linux-kernel - [PATCH 5.15 343/530] mfd: lp8788: Fix an error handling path in lp8788

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Date:   Mon, 24 Oct 2022 13:31:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Lee Jones <lee@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 343/530] mfd: lp8788: Fix an error handling path in lp8788_probe()

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit becfdcd75126b20b8ec10066c5e85b34f8994ad5 ]

Should an error occurs in mfd_add_devices(), some resources need to be
released, as already done in the .remove() function.

Add an error handling path and a lp8788_irq_exit() call to undo a previous
lp8788_irq_init().

Fixes: eea6b7cc53aa ("mfd: Add lp8788 mfd driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Lee Jones <lee@...nel.org>
Link: https://lore.kernel.org/r/18398722da9df9490722d853e4797350189ae79b.1659261275.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mfd/lp8788.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/lp8788.c b/drivers/mfd/lp8788.c
index c223d2c6a363..998e8cc408a0 100644
--- a/drivers/mfd/lp8788.c
+++ b/drivers/mfd/lp8788.c
@@ -195,8 +195,16 @@ static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	if (ret)
 		return ret;
 
-	return mfd_add_devices(lp->dev, -1, lp8788_devs,
-			       ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
+	ret = mfd_add_devices(lp->dev, -1, lp8788_devs,
+			      ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
+	if (ret)
+		goto err_exit_irq;
+
+	return 0;
+
+err_exit_irq:
+	lp8788_irq_exit(lp);
+	return ret;
 }
 
 static int lp8788_remove(struct i2c_client *cl)
-- 
2.35.1