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Message-ID: <Pine.LNX.4.64.0912101832270.4487@axis700.grange>
Date: Thu, 10 Dec 2009 18:35:07 +0100 (CET)
From: Guennadi Liakhovetski <g.liakhovetski@....de>
To: linux-kernel@...r.kernel.org
cc: Dan Williams <dan.j.williams@...el.com>, linux-sh@...r.kernel.org
Subject: [PATCH 1/3 v2] sh: stylistic improvements for the DMA driver
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@....de>
---
drivers/dma/shdma.c | 34 +++++++++++++++++-----------------
drivers/dma/shdma.h | 14 +++++++-------
2 files changed, 24 insertions(+), 24 deletions(-)
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index f5fae12..8d9acd7 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -80,17 +80,17 @@ static int sh_dmae_rst(int id)
unsigned short dmaor;
sh_dmae_ctl_stop(id);
- dmaor = (dmaor_read_reg(id)|DMAOR_INIT);
+ dmaor = dmaor_read_reg(id) | DMAOR_INIT;
dmaor_write_reg(id, dmaor);
- if ((dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF))) {
+ if (dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF)) {
pr_warning(KERN_ERR "dma-sh: Can't initialize DMAOR.\n");
return -EINVAL;
}
return 0;
}
-static int dmae_is_idle(struct sh_dmae_chan *sh_chan)
+static int dmae_is_busy(struct sh_dmae_chan *sh_chan)
{
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
if (chcr & CHCR_DE) {
@@ -110,15 +110,14 @@ static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs hw)
{
sh_dmae_writel(sh_chan, hw.sar, SAR);
sh_dmae_writel(sh_chan, hw.dar, DAR);
- sh_dmae_writel(sh_chan,
- (hw.tcr >> calc_xmit_shift(sh_chan)), TCR);
+ sh_dmae_writel(sh_chan, hw.tcr >> calc_xmit_shift(sh_chan), TCR);
}
static void dmae_start(struct sh_dmae_chan *sh_chan)
{
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
- chcr |= (CHCR_DE|CHCR_IE);
+ chcr |= CHCR_DE | CHCR_IE;
sh_dmae_writel(sh_chan, chcr, CHCR);
}
@@ -132,7 +131,7 @@ static void dmae_halt(struct sh_dmae_chan *sh_chan)
static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
{
- int ret = dmae_is_idle(sh_chan);
+ int ret = dmae_is_busy(sh_chan);
/* When DMA was working, can not set data to CHCR */
if (ret)
return ret;
@@ -149,7 +148,7 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
u32 addr;
int shift = 0;
- int ret = dmae_is_idle(sh_chan);
+ int ret = dmae_is_busy(sh_chan);
if (ret)
return ret;
@@ -307,7 +306,7 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
new = sh_dmae_get_desc(sh_chan);
if (!new) {
dev_err(sh_chan->dev,
- "No free memory for link descriptor\n");
+ "No free memory for link descriptor\n");
goto err_get_desc;
}
@@ -388,7 +387,7 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
struct sh_dmae_regs hw;
/* DMA work check */
- if (dmae_is_idle(sh_chan))
+ if (dmae_is_busy(sh_chan))
return;
/* Find the first un-transfer desciptor */
@@ -497,8 +496,9 @@ static void dmae_do_tasklet(unsigned long data)
struct sh_dmae_chan *sh_chan = (struct sh_dmae_chan *)data;
struct sh_desc *desc, *_desc, *cur_desc = NULL;
u32 sar_buf = sh_dmae_readl(sh_chan, SAR);
+
list_for_each_entry_safe(desc, _desc,
- &sh_chan->ld_queue, node) {
+ &sh_chan->ld_queue, node) {
if ((desc->hw.sar + desc->hw.tcr) == sar_buf) {
cur_desc = desc;
break;
@@ -543,8 +543,8 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
/* alloc channel */
new_sh_chan = kzalloc(sizeof(struct sh_dmae_chan), GFP_KERNEL);
if (!new_sh_chan) {
- dev_err(shdev->common.dev, "No free memory for allocating "
- "dma channels!\n");
+ dev_err(shdev->common.dev,
+ "No free memory for allocating dma channels!\n");
return -ENOMEM;
}
@@ -586,8 +586,8 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
"sh-dmae%d", new_sh_chan->id);
/* set up channel irq */
- err = request_irq(irq, &sh_dmae_interrupt,
- irqflags, new_sh_chan->dev_id, new_sh_chan);
+ err = request_irq(irq, &sh_dmae_interrupt, irqflags,
+ new_sh_chan->dev_id, new_sh_chan);
if (err) {
dev_err(shdev->common.dev, "DMA channel %d request_irq error "
"with return %d\n", id, err);
@@ -691,8 +691,8 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
}
for (ecnt = 0 ; ecnt < ARRAY_SIZE(eirq); ecnt++) {
- err = request_irq(eirq[ecnt], sh_dmae_err,
- irqflags, "DMAC Address Error", shdev);
+ err = request_irq(eirq[ecnt], sh_dmae_err, irqflags,
+ "DMAC Address Error", shdev);
if (err) {
dev_err(&pdev->dev, "DMA device request_irq"
"error (irq %d) with return %d\n",
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 2b4bc15..60b81e5 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -35,15 +35,15 @@ struct sh_desc {
struct sh_dmae_chan {
dma_cookie_t completed_cookie; /* The maximum cookie completed */
- spinlock_t desc_lock; /* Descriptor operation lock */
- struct list_head ld_queue; /* Link descriptors queue */
- struct list_head ld_free; /* Link descriptors free */
- struct dma_chan common; /* DMA common channel */
- struct device *dev; /* Channel device */
+ spinlock_t desc_lock; /* Descriptor operation lock */
+ struct list_head ld_queue; /* Link descriptors queue */
+ struct list_head ld_free; /* Link descriptors free */
+ struct dma_chan common; /* DMA common channel */
+ struct device *dev; /* Channel device */
struct tasklet_struct tasklet; /* Tasklet */
- int descs_allocated; /* desc count */
+ int descs_allocated; /* desc count */
int id; /* Raw id of this channel */
- char dev_id[16]; /* unique name per DMAC of channel */
+ char dev_id[16]; /* unique name per DMAC of channel */
/* Set chcr */
int (*set_chcr)(struct sh_dmae_chan *sh_chan, u32 regs);
--
1.6.2.4
--
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