From patchwork Wed Dec 7 07:23:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 9464109 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 424CF6022E for ; Wed, 7 Dec 2016 07:26:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 32D2828442 for ; Wed, 7 Dec 2016 07:26:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 26F2C284B4; Wed, 7 Dec 2016 07:26:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C6BE228442 for ; Wed, 7 Dec 2016 07:26:49 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cEWaT-0003Uy-Re; Wed, 07 Dec 2016 07:24:21 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cEWaQ-0003FG-CF; Wed, 07 Dec 2016 07:24:19 +0000 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 128477797; Wed, 07 Dec 2016 15:23:42 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Wed, 7 Dec 2016 15:23:41 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Felipe Balbi , Mathias Nyman , Matthias Brugger Subject: [PATCH] usb: mtu3: fix U3 port link issue Date: Wed, 7 Dec 2016 15:23:13 +0800 Message-ID: <1481095393-23198-1-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161206_232418_637680_72F87F56 X-CRM114-Status: GOOD ( 11.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alan Cooper , Sergei Shtylyov , Pawel Moll , Sascha Hauer , Oliver Neukum , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Alan Stern , Kumar Gala , Chunfeng Yun , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP the issue is introduced when @is_u3_ip is used in mtu3_device_enabe() before initialized in mtu3_mem_alloc(), so get global IP information at first before used by following functins. Signed-off-by: Chunfeng Yun --- drivers/usb/mtu3/mtu3_core.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index 520e55a..af3e531 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -481,21 +481,14 @@ static int mtu3_mem_alloc(struct mtu3 *mtu) void __iomem *mbase = mtu->mac_base; struct mtu3_ep *ep_array; int in_ep_num, out_ep_num; - u32 cap_epinfo, cap_dev; + u32 cap_epinfo; int ret; int i; - mtu->hw_version = mtu3_readl(mtu->ippc_base, U3D_SSUSB_HW_ID); - - cap_dev = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_DEV_CAP); - mtu->is_u3_ip = !!SSUSB_IP_DEV_U3_PORT_NUM(cap_dev); - cap_epinfo = mtu3_readl(mbase, U3D_CAP_EPINFO); in_ep_num = CAP_TX_EP_NUM(cap_epinfo); out_ep_num = CAP_RX_EP_NUM(cap_epinfo); - dev_info(mtu->dev, "IP version 0x%x(%s IP)\n", mtu->hw_version, - mtu->is_u3_ip ? "U3" : "U2"); dev_info(mtu->dev, "fifosz/epnum: Tx=%#x/%d, Rx=%#x/%d\n", mtu3_readl(mbase, U3D_CAP_EPNTXFFSZ), in_ep_num, mtu3_readl(mbase, U3D_CAP_EPNRXFFSZ), out_ep_num); @@ -730,8 +723,17 @@ irqreturn_t mtu3_irq(int irq, void *data) static int mtu3_hw_init(struct mtu3 *mtu) { + u32 cap_dev; int ret; + mtu->hw_version = mtu3_readl(mtu->ippc_base, U3D_SSUSB_HW_ID); + + cap_dev = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_DEV_CAP); + mtu->is_u3_ip = !!SSUSB_IP_DEV_U3_PORT_NUM(cap_dev); + + dev_info(mtu->dev, "IP version 0x%x(%s IP)\n", mtu->hw_version, + mtu->is_u3_ip ? "U3" : "U2"); + mtu3_device_reset(mtu); ret = mtu3_device_enable(mtu);