From 404a90abc60f60df2757cb272660e003d326881f Mon Sep 17 00:00:00 2001 From: Sylwester Nawrocki Date: Thu, 8 May 2014 14:35:15 -0300 Subject: [PATCH] [media] exynos4-is: Free FIMC-IS CPU memory only when allocated Ensure dma_free_coherent() is not called with incorrect arguments and only when the memory was actually allocated. This will prevent possible crashes on error paths of the top level media device driver, when fimc-is device gets unregistered and its driver detached. Signed-off-by: Sylwester Nawrocki Acked-by: Kyungmin Park Cc: stable@vger.kernel.org # for v3.15 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/exynos4-is/fimc-is.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c index 128b73b6cce2..5476dce3ad29 100644 --- a/drivers/media/platform/exynos4-is/fimc-is.c +++ b/drivers/media/platform/exynos4-is/fimc-is.c @@ -367,6 +367,9 @@ static void fimc_is_free_cpu_memory(struct fimc_is *is) { struct device *dev = &is->pdev->dev; + if (is->memory.vaddr == NULL) + return; + dma_free_coherent(dev, is->memory.size, is->memory.vaddr, is->memory.paddr); } -- 2.34.1