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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-04 14:12:21 +0000 |
|---|---|---|
| committer |   Sumit Semwal <sumit.semwal@linaro.org> | 2017-01-09 20:06:58 +0530 |
| commit | d6c99f4bf093a58d3ab47caaec74b81f18bc4e3f (patch) | |
| tree | 246eff35230c79ce6560cf7fe23ce453a6ed62bb /drivers/dma-buf/dma-fence.c | |
| parent | dma-fence: Clear fence->status during dma_fence_init() (diff) | |
| download | linux-dev-d6c99f4bf093a58d3ab47caaec74b81f18bc4e3f.tar.xz linux-dev-d6c99f4bf093a58d3ab47caaec74b81f18bc4e3f.zip | |
dma-fence: Wrap querying the fence->status
The fence->status is an optional field that is only valid once the fence
has been signaled. (Driver may fill the fence->status with an error code
prior to calling dma_fence_signal().) Given the restriction upon its
validity, wrap querying of the fence->status into a helper
dma_fence_get_status().
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170104141222.6992-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/dma-buf/dma-fence.c')
| -rw-r--r-- | drivers/dma-buf/dma-fence.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index cb6eef308cd9..5e66dfece03c 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -282,6 +282,31 @@ int dma_fence_add_callback(struct dma_fence *fence, struct dma_fence_cb *cb, EXPORT_SYMBOL(dma_fence_add_callback); /** + * dma_fence_get_status - returns the status upon completion + * @fence: [in] the dma_fence to query + * + * This wraps dma_fence_get_status_locked() to return the error status + * condition on a signaled fence. See dma_fence_get_status_locked() for more + * details. + * + * Returns 0 if the fence has not yet been signaled, 1 if the fence has + * been signaled without an error condition, or a negative error code + * if the fence has been completed in err. + */ +int dma_fence_get_status(struct dma_fence *fence) +{ + unsigned long flags; + int status; + + spin_lock_irqsave(fence->lock, flags); + status = dma_fence_get_status_locked(fence); + spin_unlock_irqrestore(fence->lock, flags); + + return status; +} +EXPORT_SYMBOL(dma_fence_get_status); + +/** * dma_fence_remove_callback - remove a callback from the signaling list * @fence: [in] the fence to wait on * @cb: [in] the callback to remove |