pwm: simplify use of devm_ioremap_resource
authorJulia Lawall <Julia.Lawall@lip6.fr>
Wed, 14 Aug 2013 09:11:25 +0000 (11:11 +0200)
committerThierry Reding <thierry.reding@gmail.com>
Tue, 3 Sep 2013 11:09:16 +0000 (13:09 +0200)
Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
drivers/pwm/pwm-lpc32xx.c
drivers/pwm/pwm-renesas-tpu.c
drivers/pwm/pwm-spear.c

index efb6c7bf8750f0ffc8f31e956e1fbdaff8358e6b..efac99e03d57191c2d8667264cff0a5e8a603dbe 100644 (file)
@@ -124,9 +124,6 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res)
-               return -EINVAL;
-
        lpc32xx->base = devm_ioremap_resource(&pdev->dev, res);
        if (IS_ERR(lpc32xx->base))
                return PTR_ERR(lpc32xx->base);
index 3eeffff6928025a92a77267dcc94221ded51193b..aff6ba9b49e7b4b3bac9d566af39f01c6136b6bb 100644 (file)
@@ -418,11 +418,6 @@ static int tpu_probe(struct platform_device *pdev)
 
        /* Map memory, get clock and pin control. */
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "failed to get I/O memory\n");
-               return -ENXIO;
-       }
-
        tpu->base = devm_ioremap_resource(&pdev->dev, res);
        if (IS_ERR(tpu->base))
                return PTR_ERR(tpu->base);
index a54d21401431d6caeb06b7ecd75da5b15c02fbfe..8ad26b8bf4189deff46af5844b1f5c65ad21d0ff 100644 (file)
@@ -178,18 +178,13 @@ static int spear_pwm_probe(struct platform_device *pdev)
        int ret;
        u32 val;
 
-       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!r) {
-               dev_err(&pdev->dev, "no memory resources defined\n");
-               return -ENODEV;
-       }
-
        pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
        if (!pc) {
                dev_err(&pdev->dev, "failed to allocate memory\n");
                return -ENOMEM;
        }
 
+       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
        if (IS_ERR(pc->mmio_base))
                return PTR_ERR(pc->mmio_base);