From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:60790) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S5GYq-0005Xd-VR for qemu-devel@nongnu.org; Wed, 07 Mar 2012 08:05:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S5GYa-0008FA-1K for qemu-devel@nongnu.org; Wed, 07 Mar 2012 08:05:44 -0500 Received: from mx1.redhat.com ([209.132.183.28]:4140) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S5GYZ-0008EG-PX for qemu-devel@nongnu.org; Wed, 07 Mar 2012 08:05:27 -0500 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q27D5Q9G010233 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 7 Mar 2012 08:05:26 -0500 From: Gerd Hoffmann Date: Wed, 7 Mar 2012 14:05:08 +0100 Message-Id: <1331125520-13467-9-git-send-email-kraxel@redhat.com> In-Reply-To: <1331125520-13467-1-git-send-email-kraxel@redhat.com> References: <1331125520-13467-1-git-send-email-kraxel@redhat.com> Subject: [Qemu-devel] [PATCH 08/20] usb-ehci: Fix cerr tracking List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Hans de Goede , Gerd Hoffmann From: Hans de Goede cerr should only be decremented on errors which cause XactErr to be set, and when that happens the failing transaction should be retried until cerr reaches 0 and only then should USBSTS_ERRINT be set (and inactive cleared and USBSTS_INT set if requested). Since we don't have any hardware level errors (and in case of redirection the real hardware has already retried), re-trying makes no sense, so immediately set cerr to 0 on errors which set XactErr. Signed-off-by: Hans de Goede Signed-off-by: Gerd Hoffmann --- hw/usb-ehci.c | 19 ++++++------------- 1 files changed, 6 insertions(+), 13 deletions(-) diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c index 507e4a8..2685adc 100644 --- a/hw/usb-ehci.c +++ b/hw/usb-ehci.c @@ -1291,7 +1291,7 @@ static void ehci_async_complete_packet(USBPort *port, USBPacket *packet) static void ehci_execute_complete(EHCIQueue *q) { - int c_err, reload; + int reload; assert(q->async != EHCI_ASYNC_INFLIGHT); q->async = EHCI_ASYNC_NONE; @@ -1300,15 +1300,10 @@ static void ehci_execute_complete(EHCIQueue *q) q->qhaddr, q->qh.next, q->qtdaddr, q->usb_status); if (q->usb_status < 0) { -err: - /* TO-DO: put this is in a function that can be invoked below as well */ - c_err = get_field(q->qh.token, QTD_TOKEN_CERR); - c_err--; - set_field(&q->qh.token, c_err, QTD_TOKEN_CERR); - switch(q->usb_status) { case USB_RET_NODEV: q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_XACTERR); + set_field(&q->qh.token, 0, QTD_TOKEN_CERR); ehci_record_interrupt(q->ehci, USBSTS_ERRINT); break; case USB_RET_STALL: @@ -1336,15 +1331,13 @@ err: assert(0); break; } + } else if ((q->usb_status > q->tbytes) && (q->pid == USB_TOKEN_IN)) { + q->usb_status = USB_RET_BABBLE; + q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_BABBLE); + ehci_record_interrupt(q->ehci, USBSTS_ERRINT); } else { - // DPRINTF("Short packet condition\n"); // TODO check 4.12 for splits - if ((q->usb_status > q->tbytes) && (q->pid == USB_TOKEN_IN)) { - q->usb_status = USB_RET_BABBLE; - goto err; - } - if (q->tbytes && q->pid == USB_TOKEN_IN) { q->tbytes -= q->usb_status; } else { -- 1.7.1