Harry Wentland 0461221316 drm/amd/display: Check hpd_gpio for NULL before accessing it
dal_gpio_open and dal_gpio_unlock_pin dereference hpd_gpio.
Check for NULL before calling those functions.

Fixes: ac627caf6b ("drm/amd/display: add gpio lock/unlock")
Reported-by: Przemek Socha <[email protected]>
CC: Chiawen Huang <[email protected]>
CC: Tony Cheng <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Tested-by: Alex Deucher <[email protected]>
Signed-off-by: Harry Wentland <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
2019-02-07 17:22:12 -05:00
…
…
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2019-01-04 14:27:09 -07:00
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2019-01-06 17:08:20 -08:00
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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.
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