From cdd7104850d34cfe22902c45d69dac6cb506b087 Mon Sep 17 00:00:00 2001 From: Jae Hyun Yoo Date: Fri, 26 Feb 2021 11:00:54 -0800 Subject: [PATCH] Add a quick fix to resolve USB gadget DMA issue. This is a quick fix to resolve USB gadget DMA issue and it should be removed when a real fix is added. Tested: Keyboard and mouse in KVM feature worked. Signed-off-by: Jae Hyun Yoo --- kernel/dma/mapping.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 51bb8fa8eb89..7bcfedeb1e30 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -146,8 +146,10 @@ dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, BUG_ON(!valid_dma_direction(dir)); +#if 0 /* Quick fix to resolve USB gadget issue */ if (WARN_ON_ONCE(!dev->dma_mask)) return DMA_MAPPING_ERROR; +#endif if (dma_map_direct(dev, ops)) addr = dma_direct_map_page(dev, page, offset, size, dir, attrs); -- 2.17.1