From patchwork Thu Apr 8 09:11:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: liulongfang X-Patchwork-Id: 12190329 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D273AC433ED for ; Thu, 8 Apr 2021 09:13:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99D2561139 for ; Thu, 8 Apr 2021 09:13:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230360AbhDHJOI (ORCPT ); Thu, 8 Apr 2021 05:14:08 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:16828 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229837AbhDHJOG (ORCPT ); Thu, 8 Apr 2021 05:14:06 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4FGFrG2tZwz93fd; Thu, 8 Apr 2021 17:11:42 +0800 (CST) Received: from huawei.com (10.67.165.24) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Thu, 8 Apr 2021 17:13:47 +0800 From: Longfang Liu To: , , , CC: , , , , Subject: [PATCH 2/2] USB:ehci:fix Kunpeng920 ehci hardware problem Date: Thu, 8 Apr 2021 17:11:13 +0800 Message-ID: <1617873073-37371-3-git-send-email-liulongfang@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1617873073-37371-1-git-send-email-liulongfang@huawei.com> References: <1617873073-37371-1-git-send-email-liulongfang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Kunpeng920's EHCI controller does not have SBRN register. Reading the SBRN register when the controller driver is initialized will get 0. When rebooting the EHCI driver, ehci_shutdown() will be called. if the sbrn flag is 0, ehci_shutdown() will return directly. The sbrn flag being 0 will cause the EHCI interrupt signal to not be turned off after reboot. this interrupt that is not closed will cause an exception to the device sharing the interrupt. Therefore, the EHCI controller of kunpeng920 needs to be added to the whitelist without SBRN register. Signed-off-by: Longfang Liu --- drivers/usb/host/ehci-pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 6a30afa..c392a26 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -53,6 +53,8 @@ static const struct usb_nosbrn_whitelist_entry { } usb_nosbrn_whitelist[] = { /* STMICRO ConneXT has no sbrn register */ {PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST}, + /* HUAWEI Kunpeng920 HiSilicon USB EHCI has no sbrn register */ + {PCI_VENDOR_ID_HUAWEI, 0xa239}, {} };