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[83.28.47.133]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a027725c6asm71100105e9.8.2026.10.02.01.29.35 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Fri, 02 Oct 2026 01:29:36 -0700 (PDT) Date: Fri, 2 Oct 2026 10:29:31 +0200 From: Michal Pecio To: wenxiong@linux.ibm.com Cc: mathias.nyman@intel.com, gregkh@linuxfoundation.org, 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 Subject: Re: [PATCH] xhci: Reset controller on xhci shutdown Message-ID: <20261002102931.3cb06009.michal.pecio@gmail.com> In-Reply-To: <20261001222527.11742-1-wenxiong@linux.ibm.com> References: <20261001222527.11742-1-wenxiong@linux.ibm.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=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 1 Oct 2026 18:25:27 -0400, 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. What exactly happens after kexec? Why a PCI reset in particular? Are we sure it's not a bug elsewhere? Regards, Michal