video: exynos_dp: use devm_ functions

The devm_ functions allocate memory that is released when a driver
detaches. This makes the code smaller and a bit simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

2 files changed, 12 insertions, 38 deletions

diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index ef4d1ab4cf4d..aabd214990d3 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -858,7 +858,8 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
                 return -EINVAL;
         }
 
-        dp = kzalloc(sizeof(struct exynos_dp_device), GFP_KERNEL);
+        dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
+                                GFP_KERNEL);
         if (!dp) {
                 dev_err(&pdev->dev, "no memory for device data\n");
                 return -ENOMEM;
@@ -869,8 +870,7 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
         dp->clock = clk_get(&pdev->dev, "dp");
         if (IS_ERR(dp->clock)) {
                 dev_err(&pdev->dev, "failed to get clock\n");
-                ret = PTR_ERR(dp->clock);
-                goto err_dp;
+                return PTR_ERR(dp->clock);
         }
 
         clk_enable(dp->clock);
@@ -882,35 +882,25 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
                 goto err_clock;
         }
 
-        res = request_mem_region(res->start, resource_size(res),
-                                dev_name(&pdev->dev));
-        if (!res) {
-                dev_err(&pdev->dev, "failed to request registers region\n");
-                ret = -EINVAL;
-                goto err_clock;
-        }
-
-        dp->res = res;
-
-        dp->reg_base = ioremap(res->start, resource_size(res));
+        dp->reg_base = devm_request_and_ioremap(&pdev->dev, res);
         if (!dp->reg_base) {
                 dev_err(&pdev->dev, "failed to ioremap\n");
                 ret = -ENOMEM;
-                goto err_req_region;
+                goto err_clock;
         }
 
         dp->irq = platform_get_irq(pdev, 0);
         if (!dp->irq) {
                 dev_err(&pdev->dev, "failed to get irq\n");
                 ret = -ENODEV;
-                goto err_ioremap;
+                goto err_clock;
         }
 
-        ret = request_irq(dp->irq, exynos_dp_irq_handler, 0,
-                        "exynos-dp", dp);
+        ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, 0,
+                                "exynos-dp", dp);
         if (ret) {
                 dev_err(&pdev->dev, "failed to request irq\n");
-                goto err_ioremap;
+                goto err_clock;
         }
 
         dp->video_info = pdata->video_info;
@@ -922,7 +912,7 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
         ret = exynos_dp_detect_hpd(dp);
         if (ret) {
                 dev_err(&pdev->dev, "unable to detect hpd\n");
-                goto err_irq;
+                goto err_clock;
         }
 
         exynos_dp_handle_edid(dp);
@@ -931,7 +921,7 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
                                 dp->video_info->link_rate);
         if (ret) {
                 dev_err(&pdev->dev, "unable to do link train\n");
-                goto err_irq;
+                goto err_clock;
         }
 
         exynos_dp_enable_scramble(dp, 1);
@@ -945,23 +935,15 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
         ret = exynos_dp_config_video(dp, dp->video_info);
         if (ret) {
                 dev_err(&pdev->dev, "unable to config video\n");
-                goto err_irq;
+                goto err_clock;
         }
 
         platform_set_drvdata(pdev, dp);
 
         return 0;
 
-err_irq:
-        free_irq(dp->irq, dp);
-err_ioremap:
-        iounmap(dp->reg_base);
-err_req_region:
-        release_mem_region(res->start, resource_size(res));
 err_clock:
         clk_put(dp->clock);
-err_dp:
-        kfree(dp);
 
         return ret;
 }
@@ -974,16 +956,9 @@ static int __devexit exynos_dp_remove(struct platform_device *pdev)
         if (pdata && pdata->phy_exit)
                 pdata->phy_exit();
 
-        free_irq(dp->irq, dp);
-        iounmap(dp->reg_base);
-
         clk_disable(dp->clock);
         clk_put(dp->clock);
 
-        release_mem_region(dp->res->start, resource_size(dp->res));
-
-        kfree(dp);
-
         return 0;
 }
 
diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 519c3a6a5c58..8f596b9e7b2b 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -26,7 +26,6 @@ struct link_train {
 
 struct exynos_dp_device {
         struct device           *dev;
-        struct resource         *res;
         struct clk              *clock;
         unsigned int            irq;
         void __iomem            *reg_base;