linux-kernel - [PATCH v2 1/2] staging: wfx: fix an error handling in wfx_init

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Date:   Fri, 18 Feb 2022 21:59:45 +0800
From:   xkernel.wang@...mail.com
To:     jerome.pouiller@...abs.com, gregkh@...uxfoundation.org,
        dan.carpenter@...cle.com
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH v2 1/2] staging: wfx: fix an error handling in wfx_init_common()

From: Xiaoke Wang <xkernel.wang@...mail.com>

One error handler of wfx_init_common() return without calling
ieee80211_free_hw(hw), which may result in memory leak. And I add
one err label to unify the error handler, which is useful for the
subsequent changes.

Suggested-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
Changelog
v1->v2 restore the wrong modification of a return statement.
 drivers/staging/wfx/main.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
index 4b9fdf9..9ff69c5 100644
--- a/drivers/staging/wfx/main.c
+++ b/drivers/staging/wfx/main.c
@@ -309,7 +309,8 @@ struct wfx_dev *wfx_init_common(struct device *dev,
 	wdev->pdata.gpio_wakeup = devm_gpiod_get_optional(dev, "wakeup",
 							  GPIOD_OUT_LOW);
 	if (IS_ERR(wdev->pdata.gpio_wakeup))
-		return NULL;
+		goto err;
+
 	if (wdev->pdata.gpio_wakeup)
 		gpiod_set_consumer_name(wdev->pdata.gpio_wakeup, "wfx wakeup");
 
@@ -328,6 +329,10 @@ struct wfx_dev *wfx_init_common(struct device *dev,
 		return NULL;
 
 	return wdev;
+
+err:
+	ieee80211_free_hw(hw);
+	return NULL;
 }
 
 int wfx_probe(struct wfx_dev *wdev)
--