anv: Lock around fetching sync file FDs from semaphores
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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@ -1598,20 +1598,15 @@ VkResult anv_GetSemaphoreFdKHR(
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return result;
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break;
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case ANV_SEMAPHORE_TYPE_SYNC_FILE:
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/* There are two reasons why this could happen:
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*
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* 1) The user is trying to export without submitting something that
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* signals the semaphore. If this is the case, it's their bug so
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* what we return here doesn't matter.
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*
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* 2) The kernel didn't give us a file descriptor. The most likely
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* reason for this is running out of file descriptors.
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case ANV_SEMAPHORE_TYPE_SYNC_FILE: {
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/* There's a potential race here with vkQueueSubmit if you are trying
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* to export a semaphore Fd while the queue submit is still happening.
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* This can happen if we see all dependencies get resolved via timeline
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* semaphore waits completing before the execbuf completes and we
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* process the resulting out fence. To work around this, take a lock
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* around grabbing the fd.
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*/
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if (impl->fd < 0)
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return vk_error(VK_ERROR_TOO_MANY_OBJECTS);
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*pFd = impl->fd;
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pthread_mutex_lock(&device->mutex);
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/* From the Vulkan 1.0.53 spec:
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*
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@ -1623,8 +1618,26 @@ VkResult anv_GetSemaphoreFdKHR(
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* considered to have been waited on and no longer has a sync file
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* attached.
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*/
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int fd = impl->fd;
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impl->fd = -1;
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pthread_mutex_unlock(&device->mutex);
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/* There are two reasons why this could happen:
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*
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* 1) The user is trying to export without submitting something that
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* signals the semaphore. If this is the case, it's their bug so
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* what we return here doesn't matter.
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*
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* 2) The kernel didn't give us a file descriptor. The most likely
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* reason for this is running out of file descriptors.
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*/
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if (fd < 0)
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return vk_error(VK_ERROR_TOO_MANY_OBJECTS);
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*pFd = fd;
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return VK_SUCCESS;
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}
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case ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ:
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if (pGetFdInfo->handleType == VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT)
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