[PATCH 5.10 650/717] spi: npcm-fiu: Disable clock in probe error path

Greg Kroah-Hartman
2020-12-28T14:39:10Z

From: Lukas Wunner <lukas@wunner.de>

commit 234266a5168bbe8220d263e3aa7aa80cf921c483 upstream.

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>
Link: https://lore.kernel.org/r/9ae62f4e1cfe542bec57ac2743e6fca9f9548f55.1607286887.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/spi/spi-npcm-fiu.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/spi/spi-npcm-fiu.c
+++ b/drivers/spi/spi-npcm-fiu.c
@@ -677,7 +677,7 @@ static int npcm_fiu_probe(struct platfor
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 platfor
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)