drivers/video/exynos/exynos_mipi_dsi.c: use devm_* APIs

devm_* APIs are device managed and make exit and cleanup code simpler.
While at it also remove some unused labels and fix an error path.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Donghwa Lee <dh09.lee@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/exynos/exynos_mipi_dsi.c b/drivers/video/exynos/exynos_mipi_dsi.c
index f623dfc..fac7df6 100644 (file)
--- a/drivers/video/exynos/exynos_mipi_dsi.c
+++ b/drivers/video/exynos/exynos_mipi_dsi.c
@@ -338,7 +338,8 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
        struct mipi_dsim_ddi *dsim_ddi;
        int ret = -EINVAL;
 
-       dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
+       dsim = devm_kzalloc(&pdev->dev, sizeof(struct mipi_dsim_device),
+                               GFP_KERNEL);
        if (!dsim) {
                dev_err(&pdev->dev, "failed to allocate dsim object.\n");
                return -ENOMEM;
@@ -352,13 +353,13 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
        dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd;
        if (dsim_pd == NULL) {
                dev_err(&pdev->dev, "failed to get platform data for dsim.\n");
-               goto err_clock_get;
+               return -EINVAL;
        }
        /* get mipi_dsim_config. */
        dsim_config = dsim_pd->dsim_config;
        if (dsim_config == NULL) {
                dev_err(&pdev->dev, "failed to get dsim config data.\n");
-               goto err_clock_get;
+               return -EINVAL;
        }
 
        dsim->dsim_config = dsim_config;
@@ -366,41 +367,28 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
 
        mutex_init(&dsim->lock);
 
-       ret = regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies), supplies);
+       ret = devm_regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies),
+                                       supplies);
        if (ret) {
                dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret);
-               goto err_clock_get;
+               return ret;
        }
 
-       dsim->clock = clk_get(&pdev->dev, "dsim0");
+       dsim->clock = devm_clk_get(&pdev->dev, "dsim0");
        if (IS_ERR(dsim->clock)) {
                dev_err(&pdev->dev, "failed to get dsim clock source\n");
-               ret = -ENODEV;
-               goto err_clock_get;
+               return -ENODEV;
        }
 
        clk_enable(dsim->clock);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "failed to get io memory region\n");
-               ret = -ENODEV;
-               goto err_platform_get;
-       }
-
-       dsim->res = request_mem_region(res->start, resource_size(res),
-                                       dev_name(&pdev->dev));
-       if (!dsim->res) {
-               dev_err(&pdev->dev, "failed to request io memory region\n");
-               ret = -ENOMEM;
-               goto err_mem_region;
-       }
 
-       dsim->reg_base = ioremap(res->start, resource_size(res));
+       dsim->reg_base = devm_request_and_ioremap(&pdev->dev, res);
        if (!dsim->reg_base) {
                dev_err(&pdev->dev, "failed to remap io region\n");
                ret = -ENOMEM;
-               goto err_ioremap;
+               goto error;
        }
 
        mutex_init(&dsim->lock);
@@ -410,26 +398,27 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
        if (!dsim_ddi) {
                dev_err(&pdev->dev, "mipi_dsim_ddi object not found.\n");
                ret = -EINVAL;
-               goto err_bind;
+               goto error;
        }
 
        dsim->irq = platform_get_irq(pdev, 0);
        if (IS_ERR_VALUE(dsim->irq)) {
                dev_err(&pdev->dev, "failed to request dsim irq resource\n");
                ret = -EINVAL;
-               goto err_platform_get_irq;
+               goto error;
        }
 
        init_completion(&dsim_wr_comp);
        init_completion(&dsim_rd_comp);
        platform_set_drvdata(pdev, dsim);
 
-       ret = request_irq(dsim->irq, exynos_mipi_dsi_interrupt_handler,
+       ret = devm_request_irq(&pdev->dev, dsim->irq,
+                       exynos_mipi_dsi_interrupt_handler,
                        IRQF_SHARED, dev_name(&pdev->dev), dsim);
        if (ret != 0) {
                dev_err(&pdev->dev, "failed to request dsim irq\n");
                ret = -EINVAL;
-               goto err_bind;
+               goto error;
        }
 
        /* enable interrupts */
@@ -471,22 +460,8 @@ done:
 
        return 0;
 
-err_bind:
-       iounmap(dsim->reg_base);
-
-err_ioremap:
-       release_mem_region(dsim->res->start, resource_size(dsim->res));
-
-err_mem_region:
-       release_resource(dsim->res);
-
-err_platform_get:
+error:
        clk_disable(dsim->clock);
-       clk_put(dsim->clock);
-err_clock_get:
-       kfree(dsim);
-
-err_platform_get_irq:
        return ret;
 }
 
@@ -496,13 +471,7 @@ static int exynos_mipi_dsi_remove(struct platform_device *pdev)
        struct mipi_dsim_ddi *dsim_ddi, *next;
        struct mipi_dsim_lcd_driver *dsim_lcd_drv;
 
-       iounmap(dsim->reg_base);
-
        clk_disable(dsim->clock);
-       clk_put(dsim->clock);
-
-       release_resource(dsim->res);
-       release_mem_region(dsim->res->start, resource_size(dsim->res));
 
        list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
                if (dsim_ddi) {
@@ -518,9 +487,6 @@ static int exynos_mipi_dsi_remove(struct platform_device *pdev)
                }
        }
 
-       regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
-       kfree(dsim);
-
        return 0;
 }
 

diff --git a/include/video/exynos_mipi_dsim.h b/include/video/exynos_mipi_dsim.h
index 83ce5e6..89dc88a 100644 (file)
--- a/include/video/exynos_mipi_dsim.h
+++ b/include/video/exynos_mipi_dsim.h
@@ -220,7 +220,6 @@ struct mipi_dsim_config {
 struct mipi_dsim_device {
        struct device                   *dev;
        int                             id;
-       struct resource                 *res;
        struct clk                      *clock;
        unsigned int                    irq;
        void __iomem                    *reg_base;