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 55FE07495 for ; Tue, 14 Nov 2023 03:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="r/cygs+5" Received: by smtp.kernel.org (Postfix) with ESMTPS id CEE05C433CA for ; Tue, 14 Nov 2023 03:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699932304; bh=3+BD5apSez+jrPDh1aMgbH/meLVj5LHkfPeiWwt1HOs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=r/cygs+5d8TyNiltjTzmR8s8MYDaM/ZDUKYwbwkpv9f8y1fwpfYrGN60EkZs9xYfV +K8xkmatSypuistnIUfjcgSnshSlT0ahCEVuFlImJIGA46drjtkf5moNHHJXUyee8m DSbsl68U28jTth8xrnQ6VV4U9ekXWwHHaC3jn3794Ontmwn5omIffhrmhWekn/C4Yd Ru1MbTbLGZOJwZJllpcK3h785KuzWazAlm+dex/ZzHc8hAe44cazH3v+6eILLF+a/s OddGRDVE2tRkUBho9SMjwDotfE7bLKNXoLopBBUzFU7oUWs2876f+NaAYlN9rwBbJk T2LlC2LFVERgQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id BAC74C53BD5; Tue, 14 Nov 2023 03:25:04 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported Date: Tue, 14 Nov 2023 03:25:04 +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: stern@rowland.harvard.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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=3D215740 --- Comment #11 from Alan Stern (stern@rowland.harvard.edu) --- I don't think it has anything to do with the init3: section. The stack tra= ce shows that the problem stems from hub_ext_port_status(), probably called by port_event() within hub_event(). And the place where hub_ext_port_status() calls usb_control_msg() indirectly is protected by a mutex! The I/O buffer being mapped multiple times is hub->status->port, and it doe= sn't get used anywhere else in the hub driver AFAICS. (There is a comment about= the phy driver also using that buffer; I don't know what it refers to.) [It would be easier to track this down if the DMA subsystem would cause the= se erroneous mappings to fail instead of pretending that they have succeeded.= =20 Grumble...] I'm stumped. I'll try to find time to reproduce it on my own system. Prob= ably would have noticed it before now if I had tried connecting an external hub recently, but that just hasn't come up. --=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.=