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drm/fsl-dcu: disable clock on initialization failure and remove

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Fix error handling during probe by reordering initialization and
adding a error path which disables clock again. Also disable the
clock on remove.

Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Stefan Agner 2016-03-22 15:13:05 -07:00
parent 027b3f8ba9
commit 73fa30337a
1 changed files with 22 additions and 24 deletions
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46
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
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@ -290,6 +290,11 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
if (!fsl_dev)
return -ENOMEM;
id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
if (!id)
return -ENODEV;
fsl_dev->soc = id->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "could not get memory IO resource\n");
@ -308,24 +313,6 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
return -ENXIO;
}
fsl_dev->clk = devm_clk_get(dev, "dcu");
if (IS_ERR(fsl_dev->clk)) {
ret = PTR_ERR(fsl_dev->clk);
dev_err(dev, "failed to get dcu clock\n");
return ret;
}
ret = clk_prepare(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to prepare dcu clk\n");
return ret;
}
ret = clk_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
clk_unprepare(fsl_dev->clk);
return ret;
}
fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
&fsl_dcu_regmap_config);
if (IS_ERR(fsl_dev->regmap)) {
@ -333,14 +320,22 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
return PTR_ERR(fsl_dev->regmap);
}
id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
if (!id)
return -ENODEV;
fsl_dev->soc = id->data;
fsl_dev->clk = devm_clk_get(dev, "dcu");
if (IS_ERR(fsl_dev->clk)) {
dev_err(dev, "failed to get dcu clock\n");
return PTR_ERR(fsl_dev->clk);
}
ret = clk_prepare_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
return ret;
}
drm = drm_dev_alloc(driver, dev);
if (!drm)
return -ENOMEM;
if (!drm) {
ret = -ENOMEM;
goto disable_clk;
}
fsl_dev->dev = dev;
fsl_dev->drm = drm;
@ -360,6 +355,8 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
unref:
drm_dev_unref(drm);
disable_clk:
clk_disable_unprepare(fsl_dev->clk);
return ret;
}
@ -367,6 +364,7 @@ static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
clk_disable_unprepare(fsl_dev->clk);
drm_put_dev(fsl_dev->drm);
return 0;