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Date:	Sun, 25 May 2008 08:43:47 +0300
From:	Marin Mitov <>
Subject: pci_set_consistent_dma_mask() question

Hi all,

In the file: Documentation/DMA-mapping.txt is written:

pci_set_consistent_dma_mask() will always be able to set the same or a
smaller mask as pci_set_dma_mask(). However for the rare case that a
device driver only uses consistent allocations, one would have to
check the return value from pci_set_consistent_dma_mask().

grep-ing drivers/net/* shows that in many drivers 
the return value of pci_set_consistent_dma_mask() is checked
in the path where pci_set_dma_mask() was already successfull.
Sure, this is during driver's initiallysation, so it is not time critical.

My question: Is it worth to remove the unnecessary checks?
I could prepare patches if you find it worthfull.

Best regards.

Marin Mitov
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