed by Rob Clark
parent cc7db673fa
commit c3301d0134
1 changed files with 9 additions and 1 deletions
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10
freedreno/freedreno_bo.c
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@ -230,18 +230,26 @@ fd_bo_from_dmabuf(struct fd_device *dev, int fd)
uint32_t handle;
struct fd_bo *bo;
pthread_mutex_lock(&table_lock);
ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
if (ret) {
return NULL;
}
bo = lookup_bo(dev->handle_table, handle);
if (bo)
goto out_unlock;
/* lseek() to get bo size */
size = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_CUR);
bo = fd_bo_from_handle(dev, handle, size);
bo = bo_from_handle(dev, size, handle);
bo->fd = fd;
out_unlock:
pthread_mutex_unlock(&table_lock);
return bo;
}