From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA8B12D7BF; Tue, 3 Dec 2024 15:22:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733239378; cv=none; b=Ap4bmFa34IH9Cg1fqa3qUP+fkwmngvfF2X7GFCK+XjFWwheMLlQWPG8qP5xAGu9YrHNOlL0Im6+VYwxyGf1sFHWCGwVhZcAPRgexhfO0CQQuL8EdUnHY5CFA+RJTeLHt0GC3X6ym7cNvcPKVx7iKNQc26IDR5CJ2W2M+jBOlqPM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733239378; c=relaxed/simple; bh=qygzK5HXTckJpa/BUEaFEAkoz58d5+uqG/d8K36ZCWA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ShVKzfOIADmYatk6I23Vs6bvKgbZN/SixLJvqzcQ/XjWln/F2ezn3GS/S1O6zPZbeSgRPs2vbJc5b3hcZJeOw42SK+lrQZbxi7kzhW9/g7NSS2Vxvo0esIDZLGuTREcqigFo4B0Y89AmU7Tm/t6EdWpaAaLGxN33UAVYn4KzaCg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Rm1utosH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Rm1utosH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 42EC0C4CECF; Tue, 3 Dec 2024 15:22:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733239378; bh=qygzK5HXTckJpa/BUEaFEAkoz58d5+uqG/d8K36ZCWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rm1utosHRE7S0iZ0bpxkcUQiKRGzhwXqTczMLbqng4qV/vw3m+4eL8rqrt4wyZxLa 6tcyjbjA0/dOEMuUY8SbpNIrf46lNImK+nBQ1wvV/DGaljS22L5TDx1HEYyKkX8iLP 4v/WRF3uXKLXOnNLdYVAOs83DXOJyZO9zj77KPr0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vitalii Mordan , Paolo Abeni , Sasha Levin Subject: [PATCH 6.11 576/817] marvell: pxa168_eth: fix call balance of pep->clk handling routines Date: Tue, 3 Dec 2024 15:42:28 +0100 Message-ID: <20241203144018.397137373@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241203143955.605130076@linuxfoundation.org> References: <20241203143955.605130076@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vitalii Mordan [ Upstream commit b032ae57d4fe2b2445e3bc190db6fcaa8c102f68 ] If the clock pep->clk was not enabled in pxa168_eth_probe, it should not be disabled in any path. Conversely, if it was enabled in pxa168_eth_probe, it must be disabled in all error paths to ensure proper cleanup. Use the devm_clk_get_enabled helper function to ensure proper call balance for pep->clk. Found by Linux Verification Center (linuxtesting.org) with Klever. Fixes: a49f37eed22b ("net: add Fast Ethernet driver for PXA168.") Signed-off-by: Vitalii Mordan Link: https://patch.msgid.link/20241121200658.2203871-1-mordan@ispras.ru Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/marvell/pxa168_eth.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c index 1a59c952aa01c..45f115e41857b 100644 --- a/drivers/net/ethernet/marvell/pxa168_eth.c +++ b/drivers/net/ethernet/marvell/pxa168_eth.c @@ -1394,18 +1394,15 @@ static int pxa168_eth_probe(struct platform_device *pdev) printk(KERN_NOTICE "PXA168 10/100 Ethernet Driver\n"); - clk = devm_clk_get(&pdev->dev, NULL); + clk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(clk)) { - dev_err(&pdev->dev, "Fast Ethernet failed to get clock\n"); + dev_err(&pdev->dev, "Fast Ethernet failed to get and enable clock\n"); return -ENODEV; } - clk_prepare_enable(clk); dev = alloc_etherdev(sizeof(struct pxa168_eth_private)); - if (!dev) { - err = -ENOMEM; - goto err_clk; - } + if (!dev) + return -ENOMEM; platform_set_drvdata(pdev, dev); pep = netdev_priv(dev); @@ -1523,8 +1520,6 @@ static int pxa168_eth_probe(struct platform_device *pdev) mdiobus_free(pep->smi_bus); err_netdev: free_netdev(dev); -err_clk: - clk_disable_unprepare(clk); return err; } @@ -1542,7 +1537,6 @@ static void pxa168_eth_remove(struct platform_device *pdev) if (dev->phydev) phy_disconnect(dev->phydev); - clk_disable_unprepare(pep->clk); mdiobus_unregister(pep->smi_bus); mdiobus_free(pep->smi_bus); unregister_netdev(dev); -- 2.43.0