[PATCH 16/17] spi: npcm-fiu: Disable clock in probe error path

[Lukas Wunner <lukas@wunner.de>]

If the call to devm_spi_register_master() fails on probe of the NPCM FIU
SPI driver, the clock "fiu->clk" is erroneously not unprepared and
disabled.  Fix it.

Fixes: ace55c411b11 ("spi: npcm-fiu: add NPCM FIU controller driver")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.4+
Cc: Tomer Maimon <tmaimon77@gmail.com>
---
 drivers/spi/spi-npcm-fiu.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-npcm-fiu.c b/drivers/spi/spi-npcm-fiu.c
index 1cb9329de945..b62471ab6d7f 100644
--- a/drivers/spi/spi-npcm-fiu.c
+++ b/drivers/spi/spi-npcm-fiu.c
@@ -677,7 +677,7 @@ static int npcm_fiu_probe(struct platform_device *pdev)
 	struct npcm_fiu_spi *fiu;
 	void __iomem *regbase;
 	struct resource *res;
-	int id;
+	int id, ret;
 
 	ctrl = devm_spi_alloc_master(dev, sizeof(*fiu));
 	if (!ctrl)
@@ -735,7 +735,11 @@ static int npcm_fiu_probe(struct platform_device *pdev)
 	ctrl->num_chipselect = fiu->info->max_cs;
 	ctrl->dev.of_node = dev->of_node;
 
-	return devm_spi_register_master(dev, ctrl);
+	ret = devm_spi_register_master(dev, ctrl);
+	if (ret)
+		clk_disable_unprepare(fiu->clk);
+
+	return ret;
 }
 
 static int npcm_fiu_remove(struct platform_device *pdev)
-- 
2.29.2