linux-kernel - [PATCH] i2c: ocores: add missing unwind goto in `ocores_i2c

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Date:   Sun, 16 Apr 2023 15:20:40 +0800
From:   Wang Zhang <silver_code@...t.edu.cn>
To:     Peter Korsgaard <peter@...sgaard.com>, Andrew Lunn <andrew@...n.ch>
Cc:     Wang Zhang <silver_code@...t.edu.cn>,
        Dongliang Mu <dzm91@...t.edu.cn>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] i2c: ocores: add missing unwind goto in `ocores_i2c_probe`

platform_get_irq_optional is a function used to obtain an IRQ
number for a device on a platform. The function returns the IRQ number
associated with the specified device, or a negative error code if it fails.

The error handling code after the err_clk label should be executed to
release any resources that were allocated for the clock if a negative
error code returned.

Fix this by assigning irq to ret and changing the direct return to err_clk.

Signed-off-by: Wang Zhang <silver_code@...t.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
---
 drivers/i2c/busses/i2c-ocores.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index a0af027db04c..95efad5a5a28 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -697,8 +697,10 @@ static int ocores_i2c_probe(struct platform_device *pdev)
 	if (irq == -ENXIO) {
 		ocores_algorithm.master_xfer = ocores_xfer_polling;
 	} else {
-		if (irq < 0)
-			return irq;
+		if (irq < 0) {
+			ret = irq;
+			goto err_clk;
+		}
 	}
 
 	if (ocores_algorithm.master_xfer != ocores_xfer_polling) {
-- 
2.34.1