From patchwork Sat Apr 4 09:40:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11474107 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 62E91912 for ; Sat, 4 Apr 2020 09:41:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 40B6020719 for ; Sat, 4 Apr 2020 09:41:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="E5rDDKMw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 40B6020719 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2FEBD6E0CC; Sat, 4 Apr 2020 09:41:25 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by gabe.freedesktop.org (Postfix) with ESMTPS id D95996E081; Sat, 4 Apr 2020 09:41:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=FjP6zoayZ1fjLTQ5J40k73xEcDLUAFsLpp9ITbvNuIc=; b=E5rDDKMwWfrap1JfG6yNklw4O2 GNgNgDdFmbxfo1fUVp5J1gaGFscM2Apu4SX2zjRhB1+YnuUkrq4wHrSoK6KStx9kPDNIH/ANmeneN wQ02zm0tKQ1R6ebfTq6wzZkFEMzwXBcqrmfyGf8xA5tZRYW83fb+mtQ8J+8dagGuRpquxFp/Q68nq FW1kAC2RNliuc7Tp/7ADj02HUyYGYkHXUO6rqnrjgGwA1crPkLp/2s+nq7pS6OYTuy64eguvFMaLD xOAvUjLwiu/DrMQZbyP3jl7d3qekyjoqtsaLSBWrrQVdwUV+JywA4azyO0oEnsF6xvSa20P+kDcLL Ntn9iIgQ==; Received: from [2001:4bb8:180:7914:2ca6:9476:bbfa:a4d0] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jKfIc-0002d1-GL; Sat, 04 Apr 2020 09:41:11 +0000 From: Christoph Hellwig To: Linus Torvalds , Andrew Morton Date: Sat, 4 Apr 2020 11:40:57 +0200 Message-Id: <20200404094101.672954-3-hch@lst.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200404094101.672954-1-hch@lst.de> References: <20200404094101.672954-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Subject: [Intel-gfx] [PATCH 2/6] i915/gvt/kvm: a NULL ->mm does not mean a thread is a kthread X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jens Axboe , Felipe Balbi , amd-gfx@lists.freedesktop.org, "Michael S. Tsirkin" , Felix Kuehling , linux-usb@vger.kernel.org, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Al Viro , intel-gfx@lists.freedesktop.org, Alex Deucher , intel-gvt-dev@lists.freedesktop.org, Jason Wang Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Use the proper API instead. Fixes: f440c8a572d7 ("drm/i915/gvt/kvmgt: read/write GPA via KVM API") Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 074c4efb58eb..5848400620b4 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -2037,7 +2037,7 @@ static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa, struct kvmgt_guest_info *info; struct kvm *kvm; int idx, ret; - bool kthread = current->mm == NULL; + bool kthread = (current->flags & PF_KTHREAD); if (!handle_valid(handle)) return -ESRCH;