Commit ef10b0b2 authored Dec 02, 2015 by Sylvain ETIENNE Committed by Vinod Koul Dec 05, 2015

dmaengine: at_xdmac: fix bad behavior in interleaved mode



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@ingenico.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: 4e538578 ("dmaengine: at_xdmac: handle numf > 1")
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent f5a00eb7

drivers/dma/at_xdmac.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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",

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