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| author | Alessandro Zummo <a.zummo@towertech.it> | 2014-04-03 14:49:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:21:16 -0700 |
| commit | 4071ea25cc08d41002746cca2d69ac700d67a2ac (patch) | |
| tree | 43cf44f8265b885c8c1e4e81f0ced5c6babb53c7 /drivers/rtc/rtc-ds1553.c | |
| parent | a68b31080912dae377bee4994716b357dc74286d (diff) | |
| download | linux-stable-4071ea25cc08d41002746cca2d69ac700d67a2ac.tar.gz linux-stable-4071ea25cc08d41002746cca2d69ac700d67a2ac.tar.bz2 linux-stable-4071ea25cc08d41002746cca2d69ac700d67a2ac.zip | |
rtc: fix potential race condition
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>
Diffstat (limited to 'drivers/rtc/rtc-ds1553.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1553.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c index fd31571941f5..9ac2fa07dffa 100644 --- a/drivers/rtc/rtc-ds1553.c +++ b/drivers/rtc/rtc-ds1553.c @@ -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) |