diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-04 14:12:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-09 22:01:56 +0100 |
| commit | d3b029a44e14f5226fd9b410a0a70eb9b7ed6beb (patch) | |
| tree | 49b3c37d047ca555b14b04d94f593f0c86aa14cf /include | |
| parent | f55d17e9c3af7bf2fdb38c52a9abe4d4cfc0137c (diff) | |
dma-fence: Wrap querying the fence->status
commit d6c99f4bf093a58d3ab47caaec74b81f18bc4e3f upstream.
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
[s/dma_fence/fence/g - gregkh]
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fence.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/fence.h b/include/linux/fence.h index fcb69f99d717..2dfed6957b61 100644 --- a/include/linux/fence.h +++ b/include/linux/fence.h @@ -334,6 +334,30 @@ static inline struct fence *fence_later(struct fence *f1, struct fence *f2) return fence_is_signaled(f2) ? NULL : f2; } +/** + * fence_get_status_locked - returns the status upon completion + * @fence: [in] the fence to query + * + * Drivers can supply an optional error status condition before they signal + * the fence (to indicate whether the fence was completed due to an error + * rather than success). The value of the status condition is only valid + * if the fence has been signaled, fence_get_status_locked() first checks + * the signal state before reporting the error status. + * + * 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. + */ +static inline int fence_get_status_locked(struct fence *fence) +{ + if (fence_is_signaled_locked(fence)) + return fence->status < 0 ? fence->status : 1; + else + return 0; +} + +int fence_get_status(struct fence *fence); + signed long fence_wait_timeout(struct fence *, bool intr, signed long timeout); signed long fence_wait_any_timeout(struct fence **fences, uint32_t count, bool intr, signed long timeout); |