Re: [PATCH 1/1] Remove of old NCR53C9x/esp family of drivers

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From: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 4 Jan 2008 22:05:20 +1100 (EST)

> I have a partially written replacement for mac_esp. Unlike the other 
> NCR53C9x drivers it needs PIO or pseudo DMA depending on the machine -- so 
> it is not as straight-forward as jazz_esp. The new esp_scsi core assumes 
> DMA and doesn't support asynch transfers. But I'll try to get it finished 
> before 2.6.25 is released.

It does actually support such things.

You can hide it completely your ->irq_pending() handler.  Process any
pending pseudo DMA and return 0 until there is a pseudo DMA error or
the pseudo DMA is complete and the ESP is signalling an IRQ.
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