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 3863E2054EF; Thu, 12 Dec 2024 16:56:19 +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=1734022579; cv=none; b=MkuOwXKiWfP4gpkZOvI97uNlsF5oH31IJxsb0ALJCYydtSY8GkbsaFeyf5IUoY/2wBSJe7TI+uTrQqzRf3Z9BenLfonPNjnhOmzXXMoHdeJhvOMAW/rnkxBxldyLuqZHUrT1CRpEBELmFab5i5C0LifdCryAU/Ol/T8cn8Sn2lY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734022579; c=relaxed/simple; bh=dbCQrxVbfP0Hi7AmV2DSmdzMCTd9R6DPFMcFni3QBAs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BqkZY4IV0/Tunk/odv8spKPg77S3UbGZJZHzc8KAA5X738QUHXtU08wGHzFu4MqxRoBG3XmYBzsSGVrk3UmvciEBOmNjoSxuGqtp7gpctdQrvOlE58q7DEqOkYcHQCTsIyxjxLLauHXn74VGaaXLtWsfXQmFn/+/4nH/9wm8F4c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=HWXtnjE5; 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="HWXtnjE5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E11AC4CED3; Thu, 12 Dec 2024 16:56:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734022579; bh=dbCQrxVbfP0Hi7AmV2DSmdzMCTd9R6DPFMcFni3QBAs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HWXtnjE5+s6L8rGKtCHmzOC/z/3qSNbWHgSZa4XiZEcqvNkm5Ix1n4jRZjLDwnGle lS1kFLqeK8hpoGeNCSMerXjzEDDsnaYYlzfefEK7R/e+BGXF1ENetVcG6qfYsrJbq1 Zf9Sgakp0f8x4KuY1VXNt7GpnIVWsxl2gC5D86oo= 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 5.15 279/565] marvell: pxa168_eth: fix call balance of pep->clk handling routines Date: Thu, 12 Dec 2024 15:57:54 +0100 Message-ID: <20241212144322.483788608@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212144311.432886635@linuxfoundation.org> References: <20241212144311.432886635@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-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 11ef1d8dea15c..a202320c26985 100644 --- a/drivers/net/ethernet/marvell/pxa168_eth.c +++ b/drivers/net/ethernet/marvell/pxa168_eth.c @@ -1396,18 +1396,15 @@ 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); @@ -1518,8 +1515,6 @@ 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; } @@ -1537,7 +1532,6 @@ static int 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