linux-kernel - [PATCH][V2] usb: ohci-da8xx: ensure error return on variable error is set

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Message-Id: <20200107103035.19481-1-colin.king@canonical.com>
Date:   Tue,  7 Jan 2020 10:30:35 +0000
From:   Colin King <colin.king@...onical.com>
To:     Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sekhar Nori <nsekhar@...com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-usb@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][V2] usb: ohci-da8xx: ensure error return on variable error is set

From: Colin Ian King <colin.king@...onical.com>

Currently when an error in da8xx_ohci->oc_gpio occurs it causes an
uninitialized error return in variable 'error' to be returned.  Fix
this by ensuring the error variable is set to the error value in
da8xx_ohci->oc_gpio.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: d193abf1c913 ("usb: ohci-da8xx: add vbus and overcurrent gpios")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---

V2: fix typo and grammar in commit message

---
 drivers/usb/host/ohci-da8xx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 38183ac438c6..9cdf787055b7 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -415,8 +415,10 @@ static int ohci_da8xx_probe(struct platform_device *pdev)
 	}
 
 	da8xx_ohci->oc_gpio = devm_gpiod_get_optional(dev, "oc", GPIOD_IN);
-	if (IS_ERR(da8xx_ohci->oc_gpio))
+	if (IS_ERR(da8xx_ohci->oc_gpio)) {
+		error = PTR_ERR(da8xx_ohci->oc_gpio);
 		goto err;
+	}
 
 	if (da8xx_ohci->oc_gpio) {
 		oc_irq = gpiod_to_irq(da8xx_ohci->oc_gpio);
-- 
2.24.0