From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Tissoires Subject: [PATCH 0/4] HID: fix few non-DMA capable HID transfers Date: Mon, 21 Nov 2016 11:48:38 +0100 Message-ID: <1479725322-30863-1-git-send-email-benjamin.tissoires@redhat.com> Return-path: Received: from mx1.redhat.com ([209.132.183.28]:26771 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753599AbcKUKsq (ORCPT ); Mon, 21 Nov 2016 05:48:46 -0500 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Jiri Kosina Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Hi Jiri, While playing a little bit with the CP2112 (for hid-rmi I must confess), I realized that kernel v4.9 now enforces DMA capable buffers when calling hid_hw_raw_request(). Kernel v4.8 works fine (but gives a stacktrace the first time), but v4.9 doesn't. So I gave a check of all the other drivers in the HID tree, and it looks like only 4 drivers are not properly allocating their buffers. I'd say this is v4.9 material but I was not able to test magicmouse and lg. If this doesn't qualifies for 4.9-rc7, I think we should add the stable@ stamp, given that the chance this will break hid-rmi is huge (cp2112 is not so much an issue, given it's a devel board). Cheers, Benjamin Benjamin Tissoires (4): HID: cp2112: make transfer buffers DMA capable HID: lg: make transfer buffers DMA capable HID: magicmouse: make transfer buffers DMA capable HID: rmi: make transfer buffers DMA capable drivers/hid/hid-cp2112.c | 115 +++++++++++++++++++++++++++++-------------- drivers/hid/hid-lg.c | 12 +++-- drivers/hid/hid-magicmouse.c | 12 ++++- drivers/hid/hid-rmi.c | 10 +++- 4 files changed, 106 insertions(+), 43 deletions(-) -- 2.7.4