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 E913E26B0BE for ; Mon, 5 May 2025 16:20:12 +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=1746462013; cv=none; b=As9NSsE6TcE1c4ZVx+ILLnHpPidOvGSLbT/P+6PdOdOayTNCt5rVxPR9SqgnyNREUe/OtSifsdUKbMgAvXUnUQqzpQHVu+qCB61NJwIbBgTvrF9Yiz/oard+NReQIAdrk/8PNuxYydck0ZHH4E7NEJumw0h8oJx6eCZg4IcjWx8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746462013; c=relaxed/simple; bh=iVCa3RLv4Z2qotUJ5EE64Kgu+w6PCAEp0AiYUmxyDoA=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=BK/imeHE+jgCVRpaCk7phjkL/G7TAMKWkWo8+TlLhYGJIu8fob7Yx4pdYkFei6KP2goLdJjVZnvzZhommvA7ftHEJkU7b87Dk/ky66SV+YUj6dwno9P+HeT47Ht6ToY0uGKlQRmYaRr0LMrxj5s2sSJXwi3sHDhguvvxBAXssh8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XnPiqFG4; 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="XnPiqFG4" Received: by smtp.kernel.org (Postfix) with ESMTPS id 65172C4CEE4 for ; Mon, 5 May 2025 16:20:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746462012; bh=iVCa3RLv4Z2qotUJ5EE64Kgu+w6PCAEp0AiYUmxyDoA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=XnPiqFG4QbFQt5hFMgUMy1gYE39PQF4Zo2VYGruVblLwtuM4JRUU7yT9oA0WePGMO R8dmWj1DNqtvLqd0XgMgwH5iz68ArUhCCaBNIsAZmAAhkj03oepVLzlOdxHdyVTpX6 9NC6ve1AMkTxIVkDRFEdliKjIgYmaZyB2OArKlWVla52806wUZd9qUfIKKTzeib5wG kz2DFh0V/OlduCZYssS8n4X4a9arISpVqI79yyMUlCoTLH68DIZwrKirbMhrtwLoEM RYpPkDSGQDI7wwITbfVbP64rbJQgH1rhUaqCs060IQ3zku/tHqHVeyf7TBfaFxyocK yW4OLq/suH6NQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 5818EC41613; Mon, 5 May 2025 16:20:12 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 220090] usb: teach the usb subsystem about non-coherent dma Date: Mon, 05 May 2025 16:20:12 +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: gregkh@linuxfoundation.org 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: 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=3D220090 --- Comment #1 from gregkh@linuxfoundation.org --- On Mon, May 05, 2025 at 03:45:51PM +0000, bugzilla-daemon@kernel.org wrote: > This is based on my findings attempting to bring the usb EHCI driver > "ehci-hlwd" in wii-linux (https://wii-linux.org/) to mainline linux (6.14= ). Great, please submit patches for this, BUT it looks like this: > Commit 461db2bdbf3c978e76dd10a04a63fa06bb29114f changed the conditions ne= eded > to trigger a sync for non-coherent dma memory. Might be the real root of the problems. Please work with the dma developers to see if that's the cause, as all other platforms seem to work just fine with the ehci drivers that we know of, so perhaps this is just a dma subsystem setup issue somewhere for your platform? thanks, greg k-h --=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.=