netdev - [PATCH] net: moxa: Fix a potential double 'free

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Message-Id: <20200426205921.47714-1-christophe.jaillet@wanadoo.fr>
Date:   Sun, 26 Apr 2020 22:59:21 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     davem@...emloft.net, jonas.jensen@...il.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] net: moxa: Fix a potential double 'free_irq()'

Should an irq requested with 'devm_request_irq' be released explicitly,
it should be done by 'devm_free_irq()', not 'free_irq()'.

Fixes: 6c821bd9edc9 ("net: Add MOXA ART SoCs ethernet driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Maybe 'devm_free_irq()' is useless here and it could be freed automatically
by the core framework, but sometimes irq can be tricky.
So I've preferred to keep the logic in place.
---
 drivers/net/ethernet/moxa/moxart_ether.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c
index e1651756bf9d..f70bb81e1ed6 100644
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -564,7 +564,7 @@ static int moxart_remove(struct platform_device *pdev)
 	struct net_device *ndev = platform_get_drvdata(pdev);
 
 	unregister_netdev(ndev);
-	free_irq(ndev->irq, ndev);
+	devm_free_irq(&pdev->dev, ndev->irq, ndev);
 	moxart_mac_free_memory(ndev);
 	free_netdev(ndev);
 
-- 
2.25.1