* 2nd question on highmem in lldd
@ 2005-11-13 14:28 Oliver Neukum
2005-11-13 14:53 ` James Bottomley
0 siblings, 1 reply; 2+ messages in thread
From: Oliver Neukum @ 2005-11-13 14:28 UTC (permalink / raw)
To: linux-scsi
Hi,
how are failures of dma_map_sg supposed to be reported to higher layers?
Regards
Oliver
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 2nd question on highmem in lldd
2005-11-13 14:28 2nd question on highmem in lldd Oliver Neukum
@ 2005-11-13 14:53 ` James Bottomley
0 siblings, 0 replies; 2+ messages in thread
From: James Bottomley @ 2005-11-13 14:53 UTC (permalink / raw)
To: Oliver Neukum; +Cc: linux-scsi
On Sun, 2005-11-13 at 15:28 +0100, Oliver Neukum wrote:
> how are failures of dma_map_sg supposed to be reported to higher layers?
return DID_REQUEUE in the host byte of the command result is probably
closest to the behaviour you want: it will requeue until another command
returns for the host which (presumably) frees up some IOMMU resources.
James
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