From dbde5c2934d10f87cc45ed9a9b95cac6f0c0fdd2 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 24 Jul 2012 11:00:55 +0300 Subject: [PATCH] dw_dmac: use devm_* functions to simplify code Use devm_kzalloc, devm_clk_get, devm_request_irq, and devm_request_and_ioremap to reduce the code and to simplify the error path. Signed-off-by: Andy Shevchenko Cc: Viresh Kumar Acked-by: Viresh Kumar Signed-off-by: Vinod Koul --- drivers/dma/dw_dmac.c | 53 +++++++------------------------------- drivers/dma/dw_dmac_regs.h | 2 -- 2 files changed, 10 insertions(+), 45 deletions(-) diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 57beb5c8e3fd..ed2c9499d3ea 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -1392,26 +1392,17 @@ static int __devinit dw_probe(struct platform_device *pdev) size = sizeof(struct dw_dma); size += pdata->nr_channels * sizeof(struct dw_dma_chan); - dw = kzalloc(size, GFP_KERNEL); + dw = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); if (!dw) return -ENOMEM; - if (!request_mem_region(io->start, DW_REGLEN, pdev->dev.driver->name)) { - err = -EBUSY; - goto err_kfree; - } - - dw->regs = ioremap(io->start, DW_REGLEN); - if (!dw->regs) { - err = -ENOMEM; - goto err_release_r; - } + dw->regs = devm_request_and_ioremap(&pdev->dev, io); + if (!dw->regs) + return -EBUSY; - dw->clk = clk_get(&pdev->dev, "hclk"); - if (IS_ERR(dw->clk)) { - err = PTR_ERR(dw->clk); - goto err_clk; - } + dw->clk = devm_clk_get(&pdev->dev, "hclk"); + if (IS_ERR(dw->clk)) + return PTR_ERR(dw->clk); clk_prepare_enable(dw->clk); /* Calculate all channel mask before DMA setup */ @@ -1423,9 +1414,10 @@ static int __devinit dw_probe(struct platform_device *pdev) /* disable BLOCK interrupts as well */ channel_clear_bit(dw, MASK.BLOCK, dw->all_chan_mask); - err = request_irq(irq, dw_dma_interrupt, 0, "dw_dmac", dw); + err = devm_request_irq(&pdev->dev, irq, dw_dma_interrupt, 0, + "dw_dmac", dw); if (err) - goto err_irq; + return err; platform_set_drvdata(pdev, dw); @@ -1491,30 +1483,16 @@ static int __devinit dw_probe(struct platform_device *pdev) dma_async_device_register(&dw->dma); return 0; - -err_irq: - clk_disable_unprepare(dw->clk); - clk_put(dw->clk); -err_clk: - iounmap(dw->regs); - dw->regs = NULL; -err_release_r: - release_resource(io); -err_kfree: - kfree(dw); - return err; } static int __devexit dw_remove(struct platform_device *pdev) { struct dw_dma *dw = platform_get_drvdata(pdev); struct dw_dma_chan *dwc, *_dwc; - struct resource *io; dw_dma_off(dw); dma_async_device_unregister(&dw->dma); - free_irq(platform_get_irq(pdev, 0), dw); tasklet_kill(&dw->tasklet); list_for_each_entry_safe(dwc, _dwc, &dw->dma.channels, @@ -1523,17 +1501,6 @@ static int __devexit dw_remove(struct platform_device *pdev) channel_clear_bit(dw, CH_EN, dwc->mask); } - clk_disable_unprepare(dw->clk); - clk_put(dw->clk); - - iounmap(dw->regs); - dw->regs = NULL; - - io = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(io->start, DW_REGLEN); - - kfree(dw); - return 0; } diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h index 50830bee087a..f6d92d72ae40 100644 --- a/drivers/dma/dw_dmac_regs.h +++ b/drivers/dma/dw_dmac_regs.h @@ -140,8 +140,6 @@ struct dw_dma_regs { /* Bitfields in CFG */ #define DW_CFG_DMA_EN (1 << 0) -#define DW_REGLEN 0x400 - enum dw_dmac_flags { DW_DMA_IS_CYCLIC = 0, }; -- 2.20.1