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[3/4] spi: cs42l43: Make handling missing spk-id GPIOs explicit

Message ID 20250104205437.184782-3-krzysztof.kozlowski@linaro.org
State New
Headers show
Series [1/4] spi: atmel-quadspi: Fix struct atmel_qspi_pcal kerneldoc | expand

Commit Message

Krzysztof Kozlowski Jan. 4, 2025, 8:54 p.m. UTC 
gpiod_get_array_optional() for spk-id GPIOs can return NULL, if they are
missing, so do not pass the value to PTR_ERR but instead explicitly
treat NULL as acceptable condition.  The old code was correct, but
misleading because PTR_ERR usually is used on errors.

Reported by Smatch:
  drivers/spi/spi-cs42l43.c:241 cs42l43_get_speaker_id_gpios() warn: passing zero to 'PTR_ERR'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 drivers/spi/spi-cs42l43.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-cs42l43.c b/drivers/spi/spi-cs42l43.c
index ceefc253c549..90180662c4c2 100644
--- a/drivers/spi/spi-cs42l43.c
+++ b/drivers/spi/spi-cs42l43.c
@@ -237,7 +237,9 @@  static int cs42l43_get_speaker_id_gpios(struct cs42l43_spi *priv, int *result)
 	int i, ret;
 
 	descs = gpiod_get_array_optional(priv->dev, "spk-id", GPIOD_IN);
-	if (IS_ERR_OR_NULL(descs))
+	if (!descs)
+		return 0;
+	else if (IS_ERR_OR_NULL(descs))
 		return PTR_ERR(descs);
 
 	spkid = 0;