From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44818) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XIFkW-0002VA-PL for qemu-devel@nongnu.org; Fri, 15 Aug 2014 07:32:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XIFkO-0008M9-Jo for qemu-devel@nongnu.org; Fri, 15 Aug 2014 07:32:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:29581) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XIFkO-0008KX-Bo for qemu-devel@nongnu.org; Fri, 15 Aug 2014 07:32:40 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s7FBWdPj025466 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 15 Aug 2014 07:32:39 -0400 From: Markus Armbruster Date: Fri, 15 Aug 2014 13:32:36 +0200 Message-Id: <1408102357-914-2-git-send-email-armbru@redhat.com> In-Reply-To: <1408102357-914-1-git-send-email-armbru@redhat.com> References: <1408102357-914-1-git-send-email-armbru@redhat.com> Subject: [Qemu-devel] [PATCH 1/2] usb: Fix bootindex for portnr > 9 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, lersek@redhat.com, kraxel@redhat.com, stefanha@redhat.com We identify devices by their Open Firmware device paths. The encoding of the host controller and hub port numbers is incorrect: usb_get_fw_dev_path() formats them in decimal, while SeaBIOS uses hexadecimal. When some port number > 9, SeaBIOS will miss the bootindex (lucky case), or apply it to another device (unlucky case). The relevant spec[*] agrees with SeaBIOS (and OVMF, for that matter). Change %d to %x. Bug can bite only with host controllers or hubs sporting more than ten ports. I'm not aware of any. [*] Open Firmware Recommended Practice: Universal Serial Bus, Version 1, Section 3.2.1 Device Node Address Representation http://www.openfirmware.org/1275/bindings/usb/usb-1_0.ps Signed-off-by: Markus Armbruster --- hw/usb/bus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/usb/bus.c b/hw/usb/bus.c index 927a47b..516fb52 100644 --- a/hw/usb/bus.c +++ b/hw/usb/bus.c @@ -589,11 +589,11 @@ static char *usb_get_fw_dev_path(DeviceState *qdev) nr = strtol(in, &in, 10); if (in[0] == '.') { /* some hub between root port and device */ - pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr); + pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr); in++; } else { /* the device itself */ - pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld", + pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx", qdev_fw_name(qdev), nr); break; } -- 1.9.3