devm_* functions are used to replace kzalloc, request_mem_region, ioremap
and request_irq functions in probe call. With the usage of devm_* functions
explicit freeing and unmapping is not required.
Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
---
drivers/usb/gadget/s3c-hsotg.c | 51 ++++++++-------------------------------
1 files changed, 11 insertions(+), 40 deletions(-)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index f4abb0e..d375851 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -136,7 +136,6 @@ struct s3c_hsotg_ep {
* @driver: USB gadget driver
* @plat: The platform specific configuration data.
* @regs: The memory area mapped for accessing registers.
- * @regs_res: The resource that was allocated when claiming register space.
* @irq: The IRQ number we are using
* @supplies: Definition of USB power supplies
* @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
@@ -158,7 +157,6 @@ struct s3c_hsotg {
struct s3c_hsotg_plat *plat;
void __iomem *regs;
- struct resource *regs_res;
int irq;
struct clk *clk;
@@ -3477,7 +3475,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
return -EINVAL;
}
- hsotg = kzalloc(sizeof(struct s3c_hsotg), GFP_KERNEL);
+ hsotg = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsotg), GFP_KERNEL);
if (!hsotg) {
dev_err(dev, "cannot get memory\n");
return -ENOMEM;
@@ -3489,46 +3487,33 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
hsotg->clk = clk_get(&pdev->dev, "otg");
if (IS_ERR(hsotg->clk)) {
dev_err(dev, "cannot get otg clock\n");
- ret = PTR_ERR(hsotg->clk);
- goto err_mem;
+ return PTR_ERR(hsotg->clk);
}
platform_set_drvdata(pdev, hsotg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "cannot find register resource 0\n");
- ret = -EINVAL;
- goto err_clk;
- }
-
- hsotg->regs_res = request_mem_region(res->start, resource_size(res),
- dev_name(dev));
- if (!hsotg->regs_res) {
- dev_err(dev, "cannot reserve registers\n");
- ret = -ENOENT;
- goto err_clk;
- }
- hsotg->regs = ioremap(res->start, resource_size(res));
+ hsotg->regs = devm_request_and_ioremap(&pdev->dev, res);
if (!hsotg->regs) {
dev_err(dev, "cannot map registers\n");
ret = -ENXIO;
- goto err_regs_res;
+ goto err_clk;
}
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err(dev, "cannot find IRQ\n");
- goto err_regs;
+ goto err_clk;
}
hsotg->irq = ret;
- ret = request_irq(ret, s3c_hsotg_irq, 0, dev_name(dev), hsotg);
+ ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0,
+ dev_name(dev), hsotg);
if (ret < 0) {
dev_err(dev, "cannot claim IRQ\n");
- goto err_regs;
+ goto err_clk;
}
dev_info(dev, "regs %p, irq %d\n", hsotg->regs, hsotg->irq);
@@ -3558,7 +3543,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
hsotg->supplies);
if (ret) {
dev_err(dev, "failed to request supplies: %d\n", ret);
- goto err_irq;
+ goto err_clk;
}
ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
@@ -3642,19 +3627,11 @@ err_ep_mem:
err_supplies:
s3c_hsotg_phy_disable(hsotg);
regulator_bulk_free(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
-err_irq:
- free_irq(hsotg->irq, hsotg);
-err_regs:
- iounmap(hsotg->regs);
-
-err_regs_res:
- release_resource(hsotg->regs_res);
- kfree(hsotg->regs_res);
+
err_clk:
clk_disable_unprepare(hsotg->clk);
clk_put(hsotg->clk);
-err_mem:
- kfree(hsotg);
+
return ret;
}
@@ -3675,12 +3652,6 @@ static int __devexit s3c_hsotg_remove(struct platform_device *pdev)
usb_gadget_unregister_driver(hsotg->driver);
}
- free_irq(hsotg->irq, hsotg);
- iounmap(hsotg->regs);
-
- release_resource(hsotg->regs_res);
- kfree(hsotg->regs_res);
-
s3c_hsotg_phy_disable(hsotg);
regulator_bulk_free(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
--
1.7.4.1
--
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