regulator: gpio: properly check return value of of_get_named_gpio

The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER
-EINVAL and so on. Currently, for the optional property "enable-gpio",
we only check -EPROBE_DEFER, this is not enough since there may be
misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return
-EINVAL in this case, we should return immediately here. And for the
optional property "gpios", we didn't check the return value, the driver
will continue to the point where gpio_request_array() is called, it
doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here.

This patch tries to address these two issues by properly checking the
return value of of_get_named_gpio.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

path: root/sound/soc/txx9/Kconfig

##
## TXx9 ACLC
##
config SND_SOC_TXX9ACLC
	tristate "SoC Audio for TXx9"
	depends on HAS_TXX9_ACLC && TXX9_DMAC
	help
	  This option enables support for the AC Link Controllers in TXx9 SoC.

config HAS_TXX9_ACLC
	bool

config SND_SOC_TXX9ACLC_AC97
	tristate
	select AC97_BUS
	select SND_AC97_CODEC
	select SND_SOC_AC97_BUS


##
## Boards
##
config SND_SOC_TXX9ACLC_GENERIC
	tristate "Generic TXx9 ACLC sound machine"
	depends on SND_SOC_TXX9ACLC
	select SND_SOC_TXX9ACLC_AC97
	select SND_SOC_AC97_CODEC
	help
	  This is a generic AC97 sound machine for use in TXx9 based systems.