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 04C3825D538 for ; Mon, 5 May 2025 16:20:11 +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=1746462012; cv=none; b=QKkiaRcjI576+LiW+npnVk3I6lOdm3rfb57X/IJLlcwPiygpdQ6IQI/VRpKrM+UWQoP6D4INeuU+HEIafbMnAZA5NNficrl1MzGeYwuDNDEH1mDYrMKnh4lYH63JUQ2SYDsloNdXdKv2imvynmcdI26IjYu9amvNxxanWiBsvxA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746462012; c=relaxed/simple; bh=bP+2H5hUKtW4lSFFN95ZZ7Nh/CqvXyzQT0djhbQ82JE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=XaiOtfISwNr9vWEB9NnpTODtEllX1D6X44BSZ5Qpsw6RSmBnKlob71ublDH0khUGxjkJTL4cZaLU3GAoiXwpJ/7vBrA8mj/HC7zB5SXlAHEYXx5ebxq4xLiOupEp2Bh16lt1E4PN47xJIeg/TG2RuaMCvxmj3jYR7NA04TvmTWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KkXWvOkg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="KkXWvOkg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0C632C4CEEE; Mon, 5 May 2025 16:20:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1746462011; bh=bP+2H5hUKtW4lSFFN95ZZ7Nh/CqvXyzQT0djhbQ82JE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=KkXWvOkgYMLWqVb2xs0MIoW+QmvJIYP8afuEo4/BH9J8zkS0WzznqKpKA0HdVDatP sZy42huLPjvkBkjCXQJPGymMbnM3iMPQMtB/eaE18HRkuodE+wKKDGUb3J5brO9zs7 wWow0c/+GxQEpJaPcsPpXZJl7MHH8hAoArAXA1gs= Date: Mon, 5 May 2025 18:20:08 +0200 From: Greg KH To: bugzilla-daemon@kernel.org Cc: linux-usb@vger.kernel.org Subject: Re: [Bug 220090] New: usb: teach the usb subsystem about non-coherent dma Message-ID: <2025050507-tipper-quartered-5bf4@gregkh> References: 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-Disposition: inline In-Reply-To: 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 needed > 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