diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-04-03 16:46:56 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-04-04 12:58:18 +0700 |
| commit | 1723fdec5fcbc4de3d26bbb23a9e1704ee258955 (patch) | |
| tree | ad1bf2ead03c46e6edeacec0fbd98634cf06edf4 /drivers/spi/spi.c | |
| parent | 807195f2103f8662f8c0f9baf71dd7bc1a6b745b (diff) | |
| download | linux-1723fdec5fcbc4de3d26bbb23a9e1704ee258955.tar.bz2 | |
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 <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 2 |
1 files changed, 2 insertions, 0 deletions
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]) { /* |