[PATCH 1/6] ASoC: omap: simplify platform_get_resource_byname/devm_ioremap_resource

Julia Lawall
2013-08-19T08:51:51Z

From: Julia Lawall <Julia.Lawall@lip6.fr>

Remove unneeded error handling on the result of a call to
platform_get_resource_byname when the value is passed to devm_ioremap_resource.

In the case of omap-dmic.c, the error-handling code of
devm_ioremap_resource is also corrected to include releasing the clock.

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

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

res = platform_get_resource_byname(...);
- if (res = NULL) { ... \(goto l;\|return ret;\) }
e = devm_ioremap_resource(e1, res);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
sound/soc/omap/omap-dmic.c | 9 +++------
sound/soc/omap/omap-mcpdm.c | 3 ---
2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/sound/soc/omap/omap-dmic.c b/sound/soc/omap/omap-dmic.c
index 4db1f8e..12e566b 100644
--- a/sound/soc/omap/omap-dmic.c
+++ b/sound/soc/omap/omap-dmic.c
@@ -480,15 +480,12 @@ static int asoc_dmic_probe(struct platform_device *pdev)
dmic->dma_data.filter_data = "up_link";

res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
- if (!res) {
- dev_err(dmic->dev, "invalid memory resource\n");
- ret = -ENODEV;
+ dmic->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(dmic->io_base)) {
+ ret = PTR_ERR(dmic->io_base);
goto err_put_clk;
}

- dmic->io_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dmic->io_base))
- return PTR_ERR(dmic->io_base);

ret = snd_soc_register_component(&pdev->dev, &omap_dmic_component,
&omap_dmic_dai, 1);
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index a49dc52..90d2a7c 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -480,9 +480,6 @@ static int asoc_mcpdm_probe(struct platform_device *pdev)
mcpdm->dma_data[1].filter_data = "up_link";

res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
- if (res = NULL)
- return -ENOMEM;
-
mcpdm->io_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mcpdm->io_base))
return PTR_ERR(mcpdm->io_base);