pwm: simplify use of devm_ioremap_resource

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>

3 files changed, 1 insertions, 14 deletions

diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index efb6c7bf8750..efac99e03d57 100644
--- a/drivers/pwm/pwm-lpc32xx.c
+++ b/drivers/pwm/pwm-lpc32xx.c
@@ -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);
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index 3eeffff69280..aff6ba9b49e7 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -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);
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index a54d21401431..8ad26b8bf418 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -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);