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 <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 9ca9ca4..c4b0eb3c 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -716,6 +716,7 @@
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 @@
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)