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dma: imx-dma: use devm_kzalloc and devm_request_irq

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Use managed functions devm_kzalloc and devm_request_irq instead to
make the error patch simpler.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Shawn Guo 2012-09-15 15:16:47 +08:00
parent bb1d34a20d
commit 04bbd8ef53
1 changed files with 15 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/dma/imx-dma.c
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@ -962,7 +962,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
int ret, i;
imxdma = kzalloc(sizeof(*imxdma), GFP_KERNEL);
imxdma = devm_kzalloc(&pdev->dev, sizeof(*imxdma), GFP_KERNEL);
if (!imxdma)
return -ENOMEM;
@ -978,16 +978,12 @@ static int __init imxdma_probe(struct platform_device *pdev)
}
imxdma->dma_ipg = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(imxdma->dma_ipg)) {
ret = PTR_ERR(imxdma->dma_ipg);
goto err_clk;
}
if (IS_ERR(imxdma->dma_ipg))
return PTR_ERR(imxdma->dma_ipg);
imxdma->dma_ahb = devm_clk_get(&pdev->dev, "ahb");
if (IS_ERR(imxdma->dma_ahb)) {
ret = PTR_ERR(imxdma->dma_ahb);
goto err_clk;
}
if (IS_ERR(imxdma->dma_ahb))
return PTR_ERR(imxdma->dma_ahb);
clk_prepare_enable(imxdma->dma_ipg);
clk_prepare_enable(imxdma->dma_ahb);
@ -996,17 +992,18 @@ static int __init imxdma_probe(struct platform_device *pdev)
imx_dmav1_writel(imxdma, DCR_DRST, DMA_DCR);
if (cpu_is_mx1()) {
ret = request_irq(MX1_DMA_INT, dma_irq_handler, 0, "DMA", imxdma);
ret = devm_request_irq(&pdev->dev, MX1_DMA_INT,
dma_irq_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register IRQ for DMA\n");
goto err_enable;
goto err;
}
ret = request_irq(MX1_DMA_ERR, imxdma_err_handler, 0, "DMA", imxdma);
ret = devm_request_irq(&pdev->dev, MX1_DMA_ERR,
imxdma_err_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register ERRIRQ for DMA\n");
free_irq(MX1_DMA_INT, NULL);
goto err_enable;
goto err;
}
}
@ -1037,13 +1034,13 @@ static int __init imxdma_probe(struct platform_device *pdev)
struct imxdma_channel *imxdmac = &imxdma->channel[i];
if (cpu_is_mx21() || cpu_is_mx27()) {
ret = request_irq(MX2x_INT_DMACH0 + i,
ret = devm_request_irq(&pdev->dev, MX2x_INT_DMACH0 + i,
dma_irq_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register IRQ %d "
"for DMA channel %d\n",
MX2x_INT_DMACH0 + i, i);
goto err_init;
goto err;
}
init_timer(&imxdmac->watchdog);
imxdmac->watchdog.function = &imxdma_watchdog;
@ -1089,46 +1086,25 @@ static int __init imxdma_probe(struct platform_device *pdev)
ret = dma_async_device_register(&imxdma->dma_device);
if (ret) {
dev_err(&pdev->dev, "unable to register\n");
goto err_init;
goto err;
}
return 0;
err_init:
if (cpu_is_mx21() || cpu_is_mx27()) {
while (--i >= 0)
free_irq(MX2x_INT_DMACH0 + i, NULL);
} else if cpu_is_mx1() {
free_irq(MX1_DMA_INT, NULL);
free_irq(MX1_DMA_ERR, NULL);
}
err_enable:
err:
clk_disable_unprepare(imxdma->dma_ipg);
clk_disable_unprepare(imxdma->dma_ahb);
err_clk:
kfree(imxdma);
return ret;
}
static int __exit imxdma_remove(struct platform_device *pdev)
{
struct imxdma_engine *imxdma = platform_get_drvdata(pdev);
int i;
dma_async_device_unregister(&imxdma->dma_device);
if (cpu_is_mx21() || cpu_is_mx27()) {
for (i = 0; i < IMX_DMA_CHANNELS; i++)
free_irq(MX2x_INT_DMACH0 + i, NULL);
} else if cpu_is_mx1() {
free_irq(MX1_DMA_INT, NULL);
free_irq(MX1_DMA_ERR, NULL);
}
clk_disable_unprepare(imxdma->dma_ipg);
clk_disable_unprepare(imxdma->dma_ahb);
kfree(imxdma);
return 0;
}