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dma-buf: consolidate dma_fence subclass checking

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Consolidate the wrapper functions to check for dma_fence
subclasses in the dma_fence header.

This makes it easier to document and also check the different
requirements for fence containers in the subclasses.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220204100429.2049-2-christian.koenig@amd.com
This commit is contained in:
Christian König 2022-01-19 11:17:32 +01:00
parent ea181a3494
commit 976b6d97c6
3 changed files with 40 additions and 16 deletions
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15
include/linux/dma-fence-array.h
View file

@ -45,19 +45,6 @@ struct dma_fence_array {
struct irq_work work;
};
extern const struct dma_fence_ops dma_fence_array_ops;
/**
* dma_fence_is_array - check if a fence is from the array subsclass
* @fence: fence to test
*
* Return true if it is a dma_fence_array and false otherwise.
*/
static inline bool dma_fence_is_array(struct dma_fence *fence)
{
return fence->ops == &dma_fence_array_ops;
}
/**
* to_dma_fence_array - cast a fence to a dma_fence_array
* @fence: fence to cast to a dma_fence_array
@ -68,7 +55,7 @@ static inline bool dma_fence_is_array(struct dma_fence *fence)
static inline struct dma_fence_array *
to_dma_fence_array(struct dma_fence *fence)
{
if (fence->ops != &dma_fence_array_ops)
if (!fence || !dma_fence_is_array(fence))
return NULL;
return container_of(fence, struct dma_fence_array, base);