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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham 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 E9F80C433E0 for ; Sat, 30 May 2020 23:20:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C34372067B for ; Sat, 30 May 2020 23:20:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729530AbgE3XUe (ORCPT ); Sat, 30 May 2020 19:20:34 -0400 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:51188 "EHLO kvm5.telegraphics.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729517AbgE3XUe (ORCPT ); Sat, 30 May 2020 19:20:34 -0400 Received: by kvm5.telegraphics.com.au (Postfix, from userid 502) id 5FCE927F1F; Sat, 30 May 2020 19:20:33 -0400 (EDT) To: Benjamin Herrenschmidt Cc: Joshua Thompson , linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Message-Id: <996f835d2f3d90baaaf9ee954e252d06e8886c6f.1590880623.git.fthain@telegraphics.com.au> In-Reply-To: References: From: Finn Thain Subject: [PATCH 2/8] macintosh/adb-iop: Correct comment text Date: Sun, 31 May 2020 09:17:03 +1000 Sender: linux-m68k-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org This patch improves comment style and corrects some misunderstandings in the text. Cc: Joshua Thompson Tested-by: Stan Johnson Signed-off-by: Finn Thain --- drivers/macintosh/adb-iop.c | 29 +++++++++++++---------------- 1 file changed, 13 insertions(+), 16 deletions(-) diff --git a/drivers/macintosh/adb-iop.c b/drivers/macintosh/adb-iop.c index ce28ff40fb9c..ca3b411b0742 100644 --- a/drivers/macintosh/adb-iop.c +++ b/drivers/macintosh/adb-iop.c @@ -101,11 +101,10 @@ static void adb_iop_listen(struct iop_msg *msg) req = current_req; - /* Handle a timeout. Timeout packets seem to occur even after */ - /* we've gotten a valid reply to a TALK, so I'm assuming that */ - /* a "timeout" is actually more like an "end-of-data" signal. */ - /* We need to send back a timeout packet to the IOP to shut */ - /* it up, plus complete the current request, if any. */ + /* Handle a timeout. Timeout packets seem to occur even after + * we've gotten a valid reply to a TALK, presumably because of + * autopolling. + */ if (amsg->flags & ADB_IOP_TIMEOUT) { msg->reply[0] = ADB_IOP_TIMEOUT | ADB_IOP_AUTOPOLL; @@ -115,9 +114,6 @@ static void adb_iop_listen(struct iop_msg *msg) adb_iop_end_req(req, idle); } } else { - /* TODO: is it possible for more than one chunk of data */ - /* to arrive before the timeout? If so we need to */ - /* use reply_ptr here like the other drivers do. */ if ((adb_iop_state == awaiting_reply) && (amsg->flags & ADB_IOP_EXPLICIT)) { req->reply_len = amsg->count + 1; @@ -152,23 +148,24 @@ static void adb_iop_start(void) local_irq_save(flags); - /* The IOP takes MacII-style packets, so */ - /* strip the initial ADB_PACKET byte. */ - + /* The IOP takes MacII-style packets, so strip the initial + * ADB_PACKET byte. + */ amsg.flags = ADB_IOP_EXPLICIT; amsg.count = req->nbytes - 2; - /* amsg.data immediately follows amsg.cmd, effectively making */ - /* amsg.cmd a pointer to the beginning of a full ADB packet. */ + /* amsg.data immediately follows amsg.cmd, effectively making + * &amsg.cmd a pointer to the beginning of a full ADB packet. + */ memcpy(&amsg.cmd, req->data + 1, req->nbytes - 1); req->sent = 1; adb_iop_state = sending; local_irq_restore(flags); - /* Now send it. The IOP manager will call adb_iop_complete */ - /* when the packet has been sent. */ - + /* Now send it. The IOP manager will call adb_iop_complete + * when the message has been sent. + */ iop_send_message(ADB_IOP, ADB_CHAN, req, sizeof(amsg), (__u8 *)&amsg, adb_iop_complete); } -- 2.26.2