From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932813AbdAJNrB (ORCPT ); Tue, 10 Jan 2017 08:47:01 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:33036 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1033689AbdAJNq4 (ORCPT ); Tue, 10 Jan 2017 08:46:56 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Felipe Balbi Subject: [PATCH 4.9 034/206] usb: dwc3: core: avoid Overflow events Date: Tue, 10 Jan 2017 14:35:17 +0100 Message-Id: <20170110131504.201117596@linuxfoundation.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170110131502.767555407@linuxfoundation.org> References: <20170110131502.767555407@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi commit e71d363d9c611c99fb78f53bfee99616e7fe352c upstream. Now that we're handling so many transfers at a time and for some dwc3 revisions LPM events *must* be enabled, we can fall into a situation where too many events fire and we start receiving Overflow events. Let's do what XHCI does and allocate a full page for the Event Ring, this will avoid any future issues. Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -43,9 +43,7 @@ #define DWC3_XHCI_RESOURCES_NUM 2 #define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */ -#define DWC3_EVENT_SIZE 4 /* bytes */ -#define DWC3_EVENT_MAX_NUM 64 /* 2 events/endpoint */ -#define DWC3_EVENT_BUFFERS_SIZE (DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM) +#define DWC3_EVENT_BUFFERS_SIZE 4096 #define DWC3_EVENT_TYPE_MASK 0xfe #define DWC3_EVENT_TYPE_DEV 0