From a1da439cc0d929891f0f7372c9e03530c809068c Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Wed, 5 Dec 2018 11:14:01 +0100 Subject: dma-mapping: fix lack of DMA address assignment in generic remap allocator Commit bfd56cd60521 ("dma-mapping: support highmem in the generic remap allocator") replaced dma_direct_alloc_pages() with __dma_direct_alloc_pages(), which doesn't set dma_handle and zero allocated memory. Fix it by doing this directly in the caller function. Fixes: bfd56cd60521 ("dma-mapping: support highmem in the generic remap allocator") Signed-off-by: Marek Szyprowski Tested-by: Thierry Reding Signed-off-by: Christoph Hellwig --- kernel/dma/remap.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'kernel/dma') diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index 68a64e3ff6a1..8a44317cfc1a 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -223,8 +223,14 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, ret = dma_common_contiguous_remap(page, size, VM_USERMAP, arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs), __builtin_return_address(0)); - if (!ret) + if (!ret) { __dma_direct_free_pages(dev, size, page); + return ret; + } + + *dma_handle = phys_to_dma(dev, page_to_phys(page)); + memset(ret, 0, size); + return ret; } -- cgit v1.2.3