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[ Upstream commit8816cd726a] In function mc13xxx_rtc_probe, the mc13xxx_unlock() is called before rtc_register_device(). But in the error path of rtc_register_device(), the mc13xxx_unlock() is called again, which causes a double-unlock problem. Thus add a call of the function “mc13xxx_lock” in an if branch for the completion of the exception handling. Fixes:e4ae7023e1("rtc: mc13xxx: set range") Signed-off-by: Qiushi Wu <wu000273@umn.edu> Link: https://lore.kernel.org/r/20200503182235.1652-1-wu000273@umn.edu Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.