From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ns.amrita.ac.in ([203.197.150.194]:20879 "EHLO bhadra.amrita.ac.in") by vger.kernel.org with ESMTP id S964974AbWAXFFi (ORCPT ); Tue, 24 Jan 2006 00:05:38 -0500 Message-ID: <43D5B80F.3050705@arl.amrita.edu> Date: Tue, 24 Jan 2006 10:45:59 +0530 From: Harish K Harshan MIME-Version: 1.0 Subject: DMA Transfer Problem Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org To: linux-arch@vger.kernel.org List-ID: Hello, Im having problems with DMA transfer on Linux, for an ADC card. The card is AxiomTek AX5621H (ISA), and can use DMA channels 1 and 3. I tried both the channels, but the DMA transfers are irregular (i.e.) at different speeds (which of course is not acceptable, since that application is time critical). The device driver (which I wrote) seems to work fine for all the other systems I tried it on. But this problem occurs only on one particular model of computer (Chino-Laxsons Pentium-4 boards). I tried another system with the same configuration, but the same resulted. After some time of execution, I get the kernel panic screen, which says the CPU context is corrupt. Please help me with this problem, as I need to get this driver working somehow on the P4 systems. I tried the Redhat-9 kernel (2.4.20-8) and the debian kernel too (2.2.20).... gave the same results. Thanks in advance, Harish.