| Message ID | 20181130132231.16512-22-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/23] dma-mapping: provide a generic DMA_MAPPING_ERROR | expand |
On Fri, Nov 30, 2018 at 02:22:29PM +0100, Christoph Hellwig wrote: > Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let > the core dma-mapping code handle the rest. > > Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Konrad Rzeszutek Wilk <konrad@darnok.org> > --- > drivers/xen/swiotlb-xen.c | 12 ++---------- > 1 file changed, 2 insertions(+), 10 deletions(-) > > diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c > index 2a7f545bd0b5..6dc969d5ea2f 100644 > --- a/drivers/xen/swiotlb-xen.c > +++ b/drivers/xen/swiotlb-xen.c > @@ -53,8 +53,6 @@ > * API. > */ > > -#define XEN_SWIOTLB_ERROR_CODE (~(dma_addr_t)0x0) > - > static char *xen_io_tlb_start, *xen_io_tlb_end; > static unsigned long xen_io_tlb_nslabs; > /* > @@ -406,7 +404,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, > map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, size, dir, > attrs); > if (map == SWIOTLB_MAP_ERROR) > - return XEN_SWIOTLB_ERROR_CODE; > + return DMA_MAPPING_ERROR; > > dev_addr = xen_phys_to_bus(map); > xen_dma_map_page(dev, pfn_to_page(map >> PAGE_SHIFT), > @@ -421,7 +419,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, > attrs |= DMA_ATTR_SKIP_CPU_SYNC; > swiotlb_tbl_unmap_single(dev, map, size, dir, attrs); > > - return XEN_SWIOTLB_ERROR_CODE; > + return DMA_MAPPING_ERROR; > } > > /* > @@ -700,11 +698,6 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt, > return dma_common_get_sgtable(dev, sgt, cpu_addr, handle, size, attrs); > } > > -static int xen_swiotlb_mapping_error(struct device *dev, dma_addr_t dma_addr) > -{ > - return dma_addr == XEN_SWIOTLB_ERROR_CODE; > -} > - > const struct dma_map_ops xen_swiotlb_dma_ops = { > .alloc = xen_swiotlb_alloc_coherent, > .free = xen_swiotlb_free_coherent, > @@ -719,5 +712,4 @@ const struct dma_map_ops xen_swiotlb_dma_ops = { > .dma_supported = xen_swiotlb_dma_supported, > .mmap = xen_swiotlb_dma_mmap, > .get_sgtable = xen_swiotlb_get_sgtable, > - .mapping_error = xen_swiotlb_mapping_error, > }; > -- > 2.19.1 >
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 2a7f545bd0b5..6dc969d5ea2f 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -53,8 +53,6 @@ * API. */ -#define XEN_SWIOTLB_ERROR_CODE (~(dma_addr_t)0x0) - static char *xen_io_tlb_start, *xen_io_tlb_end; static unsigned long xen_io_tlb_nslabs; /* @@ -406,7 +404,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, size, dir, attrs); if (map == SWIOTLB_MAP_ERROR) - return XEN_SWIOTLB_ERROR_CODE; + return DMA_MAPPING_ERROR; dev_addr = xen_phys_to_bus(map); xen_dma_map_page(dev, pfn_to_page(map >> PAGE_SHIFT), @@ -421,7 +419,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, attrs |= DMA_ATTR_SKIP_CPU_SYNC; swiotlb_tbl_unmap_single(dev, map, size, dir, attrs); - return XEN_SWIOTLB_ERROR_CODE; + return DMA_MAPPING_ERROR; } /* @@ -700,11 +698,6 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt, return dma_common_get_sgtable(dev, sgt, cpu_addr, handle, size, attrs); } -static int xen_swiotlb_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return dma_addr == XEN_SWIOTLB_ERROR_CODE; -} - const struct dma_map_ops xen_swiotlb_dma_ops = { .alloc = xen_swiotlb_alloc_coherent, .free = xen_swiotlb_free_coherent, @@ -719,5 +712,4 @@ const struct dma_map_ops xen_swiotlb_dma_ops = { .dma_supported = xen_swiotlb_dma_supported, .mmap = xen_swiotlb_dma_mmap, .get_sgtable = xen_swiotlb_get_sgtable, - .mapping_error = xen_swiotlb_mapping_error, };
Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let the core dma-mapping code handle the rest. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/xen/swiotlb-xen.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-)