From patchwork Thu Nov 24 17:04:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Keeping X-Patchwork-Id: 628530 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 5E0ADC433FE for ; Thu, 24 Nov 2022 17:04:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229472AbiKXREq (ORCPT ); Thu, 24 Nov 2022 12:04:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229379AbiKXREp (ORCPT ); Thu, 24 Nov 2022 12:04:45 -0500 Received: from metanate.com (unknown [IPv6:2001:8b0:1628:5005::111]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 979972B1BB; Thu, 24 Nov 2022 09:04:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=metanate.com; s=stronger; h=Content-Transfer-Encoding:Message-Id:Date: Subject:Cc:To:From:Content-Type:Reply-To:Content-ID:Content-Description: In-Reply-To:References; bh=/K9WVPVMPasDt2GUsLve9o5Zh3vIW7gvBXUy8+n3CAE=; b=cx gTekk7r1nQ3wMUXIJPF/+3zwT4r9xiA/sMJaffqqLN38HakS33On1EJAMj0ViA4ZfZxBiZ4D81ZLX Fi+IbRaglEGul1CpltlNRMXCgN2dvc5g7Ao83QmK5JV1V5dREDx3ffNoKvE6wL9xOlYA5K4pRPiHp 1pmxx7v+TOR7R248voHq3YUS4GXGOK1cvDYU83zSaSczRRkfJkIJoxGquMW/94uH6I3xoTh3bUtDh G3lCDoEmQ5UHulsP9VF+y9SMSJLBDSFwSsp060dAAdF9OxonSyhvcE8xzwaYs+1ewcmYygwkjp8MX RWtxjA5wltrHLfPd+wUiBRzKNhOdk+Dg==; Received: from [81.174.171.191] (helo=donbot.metanate.com) by email.metanate.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1oyFeO-0000NB-7e; Thu, 24 Nov 2022 17:04:36 +0000 From: John Keeping To: linux-usb@vger.kernel.org Cc: John Keeping , Linyu Yuan , Greg Kroah-Hartman , Shuah Khan , Wolfram Sang , Dan Carpenter , linux-kernel@vger.kernel.org Subject: [PATCH] usb: gadget: f_fs: use io_data->status consistently Date: Thu, 24 Nov 2022 17:04:28 +0000 Message-Id: <20221124170430.3998755-1-john@metanate.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 X-Authenticated: YES Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Commit fb1f16d74e26 ("usb: gadget: f_fs: change ep->status safe in ffs_epfile_io()") added a new ffs_io_data::status field to fix lifetime issues in synchronous requests. While there are no similar lifetime issues for asynchronous requests (the separate ep member in ffs_io_data avoids them) using the status field means the USB request can be freed earlier and that there is more consistency between the synchronous and asynchronous I/O paths. Cc: Linyu Yuan Signed-off-by: John Keeping Reviewed-by: Linyu Yuan --- drivers/usb/gadget/function/f_fs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 73dc10a77cde..1221f0d1b1a9 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -825,8 +825,7 @@ static void ffs_user_copy_worker(struct work_struct *work) { struct ffs_io_data *io_data = container_of(work, struct ffs_io_data, work); - int ret = io_data->req->status ? io_data->req->status : - io_data->req->actual; + int ret = io_data->status; bool kiocb_has_eventfd = io_data->kiocb->ki_flags & IOCB_EVENTFD; if (io_data->read && ret > 0) { @@ -840,8 +839,6 @@ static void ffs_user_copy_worker(struct work_struct *work) if (io_data->ffs->ffs_eventfd && !kiocb_has_eventfd) eventfd_signal(io_data->ffs->ffs_eventfd, 1); - usb_ep_free_request(io_data->ep, io_data->req); - if (io_data->read) kfree(io_data->to_free); ffs_free_buffer(io_data); @@ -856,6 +853,9 @@ static void ffs_epfile_async_io_complete(struct usb_ep *_ep, ENTER(); + io_data->status = req->status ? req->status : req->actual; + usb_ep_free_request(_ep, req); + INIT_WORK(&io_data->work, ffs_user_copy_worker); queue_work(ffs->io_completion_wq, &io_data->work); }