diff options
Diffstat (limited to 'drivers/dma-buf/dma-fence.c')
| -rw-r--r-- | drivers/dma-buf/dma-fence.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 0212af7997d9..d195d617076d 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -22,12 +22,14 @@ #include <linux/export.h> #include <linux/atomic.h> #include <linux/dma-fence.h> +#include <linux/sched/signal.h> #define CREATE_TRACE_POINTS #include <trace/events/dma_fence.h> EXPORT_TRACEPOINT_SYMBOL(dma_fence_annotate_wait_on); EXPORT_TRACEPOINT_SYMBOL(dma_fence_emit); +EXPORT_TRACEPOINT_SYMBOL(dma_fence_enable_signal); /* * fence context counter: each execution context should have its own @@ -282,6 +284,31 @@ 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 @@ -541,6 +568,7 @@ dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, fence->context = context; fence->seqno = seqno; fence->flags = 0UL; + fence->error = 0; trace_dma_fence_init(fence); } |