This is a note to let you know that I've just added the patch titled mtd: spi-nor: hisi-sfc: Remove excessive clk_disable_unprepare() to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mtd-spi-nor-hisi-sfc-remove-excessive-clk_disable_un.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 22bab4c18de5a4ff1241f65f89e3c461dbc408d7 Author: Evgeny Novikov <novikov@xxxxxxxxx> Date: Fri Jul 9 17:45:29 2021 +0300 mtd: spi-nor: hisi-sfc: Remove excessive clk_disable_unprepare() [ 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> diff --git a/drivers/mtd/spi-nor/hisi-sfc.c b/drivers/mtd/spi-nor/hisi-sfc.c index 184ba5069ac51..36d2eb0918d9f 100644 --- a/drivers/mtd/spi-nor/hisi-sfc.c +++ b/drivers/mtd/spi-nor/hisi-sfc.c @@ -485,7 +485,6 @@ 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; }