From patchwork Thu Apr 8 13:49:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: liulongfang X-Patchwork-Id: 417931 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 4BF32C43461 for ; Thu, 8 Apr 2021 13:52:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2917761151 for ; Thu, 8 Apr 2021 13:52:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231699AbhDHNwQ (ORCPT ); Thu, 8 Apr 2021 09:52:16 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:15630 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231617AbhDHNwP (ORCPT ); Thu, 8 Apr 2021 09:52:15 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FGN0T5dhfzpWdv; Thu, 8 Apr 2021 21:49:13 +0800 (CST) Received: from huawei.com (10.67.165.24) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Thu, 8 Apr 2021 21:51:54 +0800 From: Longfang Liu To: , , , CC: , , , , Subject: [PATCH v2 2/2] USB:ehci:fix Kunpeng920 ehci hardware problem Date: Thu, 8 Apr 2021 21:49:20 +0800 Message-ID: <1617889760-17733-3-git-send-email-liulongfang@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1617889760-17733-1-git-send-email-liulongfang@huawei.com> References: <1617889760-17733-1-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 534e906..7bd075c 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}, /* End of list */ {NULL, NULL} };