linux-kernel - [PATCH] mtd: rawnand: gpmi: don't leak PM reference in error path

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Date:   Tue, 25 Jan 2022 09:16:19 +0100
From:   Christian Eggers <ceggers@...i.de>
To:     Han Xu <han.xu@....com>, Miquel Raynal <miquel.raynal@...tlin.com>
CC:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Stefan Riedmueller <s.riedmueller@...tec.de>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Pavel Machek <pavel@...x.de>,
        Christian Eggers <ceggers@...i.de>, <stable@...r.kernel.org>
Subject: [PATCH] mtd: rawnand: gpmi: don't leak PM reference in error path

If gpmi_nfc_apply_timings() fails, the PM runtime usage counter must be
dropped.

Reported-by: Pavel Machek <pavel@...x.de>
Fixes: f53d4c109a66 ("mtd: rawnand: gpmi: Add ERR007117 protection for nfc_apply_timings")
Signed-off-by: Christian Eggers <ceggers@...i.de>
Cc: stable@...r.kernel.org
---
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 3 ++-
 1 file changed, 2 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 1b64c5a5140d..ded4df473928 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -2285,7 +2285,7 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
 		this->hw.must_apply_timings = false;
 		ret = gpmi_nfc_apply_timings(this);
 		if (ret)
-			return ret;
+			goto out_pm;
 	}
 
 	dev_dbg(this->dev, "%s: %d instructions\n", __func__, op->ninstrs);
@@ -2414,6 +2414,7 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
 
 	this->bch = false;
 
+out_pm:
 	pm_runtime_mark_last_busy(this->dev);
 	pm_runtime_put_autosuspend(this->dev);
 
-- 
Christian Eggers
Embedded software developer

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