[PATCH v2] ARM: pxa: ssp: remove unnessary free for devm_xxx

Firo Yang
2015-06-08T08:06:43Z

A Coccinelle warning.
It's not necessary to free memory allocated with devm_xxx
and using these free functions maybe lead to a double free that
will corrupt the resource subsys. So, I just remove them.

By the way, I replace devm_request_mem_region and devm_ioremap with
devm_ioremap_resource as Julia's suggestion.

Signed-off-by: Firo Yang <firogm@gmail.com>
---
arch/arm/plat-pxa/ssp.c | 24 +++---------------------
1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c
index ad9529c..a278ea0 100644
--- a/arch/arm/plat-pxa/ssp.c
+++ b/arch/arm/plat-pxa/ssp.c
@@ -182,21 +182,12 @@ static int pxa_ssp_probe(struct platform_device *pdev)
return -ENODEV;
}

- res = devm_request_mem_region(dev, res->start, resource_size(res),
- pdev->name);
- if (res == NULL) {
- dev_err(dev, "failed to request memory resource\n");
- return -EBUSY;
- }
+ ssp->mmio_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ssp->mmio_base))
+ return PTR_ERR(ssp->mmio_base);

ssp->phys_base = res->start;

- ssp->mmio_base = devm_ioremap(dev, res->start, resource_size(res));
- if (ssp->mmio_base == NULL) {
- dev_err(dev, "failed to ioremap() registers\n");
- return -ENODEV;
- }
-
ssp->irq = platform_get_irq(pdev, 0);
if (ssp->irq < 0) {
dev_err(dev, "no IRQ resource defined\n");
@@ -232,25 +223,16 @@ static int pxa_ssp_probe(struct platform_device *pdev)

static int pxa_ssp_remove(struct platform_device *pdev)
{
- struct resource *res;
struct ssp_device *ssp;

ssp = platform_get_drvdata(pdev);
if (ssp == NULL)
return -ENODEV;

- iounmap(ssp->mmio_base);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- clk_put(ssp->clk);
-
mutex_lock(&ssp_lock);
list_del(&ssp->node);
mutex_unlock(&ssp_lock);

- kfree(ssp);
return 0;
}

--
2.4.2