njl d9ff05bfb1 Fix a panic in ata_generic_transaction(). The DMA pointer of the channel
was being unconditionally dereferenced but was NULL for PIO requests.
Check the request flags for a DMA transaction before dereferencing.

Reported by:	ceri
Tested by:	Radek Kozlowski <radek -at- raadradd.com>
2004-08-06 22:23:53 +00:00
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