From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 AD70B3AE718; Thu, 1 Oct 2026 22:40:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790894444; cv=none; b=IzCI+3XFnVyg/0uyhhW43AOEj5rTyQX//3Umgu4t1P2PDjnLn2AlofkJRKlJ9jX2C205WnYdP36YyPrWDxcUKrSfon4jpH8mze/vkPdk/YLRNn+AWmRD+dfqVntRtTl0nUHYMfcK+GXTxnCEAEkvfebn4jSjA/jNPdL/wApAWpU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790894444; c=relaxed/simple; bh=ZN8RoTZg6K01nxxeJFAZR4JgG9STIYMvAUqfTbJwn8s=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=UqfeUASsDC/WkUvw2g/er4GkirJG2LHfEC+7yRfSbt9YSSuJwOY27kWGpVvADAxCvqOljIVJ87SQvR8Mkct7BSMBBULvlb0tJpZtRVSz3pjZj/dnN084I+PXDxWSzVn2+1dOSD5CGiRebq6QifVF8b7At6iwVYkmyVdSMHWpGZk= 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=Np16BhZh; arc=none smtp.client-ip=198.175.65.15 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="Np16BhZh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790894442; x=1822430442; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=ZN8RoTZg6K01nxxeJFAZR4JgG9STIYMvAUqfTbJwn8s=; b=Np16BhZhS83a9XWPvRctkirsskTeuyQYcxhDtn9zC41DGZMqeJDQbKYT T4fH8w/RzcU+TL7Lv9sGD3mCzjoRSDyN0zNQIyFx5JAvviBGA/C70dJjM 1q7t5JYWUcvW8LYRHFy8LHyVwyZGCxMPntgMGfRnt/F2s3OIg6+ACsURO 3v2xQRHwCLRVfzm6g9+ncbivCV+hOfm1A0Rk+jMBM54ERH+CWlAX/dkux ykamoPeLA4kcPr6xz3bMHnhSKPmOss3IkkXsSsNNJEhmSdnt7s+UyMYAo K7UkNoAwxpJI4TDxq6kdR/ET9Su8jAjjU/EmFQZ/6EFn2XZACHAr8+3Qj A==; X-CSE-ConnectionGUID: d8RrBAVSQrC/OU7bJ3QC1w== X-CSE-MsgGUID: mdYo8rowRhKcgfF3ahD1tw== X-IronPort-AV: E=McAfee;i="6800,10657,11922"; a="94377769" X-IronPort-AV: E=Sophos;i="6.27,135,1787036400"; d="scan'208";a="94377769" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2026 15:40:42 -0700 X-CSE-ConnectionGUID: kozJbeGQQH+NeUjkJc8c2A== X-CSE-MsgGUID: h0sh4h/4T+q+qW5t0OJ2AA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,135,1787036400"; d="scan'208";a="273934360" Received: from ettammin-mobl2.ger.corp.intel.com (HELO [10.245.244.120]) ([10.245.244.120]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2026 15:40:39 -0700 Message-ID: Date: Fri, 2 Oct 2026 01:40:37 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] xhci: Reset controller on xhci shutdown To: wenxiong@linux.ibm.com, mathias.nyman@intel.com, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, wenxiong@us.ibm.com, Brian King , Samuel Mendoza-Jonas , Joel Stanley References: <20261001222527.11742-1-wenxiong@linux.ibm.com> Content-Language: en-US From: Mathias Nyman In-Reply-To: <20261001222527.11742-1-wenxiong@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi On 10/2/26 01:25, wenxiong@linux.ibm.com wrote: > From: Wen Xiong > > Fixes kexec boot. Without a hard reset, some USB chips will fail to > initialize in a kexec booted kernel. > > Signed-off-by: Brian King > Signed-off-by: Samuel Mendoza-Jonas > Signed-off-by: Joel Stanley > Signed-off-by: Wen Xiong > --- > drivers/usb/host/xhci.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c > index a9e47e178c28..364bd61a4bd7 100644 > --- a/drivers/usb/host/xhci.c > +++ b/drivers/usb/host/xhci.c > @@ -781,6 +781,9 @@ void xhci_shutdown(struct usb_hcd *hcd) > xhci_dbg_trace(xhci, trace_xhci_dbg_init, > "xhci_shutdown completed - status = %x", > readl(&xhci->op_regs->status)); > + > + /* TI XHCI controllers do not come back after kexec without this hack */ > + pci_reset_function_locked(to_pci_dev(hcd->self.sysdev)); > } > EXPORT_SYMBOL_GPL(xhci_shutdown); > Should be added to xhci-pci.c: xhci_pci_shutdown() instead. Probably also limited to that specific TI xHC controller Thanks Mathias