From: Sylvain ETIENNE <Sylvain.ETIENNE@xxxxxxxxxxxx> When performing interleaved transfers with numf > 1, an extra line is copied. The mbr.bc field is incremented once too often. The length of the block is (BLEN+1) microblocks. Signed-off-by: Sylvain ETIENNE <Sylvain.ETIENNE@xxxxxxxxxxxx> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> Fixes: 4e5385784e69 ("dmaengine: at_xdmac: handle numf > 1") --- drivers/dma/at_xdmac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 7f039de..c8faaa5 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -965,7 +965,9 @@ at_xdmac_prep_interleaved(struct dma_chan *chan, NULL, src_addr, dst_addr, xt, xt->sgl); - for (i = 0; i < xt->numf; i++) + + /* Length of the block is (BLEN+1) microblocks. */ + for (i = 0; i < xt->numf - 1; i++) at_xdmac_increment_block_count(chan, first); dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n", -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html