drm: arm: use devm_xxx functions

Signed-off-by: Chanho Park <chanho61.park@samsung.com>

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index 4c25ba1..42f990b 100644 (file)
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -43,11 +43,7 @@ static int hdlcd_unload(struct drm_device *dev)
 
        platform_set_drvdata(dev->platformdev, NULL);
 
-       if (hdlcd->mmio)
-               iounmap(hdlcd->mmio);
-
        dev->dev_private = NULL;
-       kfree(hdlcd);
 
        return 0;
 }
@@ -61,7 +57,7 @@ static int hdlcd_load(struct drm_device *dev, unsigned long flags)
        u32 version;
        int ret;
 
-       hdlcd = kzalloc(sizeof(*hdlcd), GFP_KERNEL);
+       hdlcd = devm_kzalloc(&pdev->dev, sizeof(*hdlcd), GFP_KERNEL);
        if (!hdlcd) {
                dev_err(dev->dev, "failed to allocate driver data\n");
                return -ENOMEM;
@@ -83,18 +79,19 @@ static int hdlcd_load(struct drm_device *dev, unsigned long flags)
                goto fail;
        }
 
-       hdlcd->mmio = ioremap_nocache(res->start, resource_size(res));
+       hdlcd->mmio = devm_ioremap_nocache(&pdev->dev, res->start,
+                       resource_size(res));
        if (!hdlcd->mmio) {
                dev_err(dev->dev, "failed to map control registers area\n");
                ret = -ENOMEM;
                goto fail;
        }
 
-       hdlcd->clk = clk_get(dev->dev, "pxlclk");
+       hdlcd->clk = devm_clk_get(dev->dev, "pxlclk");
        if (IS_ERR(hdlcd->clk)) {
                dev_err(dev->dev, "unable to get an usable clock\n");
                ret = PTR_ERR(hdlcd->clk);
-               goto fail;
+               return ret;
        }
 
        if (of_property_read_u32(pdev->dev.of_node, "i2c-slave", &slave_phandle)) {