[PATCH 21/29] pwm: simplify use of devm_ioremap_resource

Julia Lawall
2013-08-14T09:11:25Z

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>

---
drivers/pwm/pwm-lpc32xx.c | 3 ---
drivers/pwm/pwm-renesas-tpu.c | 5 -----
drivers/pwm/pwm-spear.c | 7 +------
3 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index efb6c7b..efac99e 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 2600892..444d589 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -404,11 +404,6 @@ 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 a54d214..8ad26b8 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);