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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92EBDC4361B for ; Tue, 15 Dec 2020 11:11:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C0CD22255 for ; Tue, 15 Dec 2020 11:11:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728234AbgLOLLp (ORCPT ); Tue, 15 Dec 2020 06:11:45 -0500 Received: from mx2.suse.de ([195.135.220.15]:49714 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727406AbgLOLLo (ORCPT ); Tue, 15 Dec 2020 06:11:44 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1608030658; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Yx7SevcBUttZRGBUgn4zpJi1UCc9qXZWWCyxJCQZZZI=; b=NV7BwIrwiGRFQaAQ96DIiW1UlD6Hby+vHIu/rM2INcEJ1fag87Bf4iwtbi51xV/LVwhL4h 8vQ2G9q4P3cv2r+JkeedQ6A/lETc6SGYmEbelS/G9TIUSq5fWDNBu0M8Hiqz3azUYnoYa2 yLUH8ytqC/GKmzvACYDQwY9AVnV1Yxw= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id BF0FAAC7F; Tue, 15 Dec 2020 11:10:58 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Juergen Gross , Boris Ostrovsky , Stefano Stabellini Subject: [PATCH v2] xen/xenbus: make xs_talkv() interruptible Date: Tue, 15 Dec 2020 12:10:55 +0100 Message-Id: <20201215111055.3810-1-jgross@suse.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In case a process waits for any Xenstore action in the xenbus driver it should be interruptible by signals. Signed-off-by: Juergen Gross --- V2: - don't special case SIGKILL as libxenstore is handling -EINTR fine --- drivers/xen/xenbus/xenbus_xs.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c index 3a06eb699f33..17c8f8a155fd 100644 --- a/drivers/xen/xenbus/xenbus_xs.c +++ b/drivers/xen/xenbus/xenbus_xs.c @@ -205,8 +205,15 @@ static bool test_reply(struct xb_req_data *req) static void *read_reply(struct xb_req_data *req) { + int ret; + do { - wait_event(req->wq, test_reply(req)); + ret = wait_event_interruptible(req->wq, test_reply(req)); + + if (ret == -ERESTARTSYS && signal_pending(current)) { + req->msg.type = XS_ERROR; + return ERR_PTR(-EINTR); + } if (!xenbus_ok()) /* -- 2.26.2