[PATCH 4.9 135/207] mtd: spi-nor: hisi-sfc: Remove excessive clk_disable_unprepare()

[Greg Kroah-Hartman]

From: Evgeny Novikov <novikov@xxxxxxxxx>

[ Upstream commit 78e4d342187625585932bb437ec26e1060f7fc6f ]

hisi_spi_nor_probe() invokes clk_disable_unprepare() on all paths after
successful call of clk_prepare_enable(). Besides, the clock is enabled by
hispi_spi_nor_prep() and disabled by hispi_spi_nor_unprep(). So at remove
time it is not possible to have the clock enabled. The patch removes
excessive clk_disable_unprepare() from hisi_spi_nor_remove().

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: e523f11141bd ("mtd: spi-nor: add hisilicon spi-nor flash controller driver")
Signed-off-by: Evgeny Novikov <novikov@xxxxxxxxx>
Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
Reviewed-by: Pratyush Yadav <p.yadav@xxxxxx>
Link: https://lore.kernel.org/r/20210709144529.31379-1-novikov@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/mtd/spi-nor/hisi-sfc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/hisi-sfc.c b/drivers/mtd/spi-nor/hisi-sfc.c
index 68be79ba571df..a0c2101f0b486 100644
--- a/drivers/mtd/spi-nor/hisi-sfc.c
+++ b/drivers/mtd/spi-nor/hisi-sfc.c
@@ -467,7 +467,6 @@ static int hisi_spi_nor_remove(struct platform_device *pdev)
 
 	hisi_spi_nor_unregister_all(host);
 	mutex_destroy(&host->lock);
-	clk_disable_unprepare(host->clk);
 	return 0;
 }
 
-- 
2.33.0