Messages in this thread Patch in this message | | | From | Cyrille Pitchen <> | Subject | [PATCH 1/1] dmaengine: at_xdmac: fix at_xdmac_prep_dma_memcpy() | Date | Mon, 7 Dec 2015 15:58:56 +0100 |
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This patch fixes at_xdmac_prep_dma_memcpy(). Indeed the data width field of the Channel Configuration register was not updated properly in the loop: the bits of the dwidth field were not cleared before adding their new value.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> --- drivers/dma/at_xdmac.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 90040e99f5f3..39f59666f93f 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -1096,6 +1096,7 @@ at_xdmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, /* Check remaining length and change data width if needed. */ dwidth = at_xdmac_align_width(chan, src_addr | dst_addr | xfer_size); + chan_cc &= ~AT_XDMAC_CC_DWIDTH_MASK; chan_cc |= AT_XDMAC_CC_DWIDTH(dwidth); ublen = xfer_size >> dwidth; -- 1.8.2.2
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