linux-kernel - [PATCH] ALSA: hda: cs35l41: fix building without CONFIG

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Date: Wed,  3 Jan 2024 11:25:59 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: James Schulman <james.schulman@...rus.com>,
	David Rhodes <david.rhodes@...rus.com>,
	Richard Fitzgerald <rf@...nsource.cirrus.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Stefan Binding <sbinding@...nsource.cirrus.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Dorian Cruveiller <doriancruveiller@...il.com>,
	Yang Yingliang <yangyingliang@...wei.com>,
	alsa-devel@...a-project.org,
	patches@...nsource.cirrus.com,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: hda: cs35l41: fix building without CONFIG_SPI

From: Arnd Bergmann <arnd@...db.de>

When CONFIG_SPI is disabled, the driver produces unused-variable warning:

sound/pci/hda/cs35l41_hda_property.c: In function 'generic_dsd_config':
sound/pci/hda/cs35l41_hda_property.c:181:28: error: unused variable 'spi' [-Werror=unused-variable]
  181 |         struct spi_device *spi;
      |                            ^~~
sound/pci/hda/cs35l41_hda_property.c:180:27: error: unused variable 'cs_gpiod' [-Werror=unused-variable]
  180 |         struct gpio_desc *cs_gpiod;
      |                           ^~~~~~~~

Avoid these by turning the preprocessor contionals into equivalent C code,
which also helps readability.

Fixes: 916d051730ae ("ALSA: hda: cs35l41: Only add SPI CS GPIO if SPI is enabled in kernel")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 sound/pci/hda/cs35l41_hda_property.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sound/pci/hda/cs35l41_hda_property.c b/sound/pci/hda/cs35l41_hda_property.c
index 52820ca9c603..a51fb6b0f56d 100644
--- a/sound/pci/hda/cs35l41_hda_property.c
+++ b/sound/pci/hda/cs35l41_hda_property.c
@@ -215,7 +215,6 @@ static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physde
 	if (cs35l41->control_bus == SPI) {
 		cs35l41->index = id;
 
-#if IS_ENABLED(CONFIG_SPI)
 		/*
 		 * Manually set the Chip Select for the second amp <cs_gpio_index> in the node.
 		 * This is only supported for systems with 2 amps, since we cannot expand the
@@ -224,7 +223,7 @@ static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physde
 		 * uses a native chip select), to ensure the second amp does not clash with the
 		 * first.
 		 */
-		if (cfg->cs_gpio_index >= 0) {
+		if (IS_ENABLED(CONFIG_SPI) && cfg->cs_gpio_index >= 0) {
 			spi = to_spi_device(cs35l41->dev);
 
 			if (cfg->num_amps != 2) {
@@ -255,7 +254,6 @@ static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physde
 				spi_setup(spi);
 			}
 		}
-#endif
 	} else {
 		if (cfg->num_amps > 2)
 			/*
-- 
2.39.2