[PATCH 04/11] spi: designware: Use devm_*() functions

[Jingoo Han]

Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: Jingoo Han <jg1....@samsung.com>
---
 drivers/spi/spi-dw-mmio.c |   57 +++++++++++----------------------------------
 1 file changed, 14 insertions(+), 43 deletions(-)

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 168c620..1107ca9 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -30,14 +30,13 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
 {
        struct dw_spi_mmio *dwsmmio;
        struct dw_spi *dws;
-       struct resource *mem, *ioarea;
+       struct resource *mem;
        int ret;
 
-       dwsmmio = kzalloc(sizeof(struct dw_spi_mmio), GFP_KERNEL);
-       if (!dwsmmio) {
-               ret = -ENOMEM;
-               goto err_end;
-       }
+       dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),
+                               GFP_KERNEL);
+       if (!dwsmmio)
+               return -ENOMEM;
 
        dws = &dwsmmio->dws;
 
@@ -45,37 +44,23 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
        mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!mem) {
                dev_err(&pdev->dev, "no mem resource?\n");
-               ret = -EINVAL;
-               goto err_kfree;
-       }
-
-       ioarea = request_mem_region(mem->start, resource_size(mem),
-                       pdev->name);
-       if (!ioarea) {
-               dev_err(&pdev->dev, "SPI region already claimed\n");
-               ret = -EBUSY;
-               goto err_kfree;
+               return -EINVAL;
        }
 
-       dws->regs = ioremap_nocache(mem->start, resource_size(mem));
-       if (!dws->regs) {
-               dev_err(&pdev->dev, "SPI region already mapped\n");
-               ret = -ENOMEM;
-               goto err_release_reg;
-       }
+       mem->flags &= ~IORESOURCE_CACHEABLE;
+       dws->regs = devm_ioremap_resource(&pdev->dev, mem);
+       if (IS_ERR(dws->regs))
+               return PTR_ERR(dws->regs);
 
        dws->irq = platform_get_irq(pdev, 0);
        if (dws->irq < 0) {
                dev_err(&pdev->dev, "no irq resource?\n");
-               ret = dws->irq; /* -ENXIO */
-               goto err_unmap;
+               return dws->irq; /* -ENXIO */
        }
 
-       dwsmmio->clk = clk_get(&pdev->dev, NULL);
-       if (IS_ERR(dwsmmio->clk)) {
-               ret = PTR_ERR(dwsmmio->clk);
-               goto err_unmap;
-       }
+       dwsmmio->clk = devm_clk_get(&pdev->dev, NULL);
+       if (IS_ERR(dwsmmio->clk))
+               return PTR_ERR(dwsmmio->clk);
        clk_enable(dwsmmio->clk);
 
        dws->parent_dev = &pdev->dev;
@@ -92,33 +77,19 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
 
 err_clk:
        clk_disable(dwsmmio->clk);
-       clk_put(dwsmmio->clk);
        dwsmmio->clk = NULL;
-err_unmap:
-       iounmap(dws->regs);
-err_release_reg:
-       release_mem_region(mem->start, resource_size(mem));
-err_kfree:
-       kfree(dwsmmio);
-err_end:
        return ret;
 }
 
 static int dw_spi_mmio_remove(struct platform_device *pdev)
 {
        struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev);
-       struct resource *mem;
 
        clk_disable(dwsmmio->clk);
-       clk_put(dwsmmio->clk);
        dwsmmio->clk = NULL;
 
        dw_spi_remove_host(&dwsmmio->dws);
-       iounmap(dwsmmio->dws.regs);
-       kfree(dwsmmio);
 
-       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       release_mem_region(mem->start, resource_size(mem));
        return 0;
 }
 
-- 
1.7.10.4


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