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From: Harish K Harshan <harish@arl.amrita.edu>
To: linux-arch@vger.kernel.org
Subject: DMA Transfer Problem
Date: Tue, 24 Jan 2006 10:45:59 +0530	[thread overview]
Message-ID: <43D5B80F.3050705@arl.amrita.edu> (raw)

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.

             reply	other threads:[~2006-01-24  5:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-24  5:15 Harish K Harshan [this message]
2006-01-24 17:04 ` DMA Transfer Problem Bjorn Helgaas

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