From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 099DEC433E0 for ; Sun, 3 Jan 2021 18:57:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD1DE20770 for ; Sun, 3 Jan 2021 18:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726602AbhACS5X convert rfc822-to-8bit (ORCPT ); Sun, 3 Jan 2021 13:57:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:46950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725840AbhACS5W (ORCPT ); Sun, 3 Jan 2021 13:57:22 -0500 Received: by mail.kernel.org (Postfix) with ESMTPS id 52AD620770 for ; Sun, 3 Jan 2021 18:56:42 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 210777] pwc driver doesn't work anymore Date: Sun, 03 Jan 2021 18:56:42 +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: harald@a-little-linux-box.at 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: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=210777 --- Comment #3 from Harald Jenny (harald@a-little-linux-box.at) --- The problem is presumably related to the changes in the DMA mapping in kernel 5.10 (commit 5a32c3413d3340f90c82c84b375ad4b335a59f28) as pwc uses noncoherent DMA buffers. Reverting commit 1161db6776bd1c35257e1e362e91bcb1b3fe4347 (which fixes performance issues) make pwc work again but opens up the orginial problem of transfer rates on armv7l. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.