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 600B28F74 for ; Sun, 16 Jul 2023 20:17:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6B43C433C8; Sun, 16 Jul 2023 20:17:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689538666; bh=rZ8cr4f6MXhE0fL75aITSnSdYoSLbEzaTc2DgnyWeyI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F6Q4KQetwhGdBq0e5u2PBfImSB5C6bkPlWoWpSQF+RDkustHWjwqldLMvabwVr+7w DP8+goD/5pYuVBYyhvn2sxha7tH4CYTziM3l1h9hxBPNVprEeuWQRKuVu9kIaHqQ+T byc7qYII2Rgs17nOxRd56/0T77ooRbSU7BPCli2Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , Dan Carpenter , Xinghui Li , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Nirmal Patel , Sasha Levin Subject: [PATCH 6.4 497/800] PCI: vmd: Fix uninitialized variable usage in vmd_enable_domain() Date: Sun, 16 Jul 2023 21:45:50 +0200 Message-ID: <20230716195000.624596910@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Xinghui Li [ Upstream commit 0c0206dc4f5ba2d18b15e24d2047487d6f73916b ] The ret variable in the vmd_enable_domain() function was used uninitialized when printing a warning message upon failure of the pci_reset_bus() function. Thus, fix the issue by assigning ret with the value returned from pci_reset_bus() before referencing it in the warning message. This was detected by Smatch: drivers/pci/controller/vmd.c:931 vmd_enable_domain() error: uninitialized symbol 'ret'. [kwilczynski: drop the second patch from the series, add missing reported by tag, commit log] Fixes: 0a584655ef89 ("PCI: vmd: Fix secondary bus reset for Intel bridges") Link: https://lore.kernel.org/all/202305270219.B96IiIfv-lkp@intel.com Link: https://lore.kernel.org/linux-pci/20230420094332.1507900-2-korantwork@gmail.com Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Xinghui Li Signed-off-by: Krzysztof Wilczyński Reviewed-by: Nirmal Patel Signed-off-by: Sasha Levin --- drivers/pci/controller/vmd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 30ec18283aaf4..e718a816d4814 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -927,7 +927,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) if (!list_empty(&child->devices)) { dev = list_first_entry(&child->devices, struct pci_dev, bus_list); - if (pci_reset_bus(dev)) + ret = pci_reset_bus(dev); + if (ret) pci_warn(dev, "can't reset device: %d\n", ret); break; -- 2.39.2