From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=54.92.39.34 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793153574; b=xzPCeu0F/vN4HeIhkOxCNaLanswelf47sJGjFBnU5p/8LZuGlNxfyNDRFOSCEeRsEmi+ h502cf1nDqPHIgMBvbJUBVFVs+ZsPwkI+4YEljPIvDvGrHwvyHqv+bfxIYujRX4BaBbfS U+U3s3F1Hih9Q/XJpLxxgQJcFx08Y8+u4DS4iIB5q3xnOJIbQPu2MpimMRzpNCk/dh7Mv wXA8nw5ti8HaEHPZo5xFj44UHnJWn2NVZFPHadQi7PSS7gFxMJY29rE6B3JlIIBfCSE0e ylbqemwQkqVd5/9OKn7nw6CcOmYa20N8mz35EhjfZhoRIvFeGP4t+d2zBWnAYULjI9Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793153574; h=DMARC-Filter:DKIM-Signature:X-QQ-mid:X-QQ-Originating-IP:Received: X-QQ-SSF:X-QQ-GoodBg:X-BIZMAIL-ID:EX-QQ-RecipientCnt:From:To:Cc: Subject:Date:Message-Id:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-QQ-SENDSIZE:Feedback-ID:X-QQ-XMAILINFO: X-QQ-XMRINFO:X-QQ-RECHKSPAM; bh=wU4Ia8fV3iTsBzSrNt4mi0K7wxY3KqFiaUETYiyiMPw=; 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dmarc=pass (p=none dis=none) header.from=ugreen.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ugreen.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=ugreen.com header.i=@ugreen.com header.a=rsa-sha256 header.s=pkvm2402 header.b=UoLhDi+L DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ugreen.com; s=pkvm2402; t=1793153550; bh=wU4Ia8fV3iTsBzSrNt4mi0K7wxY3KqFiaUETYiyiMPw=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=UoLhDi+LkuxHktmuDnsAuADWO0LFdoRzQniOvb9VYBDOyRhl/pZfJ+tREIQKnMOUo LvEtfFW+Ft3JgEUST09an6JsOEx7ELYKOQHjd3isKWTkbOaSIT8zXuNQnvHkktAx0K 7G1buVKxNt8Wjlmk8pI8WImG06wK1mQGL72IlKKU= X-QQ-mid: zesmtpsz2t1793153546t308e49b2 X-QQ-Originating-IP: Tv1/oI+L0nH1S7ph0/goJW2q6W48rguru+lqloQGJhs= Received: from localhost.localdomain ( [14.153.244.130]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 28 Oct 2026 10:12:22 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 2123676553908216664 EX-QQ-RecipientCnt: 5 From: Haowen Bai To: gregkh@linuxfoundation.org Cc: mathias.nyman@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Haowen Bai Subject: Re: [PATCH v2] usb: pci-quirks: abort xHCI handoff if MMIO is inaccessible Date: Wed, 28 Oct 2026 10:12:26 +0800 Message-Id: <20261028021226.1314753-1-calvin.bai@ugreen.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <2026102749-spender-coke-2fc1@gregkh> References: <2026102749-spender-coke-2fc1@gregkh> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpsz:ugreen.com:qybglogicsvrgz:qybglogicsvrgz3a-1 X-QQ-XMAILINFO: NiWQQk7XjMbnOrX8TaOxcbBrEFrfw493m6pV3EDynwJwyFG8or2BlSmM rT2wEv99QyYpAt/yy4WzUHsoOAvFD07SFOct4SRzTsSwvsVb8gpVlC5LH04eJxtXZtuKcua ym6lFuagPQRMbc76bd0E0ESdRgAP5W4G9jqRlcOKZDPMgF8iDJTWxDjh7KEMkGXefBslGlV cdVgv4XzFcyLXtcaQ8CkUSlJYSbKt58ayXEq/BmKV9ErhXoHD1WSUiPrj6Z2VYY1JbzdIU1 i+mkv3+uAPbitWZJY3Gzk6dV4VTx+npsTNFtqC1d2Qh6752Oi2iiCG5ijn3MDbLBgvs4oSk M+AbO9ZA0oPhRd2mmT1h94PAIpSYm+Iec89V/50DjFO1h/vc2wzOO4nVuOX75IIN3cNYsQy 4a36nj8TxQvdtru83GW9Y1muFyMRN24h3Kg0ms2ovPoPjpujTDcxIEmUMBZ5zDP+A0xH8lE 7VCGPNs8uRptS0uqUT71wKVF9kzFdIexi1y3UJMvmLrz4iOX+UdGqDDDEDGW9fHY25XDnB3 3bzlAGOdnN4o7zKQ5PSJ4RtUBtTW4BEZvGfpRs4nlAyZDXxzpcQ7d8/8MSlU0hcjbu7Ofll /lHVj/9KKvNtLalYNvUbLbU3jxSAmEWKGVY4j7NbdBnqSW1XHrO+rx603HwPVywAE/jG/LY kTJdaPZ8bjcttIVeBxMgcVpUi+a89WKMczuiNw6hjKdD3+JhQ2gsybmXrwiFGcwqSVIUBCn whmk/zrFn89fKQgQez0xd1J2zjjSzV/NhmLcGf54LblM0HO/u13OJdztTgICktTd4PCXdRn /0/2H8cf/bGR7i2ljSNtSM8g93roxjZnZvL0ppjRrf/twEw4Mft/ctCyrWbtsCqht78FBkB jvJtmsfQYTz37alXItW7P1SNx7bno1MKNIrCTNVvR8J8a25jBAfB4Gox6bInyrrtEHoyeDo m3WD9JDjYo0bkOOzUj5liM6HoqH/JbGvqYa4dD1VOFAm5d1BVs38TTAXh X-QQ-XMRINFO: NS+P29fieYNwqS3WCnRCOn9D1NpZuCnCRA== X-QQ-RECHKSPAM: 0 Hi Greg, > Sorry, but I see no context here at all :( Sorry for the missing context. The v2 patch is here: https://patchew.org/linux/02C44DCEA968C75D%2B20260914022743.30852-1-calvin.bai%40ugreen.com/ It makes the xHCI early handoff abort when MMIO reads return all ones, avoiding prolonged polling and soft lockups during PCI hotplug. The v2 incorporates Lukas's suggestion to use PCI_POSSIBLE_ERROR() and carries Mathias's Acked-by. Could you please take this through your USB tree, or should it go through Mathias's xHCI tree? I can resend the full patch if needed. Thanks, Haowen