From patchwork Fri Apr 12 08:15:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Yi L" X-Patchwork-Id: 13627138 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 7EE6E5102B for ; Fri, 12 Apr 2024 08:15:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712909740; cv=none; b=Vz4e7at1apGsKwhKOttwc45SU/9nT4/Hbl47io/Gb9SJ7GWhx5G1Ed0Xy0g5qzEi/2hyygZeBUii53SsdYG/yijSG2kuEyHRiVEBwnZlJuyKEMFCF0jr9BMlUGhtZmmSCywTH6sBpTbHtxD/r8VuURSYWtNDV50OEOgikc3zKJA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712909740; c=relaxed/simple; bh=VbKNr1VzuHL0JQ6LpoEN602hRMaWoWJn/sxBUpLCH6w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=EuCi4rVOf25jGUlah+gxADNUgFdhu8d11OoeLxkH6gpXdLdKapGzO9yWa0Eaz9UKTTVz6sAl2LgaBx/rBl2YJ0S6dXGpOYDcJa/pdGbI2URrNnDaO/TZNzNo8VVQ7uyFTDct2Hr5OFsIsmAjNx6KDMZN3RHTXxOByt6GvPnoX88= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=XwsePGJM; arc=none smtp.client-ip=198.175.65.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="XwsePGJM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1712909739; x=1744445739; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VbKNr1VzuHL0JQ6LpoEN602hRMaWoWJn/sxBUpLCH6w=; b=XwsePGJMXFT/4fBnAGaJv5W/KXSd1EYD3ZhYWNKBgprtEwBhkxs8eOta 9x1wThxwGYd0hn6U6hQDlzGUZH5mOVn+xbKjk0SuYHGGwfTQdR0aBHR9k IBymcA0IhQgxPJ4k8Gzkc0M6UyVMoq3nKAENVykTdbvfIpWidSVQpf9h+ 18o6CCYfwk1aSbD7D0nqqwp3E939r5cpJ23eXS6LxvQPU41JPlVaKMw4u ppvFzmgQ8PCljBto+1UD33yzewCPXEbBEofSGuN67l13TnF8FS9YS6dcV Mf6vhQB/pm2mYeW4M81J/qVHheCi1mjaC/Vqn4lsKMFu4pZT1In7x7wfZ w==; X-CSE-ConnectionGUID: /s+7or3sT3CqzQvQ64nIZA== X-CSE-MsgGUID: 2RJUyYEiSEmNvLNWKX8Ojg== X-IronPort-AV: E=McAfee;i="6600,9927,11041"; a="8465107" X-IronPort-AV: E=Sophos;i="6.07,195,1708416000"; d="scan'208";a="8465107" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2024 01:15:38 -0700 X-CSE-ConnectionGUID: r6KZQcsvTkWjs995ZdOV9g== X-CSE-MsgGUID: l3tgAg2aRHeBQ2zY932b0w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,195,1708416000"; d="scan'208";a="52137877" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orviesa002.jf.intel.com with ESMTP; 12 Apr 2024 01:15:36 -0700 From: Yi Liu To: joro@8bytes.org, jgg@nvidia.com, kevin.tian@intel.com, baolu.lu@linux.intel.com Cc: alex.williamson@redhat.com, robin.murphy@arm.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, iommu@lists.linux.dev, zhenzhong.duan@intel.com, jacob.jun.pan@intel.com Subject: [PATCH v2 10/12] iommu/vt-d: Return if no dev_pasid is found in domain Date: Fri, 12 Apr 2024 01:15:14 -0700 Message-Id: <20240412081516.31168-11-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240412081516.31168-1-yi.l.liu@intel.com> References: <20240412081516.31168-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 If no dev_pasid is found, it should be a problem of caller. So a WARN_ON is fine, but no need to go further as nothing to be cleanup and also it may hit unknown issue. Signed-off-by: Yi Liu --- drivers/iommu/intel/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index df49aed3df5e..fff7dea012a7 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4614,8 +4614,9 @@ static void intel_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid, break; } } - WARN_ON_ONCE(!dev_pasid); spin_unlock_irqrestore(&dmar_domain->lock, flags); + if (WARN_ON_ONCE(!dev_pasid)) + return; domain_detach_iommu(dmar_domain, iommu); intel_iommu_debugfs_remove_dev_pasid(dev_pasid);