From patchwork Thu Aug 27 03:58:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Zhijian X-Patchwork-Id: 11739909 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 9C96E13A4 for ; Thu, 27 Aug 2020 04:00:46 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 3D03B204FD for ; Thu, 27 Aug 2020 04:00:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3D03B204FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:55388 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kB95h-00073J-6n for patchwork-qemu-devel@patchwork.kernel.org; Thu, 27 Aug 2020 00:00:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kB94y-0006VE-M5 for qemu-devel@nongnu.org; Thu, 27 Aug 2020 00:00:00 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:51412 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kB94w-0004dl-Oh for qemu-devel@nongnu.org; Thu, 27 Aug 2020 00:00:00 -0400 X-IronPort-AV: E=Sophos;i="5.76,358,1592841600"; d="scan'208";a="98605503" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 27 Aug 2020 11:59:55 +0800 Received: from G08CNEXMBPEKD06.g08.fujitsu.local (unknown [10.167.33.206]) by cn.fujitsu.com (Postfix) with ESMTP id C98DD48990D9; Thu, 27 Aug 2020 11:59:53 +0800 (CST) Received: from G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.203) by G08CNEXMBPEKD06.g08.fujitsu.local (10.167.33.206) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 27 Aug 2020 11:59:54 +0800 Received: from FNSTPC.g08.fujitsu.local (10.167.226.45) by G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 27 Aug 2020 11:59:53 +0800 From: Li Zhijian To: , Subject: [PATCH v3] virtio-gpu: fix unmap the already mapped items Date: Thu, 27 Aug 2020 11:58:55 +0800 Message-ID: <20200827035855.24354-1-lizhijian@cn.fujitsu.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-yoursite-MailScanner-ID: C98DD48990D9.ACF94 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: lizhijian@cn.fujitsu.com Received-SPF: none client-ip=183.91.158.132; envelope-from=lizhijian@cn.fujitsu.com; helo=heian.cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/26 23:41:38 X-ACL-Warn: Detected OS = ??? X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Li Qiang , qemu-devel@nongnu.org, Li Zhijian Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" we go here either (!(*iov)[i].iov_base) or (len != l), so we need to consider to unmap the 'i'th item as well when the 'i'th item is not nil CC: Li Qiang Signed-off-by: Li Zhijian --- v2: address Gerd's comments v3: leave (*iov)[i].iov_len as the real mapped len (Li Qiang) --- hw/display/virtio-gpu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 5f0dd7c150..90be4e3ed7 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -646,9 +646,9 @@ int virtio_gpu_create_mapping_iov(VirtIOGPU *g, uint64_t a = le64_to_cpu(ents[i].addr); uint32_t l = le32_to_cpu(ents[i].length); hwaddr len = l; - (*iov)[i].iov_len = l; (*iov)[i].iov_base = dma_memory_map(VIRTIO_DEVICE(g)->dma_as, a, &len, DMA_DIRECTION_TO_DEVICE); + (*iov)[i].iov_len = len; if (addr) { (*addr)[i] = a; } @@ -656,6 +656,9 @@ int virtio_gpu_create_mapping_iov(VirtIOGPU *g, qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to map MMIO memory for" " resource %d element %d\n", __func__, ab->resource_id, i); + if ((*iov)[i].iov_base) { + i++; /* cleanup the 'i'th map */ + } virtio_gpu_cleanup_mapping_iov(g, *iov, i); g_free(ents); *iov = NULL;