From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 39416677b95bf1ab8bbfa229ec7e511c96ad5d0c upstream.
We replace __fls() by __ffs() since we have to find a *minimum* data width that
satisfies both source and destination.
While here, rename dwc_fast_fls() to dwc_fast_ffs() which it really is.
Fixes: 4c2d56c574db (dw_dmac: introduce dwc_fast_fls())
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/dma/dw/core.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index c128aab076ab..fe083015a354 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -180,7 +180,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
/*----------------------------------------------------------------------*/
-static inline unsigned int dwc_fast_fls(unsigned long long v)
+static inline unsigned int dwc_fast_ffs(unsigned long long v)
{
/*
* We can be a lot more clever here, but this should take care
@@ -744,7 +744,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
dw->data_width[dwc->dst_master]);
src_width = dst_width = min_t(unsigned int, data_width,
- dwc_fast_fls(src | dest | len));
+ dwc_fast_ffs(src | dest | len));
ctllo = DWC_DEFAULT_CTLLO(chan)
| DWC_CTLL_DST_WIDTH(dst_width)
@@ -823,7 +823,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
switch (direction) {
case DMA_MEM_TO_DEV:
- reg_width = __fls(sconfig->dst_addr_width);
+ reg_width = __ffs(sconfig->dst_addr_width);
reg = sconfig->dst_addr;
ctllo = (DWC_DEFAULT_CTLLO(chan)
| DWC_CTLL_DST_WIDTH(reg_width)
@@ -843,7 +843,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
len = sg_dma_len(sg);
mem_width = min_t(unsigned int,
- data_width, dwc_fast_fls(mem | len));
+ data_width, dwc_fast_ffs(mem | len));
slave_sg_todev_fill_desc:
desc = dwc_desc_get(dwc);
@@ -883,7 +883,7 @@ slave_sg_todev_fill_desc:
}
break;
case DMA_DEV_TO_MEM:
- reg_width = __fls(sconfig->src_addr_width);
+ reg_width = __ffs(sconfig->src_addr_width);
reg = sconfig->src_addr;
ctllo = (DWC_DEFAULT_CTLLO(chan)
| DWC_CTLL_SRC_WIDTH(reg_width)
@@ -903,7 +903,7 @@ slave_sg_todev_fill_desc:
len = sg_dma_len(sg);
mem_width = min_t(unsigned int,
- data_width, dwc_fast_fls(mem | len));
+ data_width, dwc_fast_ffs(mem | len));
slave_sg_fromdev_fill_desc:
desc = dwc_desc_get(dwc);
--
2.7.2
--
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