From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id BE511C433EF for ; Thu, 9 Jun 2022 18:36:12 +0000 (UTC) Received: from localhost ([::1]:53364 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nzN0r-0000nO-UG for qemu-devel@archiver.kernel.org; Thu, 09 Jun 2022 14:36:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56334) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nzLro-0007uA-Qj for qemu-devel@nongnu.org; Thu, 09 Jun 2022 13:22:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:48743) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nzLre-0003g7-6A for qemu-devel@nongnu.org; Thu, 09 Jun 2022 13:22:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1654795341; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2CriZ0ti06dDP+qppflQjeyfKuVpeOf5E4VoqyKBJYc=; b=Qaew6YPdOEbX5a70oBUpSsD0L6gzoiYjtyitMt5LjSnl6Dr25LtAP8KKIjjNV922SVGbAs Y8DFODBebzYk+Ue3+8krjtahwvsfmLZmxEsXsYsScVpicmamHPkQ9AY09AUz0qINXmyMz9 5bsdL6wtr2LFA19m9rRP1yRJNNhgGk0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-164-LoLQf9QxM3uJmlvffxlLAA-1; Thu, 09 Jun 2022 13:22:18 -0400 X-MC-Unique: LoLQf9QxM3uJmlvffxlLAA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E287C811E75; Thu, 9 Jun 2022 17:22:17 +0000 (UTC) Received: from merkur.redhat.com (unknown [10.39.195.10]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3DA30404E4B5; Thu, 9 Jun 2022 17:22:17 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 06/18] block: Support passing NULL ops to blk_set_dev_ops() Date: Thu, 9 Jun 2022 19:21:37 +0200 Message-Id: <20220609172149.293877-7-kwolf@redhat.com> In-Reply-To: <20220609172149.293877-1-kwolf@redhat.com> References: <20220609172149.293877-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Xie Yongji This supports passing NULL ops to blk_set_dev_ops() so that we can remove stale ops in some cases. Signed-off-by: Xie Yongji Reviewed-by: Stefan Hajnoczi Message-Id: <20220523084611.91-2-xieyongji@bytedance.com> Signed-off-by: Kevin Wolf --- block/block-backend.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/block-backend.c b/block/block-backend.c index d4abdf8faa..f425b00793 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1058,7 +1058,7 @@ void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, blk->dev_opaque = opaque; /* Are we currently quiesced? Should we enforce this right now? */ - if (blk->quiesce_counter && ops->drained_begin) { + if (blk->quiesce_counter && ops && ops->drained_begin) { ops->drained_begin(opaque); } } -- 2.35.3