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rtc: fix potential race condition

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RTC drivers must not return an error after device registration.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Reported-by: Ales Novak <alnovak@suse.cz>
Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alessandro Zummo
2014-04-03 14:49:36 -07:00
committed by Linus Torvalds
parent a68b310809
commit 4071ea25cc
9 changed files with 70 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/rtc/rtc-ds1553.c
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@@ -278,7 +278,6 @@ static struct bin_attribute ds1553_nvram_attr = {
static int ds1553_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
struct resource *res;
unsigned int cen, sec;
struct rtc_plat_data *pdata;
@@ -311,6 +310,12 @@ static int ds1553_rtc_probe(struct platform_device *pdev)
spin_lock_init(&pdata->lock);
pdata->last_jiffies = jiffies;
platform_set_drvdata(pdev, pdata);
pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&ds1553_rtc_ops, THIS_MODULE);
if (IS_ERR(pdata->rtc))
return PTR_ERR(pdata->rtc);
if (pdata->irq > 0) {
writeb(0, ioaddr + RTC_INTERRUPTS);
if (devm_request_irq(&pdev->dev, pdata->irq,
@@ -321,15 +326,12 @@ static int ds1553_rtc_probe(struct platform_device *pdev)
}
}
rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&ds1553_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
pdata->rtc = rtc;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
if (ret)
dev_err(&pdev->dev, "unable to create sysfs file: %s\n",
ds1553_nvram_attr.attr.name);
return ret;
return 0;
}
static int ds1553_rtc_remove(struct platform_device *pdev)