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Commita203728ac6("pinctrl: core: Return selector to the pinctrl driver") and commitf913cfce4e("pinctrl: pinmux: Return selector to the pinctrl driver") modified the return values of pinctrl_generic_add_group() and pinmux_generic_add_function() respectively, but did so without updating their callers. This broke the pinctrl-ingenic driver, which treats non-zero return values from these functions as errors & fails to probe. For example on a MIPS Ci20: pinctrl-ingenic 10010000.pin-controller: Failed to register group uart0-hwflow pinctrl-ingenic: probe of 10010000.pin-controller failed with error 1 Without the pinctrl driver probed, other drivers go on to fail to probe too & the system is unusable. Fix this by modifying the error checks to treat only negative values as errors, matching the commits that introduced the breakage & similar changes made to other drivers. Signed-off-by: Paul Burton <paul.burton@mips.com> Fixes:a203728ac6("pinctrl: core: Return selector to the pinctrl driver") Fixes:f913cfce4e("pinctrl: pinmux: Return selector to the pinctrl driver") Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Tony Lindgren <tony@atomide.com> Cc: linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.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.