linux-kernel - [PATCH AUTOSEL 5.4 13/79] i2c: pxa: fix call balance of i2c->clk handling routines

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Message-Id: <20250505232151.2698893-13-sashal@kernel.org>
Date: Mon,  5 May 2025 19:20:45 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Vitalii Mordan <mordan@...ras.ru>,
	Andi Shyti <andi.shyti@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	linux-i2c@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 13/79] i2c: pxa: fix call balance of i2c->clk handling routines

From: Vitalii Mordan <mordan@...ras.ru>

[ Upstream commit be7113d2e2a6f20cbee99c98d261a1fd6fd7b549 ]

If the clock i2c->clk was not enabled in i2c_pxa_probe(), it should not be
disabled in any path.

Found by Linux Verification Center (linuxtesting.org) with Klever.

Signed-off-by: Vitalii Mordan <mordan@...ras.ru>
Signed-off-by: Andi Shyti <andi.shyti@...nel.org>
Link: https://lore.kernel.org/r/20250212172803.1422136-1-mordan@ispras.ru
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i2c/busses/i2c-pxa.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index d0c557c8d80f5..c5a6e7527baf7 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1284,7 +1284,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
 				i2c->adap.name);
 	}
 
-	clk_prepare_enable(i2c->clk);
+	ret = clk_prepare_enable(i2c->clk);
+	if (ret)
+		return dev_err_probe(&dev->dev, ret,
+				     "failed to enable clock\n");
 
 	if (i2c->use_pio) {
 		i2c->adap.algo = &i2c_pxa_pio_algorithm;
-- 
2.39.5