From: Geert Uytterhoeven Date: Wed, 3 Apr 2019 14:46:56 +0000 (+0200) Subject: spi: Add missing error handling for CS GPIOs X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=1723fdec5fcbc4de3d26bbb23a9e1704ee258955;p=android-x86%2Fkernel.git spi: Add missing error handling for CS GPIOs While devm_gpiod_get_index_optional() returns NULL if the GPIO is not present (i.e. -ENOENT), it may still return other error codes, like -EPROBE_DEFER. Currently these are not handled, leading to unrecoverable failures later in case of probe deferral: gpiod_set_consumer_name: invalid GPIO (errorpointer) gpiod_direction_output: invalid GPIO (errorpointer) gpiod_set_value_cansleep: invalid GPIO (errorpointer) gpiod_set_value_cansleep: invalid GPIO (errorpointer) gpiod_set_value_cansleep: invalid GPIO (errorpointer) Detect and propagate errors to fix this. Fixes: f3186dd876697e69 ("spi: Optionally use GPIO descriptors for CS GPIOs") Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 2be394d3bc59..7b6494bd8a9b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2197,6 +2197,8 @@ static int spi_get_gpio_descs(struct spi_controller *ctlr) */ cs[i] = devm_gpiod_get_index_optional(dev, "cs", i, GPIOD_OUT_LOW); + if (IS_ERR(cs[i])) + return PTR_ERR(cs[i]); if (cs[i]) { /*