linux-kernel - [PATCH] clk: versaclock7: Fix an error handling path in vc7

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Message-Id: <68c2fac5e774088437200aaeca8737a691bf951c.1679842132.git.christophe.jaillet@wanadoo.fr>
Date:   Sun, 26 Mar 2023 16:49:06 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Alex Helms <alexander.helms.jy@...esas.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-clk@...r.kernel.org
Subject: [PATCH] clk: versaclock7: Fix an error handling path in vc7_probe()

If an error code other than -EPROBE_DEFER is returned, it is likely that
there will be some trouble when:
   __clk_get_name(vc7->pin_xin)
is called a few lines below.

__clk_get_name() only checks for NULL.

Fixes: 48c5e98fedd9 ("clk: Renesas versaclock7 ccf device driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
This patch is speculative and compile tested only.
---
 drivers/clk/clk-versaclock7.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-versaclock7.c b/drivers/clk/clk-versaclock7.c
index 8e4f86e852aa..8d11e68e94b2 100644
--- a/drivers/clk/clk-versaclock7.c
+++ b/drivers/clk/clk-versaclock7.c
@@ -1111,8 +1111,8 @@ static int vc7_probe(struct i2c_client *client)
 	vc7->chip_info = of_device_get_match_data(&client->dev);
 
 	vc7->pin_xin = devm_clk_get(&client->dev, "xin");
-	if (PTR_ERR(vc7->pin_xin) == -EPROBE_DEFER) {
-		return dev_err_probe(&client->dev, -EPROBE_DEFER,
+	if (IS_ERR(vc7->pin_xin)) {
+		return dev_err_probe(&client->dev, PTR_ERR(vc7->pin_xin),
 				     "xin not specified\n");
 	}
 
-- 
2.34.1