From patchwork Thu Feb 14 20:19:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 10813735 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E2C626C2 for ; Thu, 14 Feb 2019 20:23:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D33F120855 for ; Thu, 14 Feb 2019 20:23:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C75E821FAC; Thu, 14 Feb 2019 20:23:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8250C20855 for ; Thu, 14 Feb 2019 20:23:55 +0000 (UTC) Received: from localhost ([127.0.0.1]:54525 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1guNY2-0001t4-QS for patchwork-qemu-devel@patchwork.kernel.org; Thu, 14 Feb 2019 15:23:54 -0500 Received: from eggs.gnu.org ([209.51.188.92]:42779) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1guNUp-0000NE-CO for qemu-devel@nongnu.org; Thu, 14 Feb 2019 15:20:36 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1guNUn-0005n8-FW for qemu-devel@nongnu.org; Thu, 14 Feb 2019 15:20:35 -0500 Received: from mx1.redhat.com ([209.132.183.28]:54454) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1guNUd-0005Ux-RF for qemu-devel@nongnu.org; Thu, 14 Feb 2019 15:20:25 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A47E880E5D; Thu, 14 Feb 2019 20:20:16 +0000 (UTC) Received: from x1w.redhat.com (ovpn-204-144.brq.redhat.com [10.40.204.144]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B3DB319C65; Thu, 14 Feb 2019 20:20:13 +0000 (UTC) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: Prasad J Pandit , =?utf-8?q?Marc-Andr=C3=A9_Lurea?= =?utf-8?q?u?= , qemu-devel@nongnu.org, Paolo Bonzini Date: Thu, 14 Feb 2019 21:19:34 +0100 Message-Id: <20190214201939.494-5-philmd@redhat.com> In-Reply-To: <20190214201939.494-1-philmd@redhat.com> References: <20190214201939.494-1-philmd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 14 Feb 2019 20:20:16 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 4/9] ccid-card-passthru: Let the chardev::read() be more generic X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Suggested-by: Paolo Bonzini Signed-off-by: Philippe Mathieu-Daudé --- hw/usb/ccid-card-passthru.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/hw/usb/ccid-card-passthru.c b/hw/usb/ccid-card-passthru.c index 0c44b38fc2..ba7c285ded 100644 --- a/hw/usb/ccid-card-passthru.c +++ b/hw/usb/ccid-card-passthru.c @@ -285,8 +285,14 @@ static void ccid_card_vscard_read(void *opaque, const uint8_t *buf, int size) card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader); hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr); } - if (card->vscard_in_hdr == card->vscard_in_pos) { - card->vscard_in_pos = card->vscard_in_hdr = 0; + + /* Drop any messages that were fully processed. */ + if (card->vscard_in_hdr > 0) { + memmove(card->vscard_in_data, + card->vscard_in_data + card->vscard_in_hdr, + card->vscard_in_pos - card->vscard_in_hdr); + card->vscard_in_pos -= card->vscard_in_hdr; + card->vscard_in_hdr = 0; } }