usb: gadget: s3c-hsudc: Use devm_* functions

devm_* functions are used to replace kzalloc, request_mem_region, ioremap
clk_get 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@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 9 insertions, 32 deletions

diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index e26a4e7ed2bf..fe4a46197181 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -135,7 +135,6 @@ struct s3c_hsudc_req {
  * @dev: The device reference used by probe function.
  * @lock: Lock to synchronize the usage of Endpoints (EP's are indexed).
  * @regs: Remapped base address of controller's register space.
- * @mem_rsrc: Device memory resource used for remapping device register space.
  * irq: IRQ number used by the controller.
  * uclk: Reference to the controller clock.
  * ep0state: Current state of EP0.
@@ -150,7 +149,6 @@ struct s3c_hsudc {
         struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsudc_supply_names)];
         spinlock_t lock;
         void __iomem *regs;
-        struct resource *mem_rsrc;
         int irq;
         struct clk *uclk;
         int ep0state;
@@ -1271,7 +1269,7 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev)
         struct s3c24xx_hsudc_platdata *pd = pdev->dev.platform_data;
         int ret, i;
 
-        hsudc = kzalloc(sizeof(struct s3c_hsudc) +
+        hsudc = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsudc) +
                         sizeof(struct s3c_hsudc_ep) * pd->epnum,
                         GFP_KERNEL);
         if (!hsudc) {
@@ -1296,25 +1294,12 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev)
         }
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(dev, "unable to obtain driver resource data\n");
-                ret = -ENODEV;
-                goto err_res;
-        }
-
-        hsudc->mem_rsrc = request_mem_region(res->start, resource_size(res),
-                                dev_name(&pdev->dev));
-        if (!hsudc->mem_rsrc) {
-                dev_err(dev, "failed to reserve register area\n");
-                ret = -ENODEV;
-                goto err_res;
-        }
 
-        hsudc->regs = ioremap(res->start, resource_size(res));
+        hsudc->regs = devm_request_and_ioremap(&pdev->dev, res);
         if (!hsudc->regs) {
                 dev_err(dev, "error mapping device register area\n");
                 ret = -EBUSY;
-                goto err_remap;
+                goto err_res;
         }
 
         spin_lock_init(&hsudc->lock);
@@ -1337,21 +1322,22 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev)
         ret = platform_get_irq(pdev, 0);
         if (ret < 0) {
                 dev_err(dev, "unable to obtain IRQ number\n");
-                goto err_irq;
+                goto err_res;
         }
         hsudc->irq = ret;
 
-        ret = request_irq(hsudc->irq, s3c_hsudc_irq, 0, driver_name, hsudc);
+        ret = devm_request_irq(&pdev->dev, hsudc->irq, s3c_hsudc_irq, 0,
+                                driver_name, hsudc);
         if (ret < 0) {
                 dev_err(dev, "irq request failed\n");
-                goto err_irq;
+                goto err_res;
         }
 
-        hsudc->uclk = clk_get(&pdev->dev, "usb-device");
+        hsudc->uclk = devm_clk_get(&pdev->dev, "usb-device");
         if (IS_ERR(hsudc->uclk)) {
                 dev_err(dev, "failed to find usb-device clock source\n");
                 ret = PTR_ERR(hsudc->uclk);
-                goto err_clk;
+                goto err_res;
         }
         clk_enable(hsudc->uclk);
 
@@ -1377,21 +1363,12 @@ err_add_udc:
         device_unregister(&hsudc->gadget.dev);
 err_add_device:
         clk_disable(hsudc->uclk);
-        clk_put(hsudc->uclk);
-err_clk:
-        free_irq(hsudc->irq, hsudc);
-err_irq:
-        iounmap(hsudc->regs);
-
-err_remap:
-        release_mem_region(res->start, resource_size(res));
 err_res:
         if (!IS_ERR_OR_NULL(hsudc->transceiver))
                 usb_put_phy(hsudc->transceiver);
 
         regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
 err_supplies:
-        kfree(hsudc);
         return ret;
 }