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Wed, 5 Dec 2018 10:14:13 +0000 (GMT) Received: from AMDC2765.digital.local ([106.116.147.25]) by eusync3.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0PJ900G82DRLDG70@eusync3.samsung.com>; Wed, 05 Dec 2018 10:14:13 +0000 (GMT) From: Marek Szyprowski To: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Catalin Marinas , Will Deacon , Guo Ren , Laura Abbott , linux-arm-kernel@lists.infradead.org Subject: [PATCH] dma-mapping: fix lack of DMA address assignment in generic remap allocator Date: Wed, 05 Dec 2018 11:14:01 +0100 Message-id: <20181205101401.3561-1-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-reply-to: <20181204142304.GC2618@lst.de> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrMIsWRmVeSWpSXmKPExsWy7djPc7rflrDHGLy6L2vxflkPo8XK1UeZ LBbst7ZYuecHk8Wmx9dYLS7vmsNmsfbIXXaLv0cDLQ5+eMJq8fLjCRYHLo8189YwenT9mMHq sXlJvcfkG8sZPXbfbGDzeL/vKptH35ZVjB6fN8kFcERx2aSk5mSWpRbp2yVwZZxa3MxecJuj 4v9xjwbG5exdjJwcEgImEpOfXWHsYuTiEBJYwSjxd/8tFgjnM6PEjOXvmWCqNk/ZzAxiCwks Y5SYNqEcoqiBSWL19QZGkASbgKFE19suti5GDg4RASeJyzMVQGqYBTYwSXye+JQFpEZYIFbi 9u9+sKEsAqoSz36dBbN5BWwk/q9/xgaxTF5i9YYDYMs4BbQlVrbvBbtIQmADm8T9LRNYIYpc JE5+OQj1g7DEq+NboGwZic6Og0wQDc2MEu0zZrFDOD2MElvn7IBaYS1x+PhFsEnMAnwSk7ZN ZwY5W0KAV6KjTQiixENizrpGdoiX6ySOHtvGOoFRcgEjwypG8dTS4tz01GLDvNRyveLE3OLS vHS95PzcTYzAqD397/inHYxfLyUdYhTgYFTi4ZWYwhYjxJpYVlyZe4hRgoNZSYR3hQ17jBBv SmJlVWpRfnxRaU5q8SFGaQ4WJXHeaoYH0UIC6YklqdmpqQWpRTBZJg5OqQZGVWcx122spqu+ diUqddlsKp/pb6ziwKv7oTiTM2LFKuFXyz+2bgrWE9Kf2jZxhblR74rpjL3FrKmB+1c/XPos VF/sxAHunYcy37ldZHj244Xv1dvtgqsn1q0q2Vi1qcct8OKt+0eDf1b55p+oLitkPMOssSDF Lebhtr8/N/kkfTePiLCaW/ZLiaU4I9FQi7moOBEAkJVs1dYCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrALMWRmVeSWpSXmKPExsVy+t/xq7pfl7DHGFyeq2nxflkPo8XK1UeZ LBbst7ZYuecHk8Wmx9dYLS7vmsNmsfbIXXaLv0cDLQ5+eMJq8fLjCRYHLo8189YwenT9mMHq sXlJvcfkG8sZPXbfbGDzeL/vKptH35ZVjB6fN8kFcERx2aSk5mSWpRbp2yVwZZxa3MxecJuj 4v9xjwbG5exdjJwcEgImEpunbGbuYuTiEBJYwihx/+FpJginiUli/+JvzCBVbAKGEl1vu9i6 GDk4RAScJC7PVACpYRbYwCTx485JsEnCArESt3/3M4HYLAKqEs9+nQWzeQVsJP6vf8YGsU1e YvWGA2AzOQW0JVa272UBmSkkoCVx763wBEaeBYwMqxhFUkuLc9Nziw31ihNzi0vz0vWS83M3 MQLDbduxn5t3MF7aGHyIUYCDUYmHV3IKW4wQa2JZcWXuIUYJDmYlEd4VNuwxQrwpiZVVqUX5 8UWlOanFhxilOViUxHnPG1RGCQmkJ5akZqemFqQWwWSZODilGhhj11pH7P6felspcbbImRum Fu83r3rJ28R32VW1//r0VHVf9qA3K+xsY35cXbCW42/SBwe92W8kpARsj2y/cLQ2XcYpO7bN ze3T74OXtU+3WP2T/T6J60muz8m3k7Z9fyzkNe3CWfEO99YWcaltt/TZuw0DlrAne0Xcyf3R krmh4ZDR1M2lbI+VWIozEg21mIuKEwGHTg7zMwIAAA== X-CMS-MailID: 20181205101414eucas1p2fdde1c06ad6352293980b94b86b022f9 X-Msg-Generator: CA CMS-TYPE: 201P X-CMS-RootMailID: 20181205101414eucas1p2fdde1c06ad6352293980b94b86b022f9 References: <20181204142304.GC2618@lst.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- kernel/dma/remap.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) 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; } -- 2.17.1