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media: staging: imgu: Address compiler / checker warnings in MMU code

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Address C compiler, sparse and smatch warnings and little style issues in
the IMGU MMU code.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Rajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Sakari Ailus 2019-02-19 09:32:06 -05:00 committed by Mauro Carvalho Chehab
parent 0ace8734f4
commit 3efcbe3e42
1 changed files with 35 additions and 4 deletions
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39
drivers/staging/media/ipu3/ipu3-mmu.c
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@ -275,7 +275,17 @@ static size_t imgu_mmu_pgsize(unsigned long pgsize_bitmap,
return pgsize;
}
/* drivers/iommu/iommu.c/iommu_map() */
/**
* imgu_mmu_map - map a buffer to a physical address
*
* @info: MMU mappable range
* @iova: the virtual address
* @paddr: the physical address
* @size: length of the mappable area
*
* The function has been adapted from iommu_map() in
* drivers/iommu/iommu.c .
*/
int imgu_mmu_map(struct imgu_mmu_info *info, unsigned long iova,
phys_addr_t paddr, size_t size)
{
@ -321,7 +331,17 @@ int imgu_mmu_map(struct imgu_mmu_info *info, unsigned long iova,
return ret;
}
/* drivers/iommu/iommu.c/default_iommu_map_sg() */
/**
* imgu_mmu_map_sg - Map a scatterlist
*
* @info: MMU mappable range
* @iova: the virtual address
* @sg: the scatterlist to map
* @nents: number of entries in the scatterlist
*
* The function has been adapted from default_iommu_map_sg() in
* drivers/iommu/iommu.c .
*/
size_t imgu_mmu_map_sg(struct imgu_mmu_info *info, unsigned long iova,
struct scatterlist *sg, unsigned int nents)
{
@ -394,7 +414,16 @@ static size_t __imgu_mmu_unmap(struct imgu_mmu *mmu,
return unmap;
}
/* drivers/iommu/iommu.c/iommu_unmap() */
/**
* imgu_mmu_unmap - Unmap a buffer
*
* @info: MMU mappable range
* @iova: the virtual address
* @size: the length of the buffer
*
* The function has been adapted from iommu_unmap() in
* drivers/iommu/iommu.c .
*/
size_t imgu_mmu_unmap(struct imgu_mmu_info *info, unsigned long iova,
size_t size)
{
@ -444,6 +473,7 @@ size_t imgu_mmu_unmap(struct imgu_mmu_info *info, unsigned long iova,
/**
* imgu_mmu_init() - initialize IPU3 MMU block
*
* @parent: struct device parent
* @base: IOMEM base of hardware registers.
*
@ -523,7 +553,8 @@ fail_group:
/**
* imgu_mmu_exit() - clean up IPU3 MMU block
* @info: IPU3 MMU private data
*
* @info: MMU mappable range
*/
void imgu_mmu_exit(struct imgu_mmu_info *info)
{