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authorShawn Guo <shawn.guo@linaro.org>2012-09-15 15:16:47 +0800
committerShawn Guo <shawn.guo@linaro.org>2012-10-15 10:03:16 +0800
commit04bbd8ef533fed260ea8cc249b534c1cbbc7f9d0 (patch)
tree8c013af0b2e550bf31651b9bdd0ca4b0039479ce /drivers/dma/imx-dma.c
parentbb1d34a20d537e2f2342db8b5918512f05b0f852 (diff)
dma: imx-dma: use devm_kzalloc and devm_request_irq
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>
Diffstat (limited to 'drivers/dma/imx-dma.c')
-rw-r--r--drivers/dma/imx-dma.c54
1 files changed, 15 insertions, 39 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index f11b5b2b1a1c..1f2b79009d69 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -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;
}