From patchwork Wed Apr 6 10:08:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zongmin zhou X-Patchwork-Id: 559022 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5010C433EF for ; Wed, 6 Apr 2022 14:21:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234596AbiDFOXr (ORCPT ); Wed, 6 Apr 2022 10:23:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234619AbiDFOXc (ORCPT ); Wed, 6 Apr 2022 10:23:32 -0400 Received: from nksmu.kylinos.cn (mailgw.kylinos.cn [123.150.8.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96A74469EEC; Wed, 6 Apr 2022 03:29:46 -0700 (PDT) X-UUID: 7cb7a6c9f74e49218faa4d6d707341fe-20220406 X-UUID: 7cb7a6c9f74e49218faa4d6d707341fe-20220406 Received: from cs2c.com.cn [(172.17.111.24)] by nksmu.kylinos.cn (envelope-from ) (Generic MTA) with ESMTP id 1654346570; Wed, 06 Apr 2022 18:07:45 +0800 X-ns-mid: postfix-624D66AF-3551519497 Received: from localhost.localdomain (unknown [172.20.12.156]) by cs2c.com.cn (NSMail) with ESMTPA id 2D0F63848672; Wed, 6 Apr 2022 10:08:47 +0000 (UTC) From: Zongmin Zhou To: zackr@vmware.com, linux-graphics-maintainer@vmware.com, pv-drivers@vmware.com, dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, zhouzongmin@kylinos.cn Subject: [RESEND PATCH] input/vmmouse: Add vmmouse_reset() function to disable vmmouse before entering suspend mode Date: Wed, 6 Apr 2022 18:08:38 +0800 Message-Id: <20220406100838.610519-1-zhouzongmin@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220322021046.1087954-1-zhouzongmin@kylinos.cn> References: <20220322021046.1087954-1-zhouzongmin@kylinos.cn> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Details: When I use VirtualPS/2 VMMouse on virtual machine, There will be an error message after resume from suspend mode. like below: vmmouse: Unable to re-enable mouse when reconnecting, err: -6 And vmmouse will be unusable,so have to do full rescan to find a another driver to use for the port. This error is due to QEMU still generate PS2 events to notify kernel driver to read from queue, but kernel can't process the data in suspend mode, resulting a surge of s->nb_queue value, which ultimately led to an error getting VMMOUSE_VERSION_ID after resume. Test scenario: 1)virtual machine started with qemu command "vmport=on", it will use VirtualPS/2 VMMouse. 2)click suspend botton to enter suspend mode. 3)resume and will get the error message from dmesg. Fixed by: Disabling the vmmouse in its reset handler, It will notify qemu to stop vmmouse and remove handler. Signed-off-by: Zongmin Zhou --- drivers/input/mouse/vmmouse.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/input/mouse/vmmouse.c b/drivers/input/mouse/vmmouse.c index 42443ffba7c4..ea9eff7c8099 100644 --- a/drivers/input/mouse/vmmouse.c +++ b/drivers/input/mouse/vmmouse.c @@ -365,6 +365,19 @@ int vmmouse_detect(struct psmouse *psmouse, bool set_properties) return 0; } +/** + * vmmouse_reset - Disable vmmouse and reset + * + * @psmouse: Pointer to the psmouse struct + * + * Tries to disable vmmouse mode before enter suspend. + */ +static void vmmouse_reset(struct psmouse *psmouse) +{ + vmmouse_disable(psmouse); + psmouse_reset(psmouse); +} + /** * vmmouse_disconnect - Take down vmmouse driver * @@ -472,6 +485,7 @@ int vmmouse_init(struct psmouse *psmouse) psmouse->protocol_handler = vmmouse_process_byte; psmouse->disconnect = vmmouse_disconnect; psmouse->reconnect = vmmouse_reconnect; + psmouse->cleanup = vmmouse_reset; return 0;