Re: 2.4.21-pre4: PDC ide driver problems with shared interrupts

From: Benjamin Herrenschmidt (
Date: Fri Feb 14 2003 - 10:41:50 EST

On Fri, 2003-02-14 at 15:41, Edward King wrote:

> Just wanted to jump in here -- I'm setting up a box using two PDC20268
> controllers for a 4 drive software raid. The system locks on heavy
> disk activity only if dma is active.
> I was watching this thread and put in the patch to remove the
> "drive->waiting_for_dma++;" line. I still get lockups and the message
> on the console is:
> hdg: dma_timer_expiry: dma status == 0x21
> hde: dma_timer_expiry: dma status == 0x21
> hdg: timeout waiting for DMA
> PDC202XX: Secondary channel reset
> hdg: timeout waiting for DMA
> hdg: (__ide_dma_test_irq) called while not waiting
> hdg: status error: status = 0x58 { DriveReady SeekComplete DataRequest

The above error is a different problem. Before trying to track it
down, I'd strongly suggest that you first check if it still happens
with the latest 2.4.21-pre4-acX from


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