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Date: Fri, 2 Aug 2013 16:18:09 +0200 (CEST)
From: Guennadi Liakhovetski <g.liakhovetski@....de>
To: linux-sh@...r.kernel.org
cc: Magnus Damm <magnus.damm@...il.com>, linux-kernel@...r.kernel.org,
"Koul, Vinod" <vinod.koul@...el.com>
Subject: [PATCH v2] DMA: shdma: make a pointer const
Platform data shouldn't be changed at run-time, so, pointers to it should
be const.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>
---
This is a re-send of a patch, previously submitted as a part of a
patch-series, although it isn't really related to its topic:
https://lkml.org/lkml/2013/7/19/605
Should go on top of my other patch series "DMA: shdma: several stylistic
improvements and support for new SoCs"
http://thread.gmane.org/gmane.linux.ports.sh.devel/24826
drivers/dma/sh/shdma.c | 10 +++++-----
drivers/dma/sh/shdma.h | 2 +-
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c
index b3f959c..7af64b9 100644
--- a/drivers/dma/sh/shdma.c
+++ b/drivers/dma/sh/shdma.c
@@ -177,7 +177,7 @@ static bool dmae_is_busy(struct sh_dmae_chan *sh_chan)
static unsigned int calc_xmit_shift(struct sh_dmae_chan *sh_chan, u32 chcr)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
- struct sh_dmae_pdata *pdata = shdev->pdata;
+ const struct sh_dmae_pdata *pdata = shdev->pdata;
int cnt = ((chcr & pdata->ts_low_mask) >> pdata->ts_low_shift) |
((chcr & pdata->ts_high_mask) >> pdata->ts_high_shift);
@@ -190,7 +190,7 @@ static unsigned int calc_xmit_shift(struct sh_dmae_chan *sh_chan, u32 chcr)
static u32 log2size_to_chcr(struct sh_dmae_chan *sh_chan, int l2size)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
- struct sh_dmae_pdata *pdata = shdev->pdata;
+ const struct sh_dmae_pdata *pdata = shdev->pdata;
int i;
for (i = 0; i < pdata->ts_shift_num; i++)
@@ -250,7 +250,7 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
- struct sh_dmae_pdata *pdata = shdev->pdata;
+ const struct sh_dmae_pdata *pdata = shdev->pdata;
const struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->shdma_chan.id];
void __iomem *addr = shdev->dmars;
unsigned int shift = chan_pdata->dmars_bit;
@@ -319,7 +319,7 @@ static const struct sh_dmae_slave_config *dmae_find_slave(
struct sh_dmae_chan *sh_chan, int match)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
- struct sh_dmae_pdata *pdata = shdev->pdata;
+ const struct sh_dmae_pdata *pdata = shdev->pdata;
const struct sh_dmae_slave_config *cfg;
int i;
@@ -665,7 +665,7 @@ static const struct shdma_ops sh_dmae_shdma_ops = {
static int sh_dmae_probe(struct platform_device *pdev)
{
- struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
+ const struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
unsigned long irqflags = IRQF_DISABLED,
chan_flag[SH_DMAE_MAX_CHANNELS] = {};
int errirq, chan_irq[SH_DMAE_MAX_CHANNELS];
diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h
index 06aae6e..3d9dca1 100644
--- a/drivers/dma/sh/shdma.h
+++ b/drivers/dma/sh/shdma.h
@@ -36,7 +36,7 @@ struct sh_dmae_chan {
struct sh_dmae_device {
struct shdma_dev shdma_dev;
struct sh_dmae_chan *chan[SH_DMAE_MAX_CHANNELS];
- struct sh_dmae_pdata *pdata;
+ const struct sh_dmae_pdata *pdata;
struct list_head node;
void __iomem *chan_reg;
void __iomem *dmars;
--
1.7.2.5
--
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