linux-kernel - [PATCH 5.16 152/227] mtd: rawnand: gpmi: dont leak PM reference in error path

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Message-Id: <20220221084939.884740253@linuxfoundation.org>
Date:   Mon, 21 Feb 2022 09:49:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Machek <pavel@...x.de>,
        Christian Eggers <ceggers@...i.de>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 5.16 152/227] mtd: rawnand: gpmi: dont leak PM reference in error path

From: Christian Eggers <ceggers@...i.de>

commit 9161f365c91614e5a3f5c6dcc44c3b1b33bc59c0 upstream.

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
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/20220125081619.6286-1-ceggers@arri.de
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -2291,7 +2291,7 @@ static int gpmi_nfc_exec_op(struct nand_
 		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);
@@ -2420,6 +2420,7 @@ unmap:
 
 	this->bch = false;
 
+out_pm:
 	pm_runtime_mark_last_busy(this->dev);
 	pm_runtime_put_autosuspend(this->dev);