[PATCH V8 1/6] csky/dma: bugfix dma_sync_for_cpu/device
From: Guo Ren <hidden>
Date: 2018-09-20 05:39:55
Also in:
linux-arch, lkml
Subsystem:
c-sky architecture, the rest · Maintainers:
Guo Ren, Linus Torvalds
ref: https://lkml.org/lkml/2018/5/18/1068 map for_cpu for_device unmap TO_DEV writeback none writeback none TO_CPU invalidate invalidate* invalidate invalidate* BIDIR writeback invalidate writeback invalidate Signed-off-by: Guo Ren <redacted> --- arch/csky/mm/dma-mapping.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c
index 16c2087..30a2041 100644
--- a/arch/csky/mm/dma-mapping.c
+++ b/arch/csky/mm/dma-mapping.c@@ -217,7 +217,8 @@ void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, break; case DMA_FROM_DEVICE: case DMA_BIDIRECTIONAL: - BUG(); + dma_wbinv_range(vaddr + offset, vaddr + offset + size); + break; default: BUG(); }
@@ -240,7 +241,7 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, switch (dir) { case DMA_TO_DEVICE: - BUG(); + break; case DMA_FROM_DEVICE: case DMA_BIDIRECTIONAL: dma_wbinv_range(vaddr + offset, vaddr + offset + size);
--
2.7.4