From: Andy Shevchenko Date: Mon, 1 Oct 2012 10:06:25 +0000 (+0300) Subject: dw_dmac: fix a regression in dwc_prep_dma_memcpy X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3d4f860583bf4aa55dd5c6d5ba6ccf1f25fb473a;p=linux-beck.git dw_dmac: fix a regression in dwc_prep_dma_memcpy Sometimes memory-to-memory test is failed, that's why we need to choose minimum data portion between source and destination limits together. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 9ca9ca41b83e..c4b0eb3cde81 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -716,6 +716,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, size_t offset; unsigned int src_width; unsigned int dst_width; + unsigned int data_width; u32 ctllo; dev_vdbg(chan2dev(chan), @@ -728,11 +729,11 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, return NULL; } - src_width = min_t(unsigned int, dwc->dw->data_width[dwc_get_sms(dws)], - dwc_fast_fls(src | len)); + data_width = min_t(unsigned int, dwc->dw->data_width[dwc_get_sms(dws)], + dwc->dw->data_width[dwc_get_dms(dws)]); - dst_width = min_t(unsigned int, dwc->dw->data_width[dwc_get_dms(dws)], - dwc_fast_fls(dest | len)); + src_width = dst_width = min_t(unsigned int, data_width, + dwc_fast_fls(src | dest | len)); ctllo = DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_DST_WIDTH(dst_width)