AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

drivers/rtc/rtc-tegra.c: clean up probe/remove routines

Browse Source 
Use the devres managed resource functions in the probe routine.  Also
affects the remove routine where the previously used free and release
functions are not needed.

The devm_* functions eliminate the need for manual resource releasing and
simplify error handling.  Resources allocated by devm_* are freed
automatically on driver detach.

Signed-off-by: Hannu Heikkinen <ext-hannu.m.heikkinen@nokia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hannu Heikkinen 2012-05-29 15:07:40 -07:00 committed by Linus Torvalds
parent ac2dee5984
commit 621bae79f1
1 changed files with 13 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/rtc/rtc-tegra.c
View File

@ -309,7 +309,8 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev)
struct resource *res;
int ret;
info = kzalloc(sizeof(struct tegra_rtc_info), GFP_KERNEL);
info = devm_kzalloc(&pdev->dev, sizeof(struct tegra_rtc_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
@ -317,29 +318,18 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev)
if (!res) {
dev_err(&pdev->dev,
"Unable to allocate resources for device.\n");
ret = -EBUSY;
goto err_free_info;
return -EBUSY;
}
if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
dev_err(&pdev->dev,
"Unable to request mem region for device.\n");
ret = -EBUSY;
goto err_free_info;
info->rtc_base = devm_request_and_ioremap(&pdev->dev, res);
if (!info->rtc_base) {
dev_err(&pdev->dev, "Unable to request mem region and grab IOs for device.\n");
return -EBUSY;
}
info->tegra_rtc_irq = platform_get_irq(pdev, 0);
if (info->tegra_rtc_irq <= 0) {
ret = -EBUSY;
goto err_release_mem_region;
}
info->rtc_base = ioremap_nocache(res->start, resource_size(res));
if (!info->rtc_base) {
dev_err(&pdev->dev, "Unable to grab IOs for device.\n");
ret = -EBUSY;
goto err_release_mem_region;
}
if (info->tegra_rtc_irq <= 0)
return -EBUSY;
/* set context info. */
info->pdev = pdev;
@ -362,11 +352,12 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev,
"Unable to register device (err=%d).\n",
ret);
goto err_iounmap;
return ret;
}
ret = request_irq(info->tegra_rtc_irq, tegra_rtc_irq_handler,
IRQF_TRIGGER_HIGH, "rtc alarm", &pdev->dev);
ret = devm_request_irq(&pdev->dev, info->tegra_rtc_irq,
tegra_rtc_irq_handler, IRQF_TRIGGER_HIGH,
"rtc alarm", &pdev->dev);
if (ret) {
dev_err(&pdev->dev,
"Unable to request interrupt for device (err=%d).\n",
@ -380,12 +371,6 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev)
err_dev_unreg:
rtc_device_unregister(info->rtc_dev);
err_iounmap:
iounmap(info->rtc_base);
err_release_mem_region:
release_mem_region(res->start, resource_size(res));
err_free_info:
kfree(info);
return ret;
}
@ -393,17 +378,8 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev)
static int __devexit tegra_rtc_remove(struct platform_device *pdev)
{
struct tegra_rtc_info *info = platform_get_drvdata(pdev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EBUSY;
free_irq(info->tegra_rtc_irq, &pdev->dev);
rtc_device_unregister(info->rtc_dev);
iounmap(info->rtc_base);
release_mem_region(res->start, resource_size(res));
kfree(info);
platform_set_drvdata(pdev, NULL);