From: Serge Semin Sergey.Semin@baikalelectronics.ru
[ Upstream commit 5fdca4a995bcd4cf61bda40af154a730589dc524 ]
Previously, readq_ch() did a 64-bit readq(), but truncated the result by storing it in the u32 "value". Change "value" to u64 to avoid the truncation.
Note: the method is currently unused, so the bug hasn't caused any problem so far.
Fixes: 04e0a39fc10f ("dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures") Signed-off-by: Serge Semin Sergey.Semin@baikalelectronics.ru Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/dw-edma/dw-edma-v0-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index b5b8f8181e776..043a4f3115fa3 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -192,7 +192,7 @@ static inline void writeq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch, static inline u64 readq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch, const void __iomem *addr) { - u32 value; + u64 value;
if (dw->mf == EDMA_MF_EDMA_LEGACY) { u32 viewport_sel;