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[ Upstream commitb39c0615d0] dev_get_drvdata() is called in img_pwm_runtime_resume() before the driver data is set. When pm_runtime_enabled() returns false in img_pwm_probe() it calls img_pwm_runtime_resume() which results in a null pointer access. This patch fixes the problem by setting the driver data earlier in the img_pwm_probe() function. This crash was seen when booting the Imagination Technologies Creator Ci40 (Marduk) with kernel 5.4 in OpenWrt. Fixes:e690ae5262("pwm: img: Add runtime PM") Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.