From: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
[ Upstream commit 13b6299cf66165a442089fa895a7f70250703584 ]
Interleaved DMA transfer support was added by 85e7518f42c8 ("dmaengine:
dw-edma: Add device_prep_interleave_dma() support"), but depending on the
selected channel, either source or destination address are left
uninitialized which was obviously wrong.
Initialize the destination address of the eDMA burst descriptors for
DEV_TO_MEM interleaved operations and the source address for MEM_TO_DEV
operations.
Link: https://lore.kernel.org/r/20230113171409.30470-5-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx
Fixes: 85e7518f42c8 ("dmaengine: dw-edma: Add device_prep_interleave_dma() support")
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Acked-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/dma/dw-edma/dw-edma-core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 36b3fe1b6b0f9..97f5e4e93cfc6 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -438,6 +438,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
* and destination addresses are increased
* by the same portion (data length)
*/
+ } else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+ burst->dar = dst_addr;
}
} else {
burst->dar = dst_addr;
@@ -453,6 +455,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
* and destination addresses are increased
* by the same portion (data length)
*/
+ } else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+ burst->sar = src_addr;
}
}
--
2.39.2
