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authorFinn Thain <fthain@telegraphics.com.au>2009-12-05 12:30:42 +1100
committerJames Bottomley <James.Bottomley@suse.de>2010-01-18 10:48:10 -0600
commit02507a80b35edd720480540d917e9f92cc371009 (patch)
tree0da90f4cc680093926073f34fb9ddcb84f4a1aea /drivers/message
parentf2818663c82b7297ff4aa38cbddb870dc02f7104 (diff)
[SCSI] mac_esp: fix PIO mode, take 2
The mac_esp PIO algorithm no longer works in 2.6.31 and crashes my Centris 660av. So here's a better one. Also, force async with esp_set_offset() rather than esp_slave_configure(). One of the SCSI drives I tested still doesn't like the PIO mode and fails with "esp: esp0: Reconnect IRQ2 timeout" (the same drive works fine in PDMA mode). This failure happens when esp_reconnect_with_tag() tries to read in two tag bytes but the chip only provides one (0x20). I don't know what causes this. I decided not to waste any more time trying to fix it because the best solution is to rip out the PIO mode altogether and use the DMA engine. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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