From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mbox1.netikka.net ([213.250.81.202]:44413 "EHLO mbox1.netikka.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754097Ab0BNJxc (ORCPT ); Sun, 14 Feb 2010 04:53:32 -0500 Message-ID: <4B77C819.9050602@mandriva.org> Date: Sun, 14 Feb 2010 11:53:29 +0200 From: Thomas Backlund MIME-Version: 1.0 CC: linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: linux-2..6.33-rc7 and b43 Content-Type: text/plain; charset=ISO-8859-1; format=flowed To: unlisted-recipients:; (no To-header on input) Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi, (please cc me on replies) We have a user that tried out b43, but got this in the logs: --- cut --- 65858:Feb 9 22:05:16 elmo kernel: b43-phy2 ERROR: This device does not support DMA on your system. Please use PIO instead. 65859:Feb 9 22:05:16 elmo kernel: b43-phy2 ERROR: CONFIG_B43_FORCE_PIO must be set in your kernel configuration. 65860:Feb 9 22:05:16 elmo kernel: b43-phy2 debug: Adding Interface type 2 65861:Feb 9 22:05:16 elmo kernel: b43-phy2 ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 65862:Feb 9 22:05:16 elmo kernel: b43-phy2 ERROR: This device does not support DMA on your system. Please use PIO instead. 65863:Feb 9 22:05:16 elmo kernel: b43-phy2 ERROR: CONFIG_B43_FORCE_PIO must be set in your kernel configuration. --- cut --- But reading the Kconfig help, it states: --- cut --- config B43_FORCE_PIO bool "Force usage of PIO instead of DMA" depends on B43 && B43_DEBUG ---help--- This will disable DMA and always enable PIO instead. Say N! This is only for debugging the PIO engine code. You do _NOT_ want to enable this. --- cut --- So, wich one is it ? Do I belive the dmesg output, or the Kconfig ? Note, the b43 works for the user if he enable the CONFIG_B43_FORCE_PIO. But I'm thinking of this problem from a distro point of view. Will it break for others if I enable it ? -- Thomas