From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B00674477E1 for ; Fri, 7 Aug 2026 06:21:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786083662; cv=none; b=m3A+3nL1qW6AwbMcXFDUWcKD7JOLcl6fsp/0xLZA2TmLidDtkqME0w/MwYUSxwuzBxNx4HkhyXp6o+ZlifoMAU+ymexJLTxCnW6X8NqMMpu+saAxhJpOpuy4YxbdbVc7m2J27v0R4Nz5SSjK1fmdHVbod4x6Ppew9imB901zgaE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786083662; c=relaxed/simple; bh=POzmRgE2KT2VgZ+BQI6wtH1rUfIWQgo5Rq1Q2qH5xaw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qe6QaiNBgxyomwtJmbL9qrkADGPLxLxO/pd6zSbDzfHZ7D1Mq2cJO4Wa8XIEtFWQusfQBGcuwciF+6iyu53Hv7AcUXvDSwyraEiRTW+xcPad+GYYHhHLI4a1/RcGgxn1XxG3LTaHBtNOriuzVzop3FYMee718rRKIa5rNX/4Kzs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=QyxzJa+S; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="QyxzJa+S" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1786083661; x=1817619661; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=POzmRgE2KT2VgZ+BQI6wtH1rUfIWQgo5Rq1Q2qH5xaw=; b=QyxzJa+SG57xrm0XwZQ0v9lix/SMOEhBGqlnhWrtB5MpuwqREsimCHzn CrnNTTpQR29Tkkr6gjIdedhFLzrTL60201K7aoaX7fgLA22QYdR9tnLwt R3RaNQJSJEWn31FLE5c8MzHGleXS71wQQjGj1W2fI2Co2j9N/rJhlFEc4 u5tB8rbmC11jkStAT1ToVOGwLAaDVxOtutZNry54J01bT9i3LkRi+Yzwt LArmK/QQtnheQRJcLBozhhKpSrBjBrxRggY0lLbREQFNSrdxr6HpWEpRU 4+ldm3MNXtm4nX/aZZMSK50xzgwQEchPQ9CYUCHruz/PT1nhw36PUnL22 A==; X-CSE-ConnectionGUID: tH2bACiSTUSAS/YJ0IGpFg== X-CSE-MsgGUID: ne+uT5KkTy+kYJcMxmEbcw== X-IronPort-AV: E=McAfee;i="6800,10657,11867"; a="90503872" X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="90503872" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 23:21:00 -0700 X-CSE-ConnectionGUID: z5tG2JF4SKOhzIKeNWHXFg== X-CSE-MsgGUID: /MzvzJpbTCmE4Ci0p2s6OQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="258008352" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa006.fm.intel.com with ESMTP; 06 Aug 2026 23:16:29 -0700 Received: by black.igk.intel.com (Postfix, from userid 1001) id 2FB7299; Fri, 07 Aug 2026 08:16:28 +0200 (CEST) Date: Fri, 7 Aug 2026 08:16:28 +0200 From: Mika Westerberg To: Basavaraj Natikar Cc: andreas.noever@gmail.com, westeri@kernel.org, YehezkelShB@gmail.com, linux-usb@vger.kernel.org, Mario.Limonciello@amd.com, Sanath S Subject: Re: [PATCH -next v3] thunderbolt: Add quirk to reset host interface on DMA path teardown for AMD USB4 routers Message-ID: <20260807061628.GK235112@black.igk.intel.com> References: <20260806125929.1238914-1-Basavaraj.Natikar@amd.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260806125929.1238914-1-Basavaraj.Natikar@amd.com> Hi, On Thu, Aug 06, 2026 at 06:29:29PM +0530, Basavaraj Natikar wrote: > Some AMD USB4 host routers have a bug in the Host Interface where > DMA path setup and teardown cycles may cause the Tx ring to hang. > > Fix this by issuing a Host Interface Reset on every DMA path teardown > for affected routers. The Host Interface Reset brings the registers in > the memory BAR to their default state and clears the End-to-End Flow > Control state, preventing the hang condition. > > Co-developed-by: Sanath S > Signed-off-by: Sanath S > Signed-off-by: Basavaraj Natikar I did few minor cosmetic tweaks and applied to thunderbolt.git/next, thanks!