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 62C6F1F6694; Tue, 3 Dec 2024 14:38:15 +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=1733236695; cv=none; b=vCUBV3VdNfgHilkaMjrG5RULA7eG7RF1PGMJqkcKxrB5Q1tvhMQ4whPvWkq5u3kj5S0Q0OlSA11SqBIh3q2KyvFIquLizq6ybRTeA5Nhld/sFYsUumQN5VgghctFAkmF+DPSPCiQsSfKtqd9jjtZ6be+FVFupBynTucyh4TYqMw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733236695; c=relaxed/simple; bh=rAkKprn/TSbaHjnqTaZw/w199xV9PR4Py0yfCzjSOkc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aAXBSBcFWvBF3PxH0PRtIC69ogulCFjRSubXhRFEzxrVXn6Q7JtjEM2M7z43CAWLAKHtlLPqQHUV6Sohzah1J6lyXcprtoIXhYAQXeTpTcarWgOHqQT+9eq/IgrZQQipdlzVCA3ZSeAmnBu/FTsZ4zQbjD/r9E4DVV3pCQFZmzs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r7gJUhjC; 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="r7gJUhjC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82623C4CECF; Tue, 3 Dec 2024 14:38:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733236695; bh=rAkKprn/TSbaHjnqTaZw/w199xV9PR4Py0yfCzjSOkc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r7gJUhjCPKTMXtn1BSLN9eFJ1FYFo/mXckj4KYlMsB0gkyVaen4ID7WwPtyPEA2aN HoRwExHDy4mmpbUdkwZ1WUxdhgeCEs/SrwlJJ992/kK0FBzXq/jx1YEoZV6bJf9G3j ahJ2A5SEeWBdTWoQlV5yA8RNWaT8GR3ZldpYNAec= 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 4.19 092/138] marvell: pxa168_eth: fix call balance of pep->clk handling routines Date: Tue, 3 Dec 2024 15:32:01 +0100 Message-ID: <20241203141927.087895689@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241203141923.524658091@linuxfoundation.org> References: <20241203141923.524658091@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 4.19-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 | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c index 0d6a4e47e7a50..962d7046801cf 100644 --- a/drivers/net/ethernet/marvell/pxa168_eth.c +++ b/drivers/net/ethernet/marvell/pxa168_eth.c @@ -1417,18 +1417,15 @@ 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); @@ -1541,8 +1538,6 @@ 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; } -- 2.43.0