[SCSI] aic94xx: Don't call pci_map_sg for already-mapped scatterlists

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It turns out that libata has already dma_map_sg'd the scatterlist
entries that go with an ata_queued_cmd by the time it calls
sas_ata_qc_issue.  sas_ata_qc_issue passes this scatterlist to aic94xx.
Unfortunately, aic94xx assumes that any scatterlist passed to it needs
to be pci_map_sg'd... which blows away the mapping that libata created!
This causes (on a x260) Calgary IOMMU table leaks and duplicate frees
when aic94xx and libata try to {pci,dma}_unmap_sg the scatterlist.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>

Key this check off ATA_PROTOCOL_STP

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

...

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Darrick J. Wong 2006-11-10 16:59:24 -08:00 • committed by James Bottomley

parent 338ec57003

commit ba330ffebb

1 changed files with 13 additions and 6 deletions

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19

drivers/scsi/aic94xx/aic94xx_task.c

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