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| author |   Feng Tang <feng.tang@intel.com> | 2011-04-07 09:39:44 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2011-04-07 11:27:42 +0200 |
| commit | de97a21a23dda34f1754a748560dede139e6bfc2 (patch) | |
| tree | 7d6300b10d5b105c39e8d2857075a646a242a974 /drivers/rtc/rtc-mrst.c | |
| parent | Linux 2.6.39-rc2 (diff) | |
| download | wireguard-linux-de97a21a23dda34f1754a748560dede139e6bfc2.tar.xz wireguard-linux-de97a21a23dda34f1754a748560dede139e6bfc2.zip | |
rtc, x86/mrst/vrtc: Fix boot crash in rtc_read_alarm()
Commit f44f7f96a20 ("RTC: Initialize kernel state from RTC") caused a
boot regression on the MRST platform.
The reason is that rtc_device_register() calls rtc_read_alarm() after
that change, which function does not have all driver data set up yet.
The rtc-mrst driver needs to call dev_set_drvdata() before rtc_device_register()
gets called.
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1302140384-27571-1-git-send-email-feng.tang@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/rtc/rtc-mrst.c')
| -rw-r--r-- | drivers/rtc/rtc-mrst.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c index 332a2c4a891c..b2f096871a97 100644 --- a/drivers/rtc/rtc-mrst.c +++ b/drivers/rtc/rtc-mrst.c @@ -342,6 +342,8 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) mrst_rtc.irq = rtc_irq; mrst_rtc.iomem = iomem; + mrst_rtc.dev = dev; + dev_set_drvdata(dev, &mrst_rtc); mrst_rtc.rtc = rtc_device_register(driver_name, dev, &mrst_rtc_ops, THIS_MODULE); @@ -350,8 +352,6 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) goto cleanup0; } - mrst_rtc.dev = dev; - dev_set_drvdata(dev, &mrst_rtc); rename_region(iomem, dev_name(&mrst_rtc.rtc->dev)); spin_lock_irq(&rtc_lock); @@ -376,9 +376,10 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) return 0; cleanup1: - mrst_rtc.dev = NULL; rtc_device_unregister(mrst_rtc.rtc); cleanup0: + dev_set_drvdata(dev, NULL); + mrst_rtc.dev = NULL; release_region(iomem->start, iomem->end + 1 - iomem->start); dev_err(dev, "rtc-mrst: unable to initialise\n"); return retval; |