• Wolfram Sang's avatar
    rtc: ep93xx: Initialize drvdata before registering device · 92d921c5
    Wolfram Sang authored
    Commit f44f7f96 ("RTC: Initialize kernel state from RTC") uncovered
    an issue in a number of RTC drivers, where the drivers call
    rtc_device_register before initializing the device or platform drvdata.
    
    This frequently results in null pointer dereferences when the
    rtc_device_register immediately makes use of the rtc device, calling
    rtc_read_alarm.
    
    The solution is to ensure the drvdata is initialized prior to registering
    the rtc device.
    
    CC: Alessandro Zummo <a.zummo@towertech.it>
    CC: Thomas Gleixner <tglx@linutronix.de>
    CC: rtc-linux@googlegroups.com
    Signed-off-by: default avatarWolfram Sang <w.sang@pengutronix.de>
    [Fixed up commit log -jstultz]
    Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
    92d921c5
rtc-ep93xx.c 5.22 KB