[PATCH AUTOSEL 5.4 302/330] mtd: rawnand: gpmi: Fix runtime PM imbalance on error

Sasha Levin
2020-09-18T02:07:40Z

From: Dinghao Liu <dinghao.liu@zju.edu.cn>

[ Upstream commit 550e68ea36a6671a96576c0531685ce6e6c0d19d ]

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200522095139.19653-1-dinghao.liu@zju.edu.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index b9d5d55a5edb9..ef89947ee3191 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -540,8 +540,10 @@ static int bch_set_geometry(struct gpmi_nand_data *this)
return ret;

ret = pm_runtime_get_sync(this->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(this->dev);
return ret;
+ }

/*
* Due to erratum #2847 of the MX23, the BCH cannot be soft reset on this
--
2.25.1