From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B921938A72A for ; Tue, 24 Feb 2026 12:03:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771934581; cv=none; b=C91qVe6YWHjWfZc0crjlJUj4us8dM+x+05KulFj88DWL6UyW+oAaUAKjCE6DYpPJuIK3BS7M17sCB26Y/ZPe5xYvs7jt2/U+Sg/EsfzEDSZJUAdxnGOh0IKqh431My5MOVnWwSSkDMw0LKmG3vgOifSwBR0YvXl9a+fLl6RKb/4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771934581; c=relaxed/simple; bh=uirNYUMPwRROHJM8+ztNE7YuJonK5UwiLd5dUZUU/1c=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=fNHO7IPPI23yGU9ac1ARL8R4IuYtGKkvC9cbgqkZfra/vhqXXWfxSAk7fvVthmaUFiEVQQWRwkRRWiJAgCJssumYFVa0cAwPPbmNGe976sFIRoU+BBUzdzcZBdht0CPSlU1eZmcGfpql4p3JRwkDI+/euTzjTD72eW19I72xMxA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=u7KJkXtr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="u7KJkXtr" Received: by smtp.kernel.org (Postfix) with ESMTPS id 1C280C19422 for ; Tue, 24 Feb 2026 12:03:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771934581; bh=uirNYUMPwRROHJM8+ztNE7YuJonK5UwiLd5dUZUU/1c=; h=From:To:Subject:Date:In-Reply-To:References:From; b=u7KJkXtrwoXHM6iPZ5+qEGh6rGcSgPzO2KZndwlClPbikhPJS/ZngjKhtR6AA9sPN 0L+IfUsc6MccTggfw9VkuqhOc5SLRw35+5rugNFTwyaM8Fxv7YbsNrF4L+k8NhEoeu fXL+7q/1EzGmUmUgnwtZJ9y5imZY4C1F/kyloSqUA87CaIX2sy7wR4el7Qpxvk8ery 6Hq6y0aXvKHdnRxbk0UOtT3kxFwKPaXvhfGlx3AvrB/d+C9q1DGOe/nXfQl2RiRps3 WOoomIJPFNvShRY5TySWJtoR/bM+FC63pjF7v0WpPvzYR+akCXsehiWGPCHMGmWeTy BJtEDSOTONeAA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 0E3B1C41614; Tue, 24 Feb 2026 12:03:01 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms Date: Tue, 24 Feb 2026 12:03:00 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mathias.nyman@linux.intel.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221103 Mathias Nyman (mathias.nyman@linux.intel.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mathias.nyman@linux.intel.c | |om --- Comment #22 from Mathias Nyman (mathias.nyman@linux.intel.com) --- As Michal stated above this is due to reading 0xffffffff from the xHC mmio USBSTS 'status' register in xhci_resume(). This would happen if a PCI xHC controller isn't properly powered up yet. I'll add a hack that sleeps for a little while and then retries. Lets see i= f it helps. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=