From patchwork Fri May 22 07:53:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 11564925 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 E59FA13B1 for ; Fri, 22 May 2020 08:05:12 +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 C58B7206DD for ; Fri, 22 May 2020 08:05:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C58B7206DD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.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]:47890 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jc2g3-0007WF-TS for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 May 2020 04:05:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44758) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jc2fV-0005qz-MF for qemu-devel@nongnu.org; Fri, 22 May 2020 04:04:37 -0400 Received: from mga17.intel.com ([192.55.52.151]:30270) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jc2fU-0006To-Ts for qemu-devel@nongnu.org; Fri, 22 May 2020 04:04:37 -0400 IronPort-SDR: 3t84r01eM67lKphdIzRSxdOz6VB10tP9izZ+C3dthKBLNhzC6x22o5VlGUczJmL7DSYSXcw+YR 0507GsPTZc6Q== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 May 2020 01:04:36 -0700 IronPort-SDR: 5vpbpwSs5AeTRpH/ktP3MUtupsP9qY3YzreOdDDcfQlaRk7cdIIQDkd42XZt1IAu7vy4h5FZIR yLBT73lHkofg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,420,1583222400"; d="scan'208";a="467104545" Received: from unknown (HELO localhost.localdomain) ([10.239.13.19]) by fmsmga005.fm.intel.com with ESMTP; 22 May 2020 01:04:34 -0700 From: Zhang Chen To: Jason Wang Subject: [PATCH V2 2/7] chardev/char.c: Use qemu_co_sleep_ns if in coroutine Date: Fri, 22 May 2020 15:53:52 +0800 Message-Id: <20200522075357.19883-3-chen.zhang@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200522075357.19883-1-chen.zhang@intel.com> References: <20200522075357.19883-1-chen.zhang@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.151; envelope-from=chen.zhang@intel.com; helo=mga17.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/22 04:04:33 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, FROM_ADDR_WS=2.999, FROM_WSP_TRAIL=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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: Zhang Chen , Lukas Straub , qemu-dev , Zhang Chen Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Lukas Straub This will be needed in the next patch so compare_chr_send can be converted to a coroutine. Signed-off-by: Lukas Straub Reviewed-by: Marc-André Lureau Reviewed-by: Zhang Chen Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Zhang Chen --- chardev/char.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/chardev/char.c b/chardev/char.c index ea06c5ff4d..e3051295ac 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -38,6 +38,7 @@ #include "qemu/module.h" #include "qemu/option.h" #include "qemu/id.h" +#include "qemu/coroutine.h" #include "chardev/char-mux.h" @@ -119,7 +120,11 @@ static int qemu_chr_write_buffer(Chardev *s, retry: res = cc->chr_write(s, buf + *offset, len - *offset); if (res < 0 && errno == EAGAIN && write_all) { - g_usleep(100); + if (qemu_in_coroutine()) { + qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 100000); + } else { + g_usleep(100); + } goto retry; }