Darrick J. Wong wrote:
> This patch adds SATAII NCQ support to libsas. Both the use_ncq and the
> dma_xfer flags in ata_task must be set for NCQ to work correctly on the
> Adaptec SAS controller. The rest of the patch adds ATA_FLAG_NCQ to
> sata_port_info and sets up ap->scsi_host so that ata_setup_ncq doesn't
> crash. Please note that this patch is against the aic94xx-sas git tree,
> not scsi-misc. Thanks also to James Bottomley for providing an earlier
> version of this patch from which to work.
> @@ -875,6 +881,7 @@ int sas_target_alloc(struct scsi_target
>
> ap->private_data = found_dev;
> ap->cbl = ATA_CBL_SATA;
> + ap->scsi_host = shost;
> found_dev->sata_dev.ap = ap;
> }
>
This doesn't look like the right fix for the oops you were seeing. The
SAS usage of libata has ap->scsi_host as NULL, which indicates that
libata does not own the associated scsi_host. I'm concerned you may
have broken some other code path by making this change. I think the correct
fix may require removing the dependence of ap->scsi_host from
ata_dev_config_ncq.
Brian
--
Brian King
eServer Storage I/O
IBM Linux Technology Center
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
