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driver: base: pinctrl: return error from pinctrl_bind_pins() 

strict pin controller returns -EINVAL in case of pin request which
is already claimed by somebody else.
Following is the sequence of calling pin_request() from
pinctrl_bind_pins():-
pinctrl_bind_pins()->pinctrl_select_state()->pinmux_enable_setting()->
pin_request()

But pinctrl_bind_pins() only returns -EPROBE_DEFER which makes device
driver probe successful even if the pin request is rejected by the pin
controller subsystem.

This commit modifies pinctrl_bind_pins() to return error if the pin is
rejected by pin control subsystem.

Signed-off-by: Deepak Das <deepak_das@mentor.com>
[Rewrote to be cleaner]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Deepak 2016-09-13 12:43:04 +05:30 committed by Linus Walleij
parent 9b5fb0ca5d
commit eb4ec68acf
1 changed files with 8 additions and 4 deletions
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12
drivers/base/pinctrl.c
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@ -91,9 +91,13 @@ cleanup_alloc:
devm_kfree(dev, dev->pins); devm_kfree(dev, dev->pins);
dev->pins = NULL; dev->pins = NULL;
/* Only return deferrals */ /* Return deferrals */
if (ret != -EPROBE_DEFER) if (ret == -EPROBE_DEFER)
ret = 0;
return ret; return ret;
/* Return serious errors */
if (ret == -EINVAL)
return ret;
/* We ignore errors like -ENOENT meaning no pinctrl state */
return 0;
} }