From: Thomas Weißschuh <linux@weissschuh.net>
Date: Tue, 17 Jun 2025 17:08:12 +0000 (+0200)
Subject: spi: spi-nxp-fspi: Check return value of devm_mutex_init()
X-Git-Tag: v6.12.61~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c640adf07d874b9ba3c51eb6b56a9986dbcd616f;p=thirdparty%2Fkernel%2Fstable.git

spi: spi-nxp-fspi: Check return value of devm_mutex_init()

commit d24a54e032021cf381af3c3cf119cc5cf6b3c1be upstream.

devm_mutex_init() can fail. With CONFIG_DEBUG_MUTEXES=y the mutex will
be marked as unusable and trigger errors on usage.

Add the missed check.

Fixes: 48900813abd2 ("spi: spi-nxp-fspi: remove the goto in probe")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250617-must_check-devm_mutex_init-v7-1-d9e449f4d224@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index 5100b189c905..a43540d7995e 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -1249,7 +1249,9 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, ret, "Failed to request irq\n");
 	}
 
-	devm_mutex_init(dev, &f->lock);
+	ret = devm_mutex_init(dev, &f->lock);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to initialize lock\n");
 
 	ctlr->bus_num = -1;
 	ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT;