Commit 30183777 authored Mar 11, 2016 by Vinayak Menon Committed by Gerrit - the friendly Code Review server Nov 29, 2019

arm/arm64: dma-mapping: flush the tlb on unremap



Make sure there are no stale tlb entries when
dma_unremap returns, thus preventing speculative
fetches.

Change-Id: I22070de282f25fe5ea20177e67a6d629123e29a4
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Ramesh Gupta Guntha <rgguntha@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>
Signed-off-by: Qingqing Zhou <qqzhou@codeaurora.org>

parent 1beb770c

arch/arm/mm/dma-mapping.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -926,6 +926,8 @@ static void arm_dma_unremap(struct device dev, void remapped_addr,
		}

		vunmap(remapped_addr);
		flush_tlb_kernel_range((unsigned long)remapped_addr,
		(unsigned long)(remapped_addr + size));
		}
		/*
		* Create userspace mapping for the DMA-coherent memory.