From 04bbd8ef533fed260ea8cc249b534c1cbbc7f9d0 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sat, 15 Sep 2012 15:16:47 +0800 Subject: [PATCH] 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 Acked-by: Sascha Hauer Acked-by: Arnd Bergmann Cc: Vinod Koul --- drivers/dma/imx-dma.c | 54 ++++++++++++------------------------------- 1 file 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; } -- 2.30.2