[PATCH v4 14/15] dmaengine: dw-edma: Revert fix scatter-gather address calculation
From: Gustavo Pimentel <hidden>
Date: 2021-02-03 22:01:41
Also in:
linux-pci, lkml
Subsystem:
designware edma core ip driver, dma generic offload engine subsystem, the rest · Maintainers:
Manivannan Sadhasivam, Vinod Koul, Linus Torvalds
Reverting the applied patch because it caused a regression on ARC700 platform (32 bits). Signed-off-by: Gustavo Pimentel <redacted> --- drivers/dma/dw-edma/dw-edma-core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index a299eed..c198451 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c@@ -429,7 +429,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer) if (xfer->type == EDMA_XFER_CYCLIC) { burst->dar = xfer->xfer.cyclic.paddr; } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) { - burst->dar = dst_addr; + src_addr += sg_dma_len(sg); + burst->dar = sg_dma_address(sg); /* Unlike the typical assumption by other * drivers/IPs the peripheral memory isn't * a FIFO memory, in this case, it's a
@@ -443,7 +444,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer) if (xfer->type == EDMA_XFER_CYCLIC) { burst->sar = xfer->xfer.cyclic.paddr; } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) { - burst->sar = src_addr; + dst_addr += sg_dma_len(sg); + burst->sar = sg_dma_address(sg); /* Unlike the typical assumption by other * drivers/IPs the peripheral memory isn't * a FIFO memory, in this case, it's a
@@ -455,8 +457,6 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer) } if (xfer->type == EDMA_XFER_SCATTER_GATHER) { - src_addr += sg_dma_len(sg); - dst_addr += sg_dma_len(sg); sg = sg_next(sg); } else if (xfer->type == EDMA_XFER_INTERLEAVED && xfer->xfer.il->frame_size > 0) {
--
2.7.4