From owner-svn-src-all@freebsd.org Mon May 16 03:48:01 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 585F8B3C271; Mon, 16 May 2016 03:48:01 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 17CE6131E; Mon, 16 May 2016 03:48:01 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u4G3m0lN010978; Mon, 16 May 2016 03:48:00 GMT (envelope-from sephe@FreeBSD.org) Received: (from sephe@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u4G3m0Sg010977; Mon, 16 May 2016 03:48:00 GMT (envelope-from sephe@FreeBSD.org) Message-Id: <201605160348.u4G3m0Sg010977@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sephe set sender to sephe@FreeBSD.org using -f From: Sepherosa Ziehau Date: Mon, 16 May 2016 03:48:00 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r299889 - head/sys/dev/hyperv/vmbus X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 May 2016 03:48:01 -0000 Author: sephe Date: Mon May 16 03:48:00 2016 New Revision: 299889 URL: https://svnweb.freebsd.org/changeset/base/299889 Log: hyperv/vmbus: Simplify event processing While I'm here, remove useless comment and unnecessary return. MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D6332 Modified: head/sys/dev/hyperv/vmbus/hv_connection.c Modified: head/sys/dev/hyperv/vmbus/hv_connection.c ============================================================================== --- head/sys/dev/hyperv/vmbus/hv_connection.c Mon May 16 03:26:16 2016 (r299888) +++ head/sys/dev/hyperv/vmbus/hv_connection.c Mon May 16 03:48:00 2016 (r299889) @@ -300,7 +300,6 @@ hv_vmbus_on_events(int cpu) int rel_id; int maxdword; hv_vmbus_synic_event_flags *event; - /* int maxdword = PAGE_SIZE >> 3; */ KASSERT(cpu <= mp_maxid, ("VMBUS: hv_vmbus_on_events: " "cpu out of range!")); @@ -314,9 +313,12 @@ hv_vmbus_on_events(int cpu) /* * receive size is 1/2 page and divide that by 4 bytes */ - if (synch_test_and_clear_bit(0, &event->flags32[0])) + if (synch_test_and_clear_bit(0, &event->flags32[0])) { recv_interrupt_page = hv_vmbus_g_connection.recv_interrupt_page; + } else { + return; + } } else { /* * On Host with Win8 or above, the event page can be @@ -330,36 +332,32 @@ hv_vmbus_on_events(int cpu) /* * Check events */ - if (recv_interrupt_page != NULL) { - for (dword = 0; dword < maxdword; dword++) { - if (recv_interrupt_page[dword]) { - for (bit = 0; bit < HV_CHANNEL_DWORD_LEN; bit++) { - if (synch_test_and_clear_bit(bit, - (uint32_t *) &recv_interrupt_page[dword])) { - rel_id = (dword << 5) + bit; - if (rel_id == 0) { - /* - * Special case - - * vmbus channel protocol msg. - */ - continue; - } else { - hv_vmbus_channel * channel = hv_vmbus_g_connection.channels[rel_id]; - /* if channel is closed or closing */ - if (channel == NULL || channel->rxq == NULL) - continue; - - if (channel->batched_reading) - hv_ring_buffer_read_begin(&channel->inbound); - taskqueue_enqueue(channel->rxq, &channel->channel_task); - } - } - } - } + for (dword = 0; dword < maxdword; dword++) { + if (recv_interrupt_page[dword]) { + for (bit = 0; bit < HV_CHANNEL_DWORD_LEN; bit++) { + if (synch_test_and_clear_bit(bit, + (uint32_t *) &recv_interrupt_page[dword])) { + rel_id = (dword << 5) + bit; + if (rel_id == 0) { + /* + * Special case - + * vmbus channel protocol msg. + */ + continue; + } else { + hv_vmbus_channel * channel = hv_vmbus_g_connection.channels[rel_id]; + /* if channel is closed or closing */ + if (channel == NULL || channel->rxq == NULL) + continue; + + if (channel->batched_reading) + hv_ring_buffer_read_begin(&channel->inbound); + taskqueue_enqueue(channel->rxq, &channel->channel_task); + } + } + } } } - - return; } /**