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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-06-14 14:01:30 +0200 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-06-14 14:01:30 +0200 |
| commit | c080e26edc3a2a3cdfa4c430c663ee1c3bbd8fae (patch) | |
| tree | 218ba0a4f52a1dbc790af46f5a8bf18afd6372fe /arch | |
| parent | fdb1117325ad719dc39e81209bc622d511db70e0 (diff) | |
| download | linux-3.10-c080e26edc3a2a3cdfa4c430c663ee1c3bbd8fae.tar.gz linux-3.10-c080e26edc3a2a3cdfa4c430c663ee1c3bbd8fae.tar.bz2 linux-3.10-c080e26edc3a2a3cdfa4c430c663ee1c3bbd8fae.zip | |
x86: dma-mapping: fix broken allocation when dma_mask has been provided
Commit 0a2b9a6ea93 ("X86: integrate CMA with DMA-mapping subsystem")
broke memory allocation with dma_mask. This patch fixes possible kernel
ops caused by lack of resetting page variable when jumping to 'again' label.
Reported-by: Konrad Rzeszutek Wilk <konrad@darnok.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 62c9457ccd2..c0f420f76cd 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -100,7 +100,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, struct dma_attrs *attrs) { unsigned long dma_mask; - struct page *page = NULL; + struct page *page; unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; dma_addr_t addr; @@ -108,6 +108,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, flag |= __GFP_ZERO; again: + page = NULL; if (!(flag & GFP_ATOMIC)) page = dma_alloc_from_contiguous(dev, count, get_order(size)); if (!page) |