From: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
DMA is always enabled before calling axi_chan_block_xfer_start(),
so it does not need to be enabled again here.
Re-enabling DMA causes random failures in the dmatest test when running
multiple iterations.
e.g.
[ 29.600722] dmatest: dma0chan2-copy0: summary 100 tests, 1 failures 160.26 iops 1299 KB/s (0)
Fixes: 1fe20f1b8454 ("dmaengine: Introduce DW AXI DMAC driver")
Tested-by :Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
---
Changes in v4:
* Add fixes tag
* Rebase to v6.14-rc1
link to v3:
- https://lore.kernel.org/all/20230521101216.4084-4-jszhang@xxxxxxxxxx/
drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index b23536645ff7..43d30c7b8f03 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -435,8 +435,6 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
return;
}
- axi_dma_enable(chan->chip);
-
config.dst_multblk_type = DWAXIDMAC_MBLK_TYPE_LL;
config.src_multblk_type = DWAXIDMAC_MBLK_TYPE_LL;
config.tt_fc = DWAXIDMAC_TT_FC_MEM_TO_MEM_DMAC;
--
2.25.1
