DMA_NONE data_direction in scsi

From: Guennadi Liakhovetski
Date: Mon Nov 17 2003 - 14:27:44 EST


Hello

While trying to fix tmscsim for 2.6, I've arrived at the Oops below, which
is caused by the BUG_ON() in dma_map_page(). In the backtrace below,
data_direction is set to DMA_BIDIRECTIONAL in sd_revalidate_disk(),

sreq->sr_data_direction = DMA_BIDIRECTIONAL;

, but already in sd_spinup_disk() it is reset to DMA_NONE:

SRpnt->sr_data_direction = DMA_NONE;

So, the question is: is this the correct behaviour, and, if so - how is
the driver supposed to map this request - which direction to pass to
dma_map_*?

Thanks
Guennadi
---
Guennadi Liakhovetski


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