diff options
author | Jens Axboe <jens.axboe@oracle.com> | 2008-08-27 09:23:18 -0400 |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2008-10-31 01:45:06 -0400 |
commit | 9ce8e3073d9cfd6f859c22a25441db41b85cbf6e (patch) | |
tree | 81ddeb3d7203677b541b132b4ed8a909137d7ccf /include/linux | |
parent | b9d5b89b487517cbd4cb4702da829e07ef9e4432 (diff) |
libata: add whitelist for devices with known good pata-sata bridges
libata currently imposes a UDMA5 max transfer rate and 200 sector max
transfer size for SATA devices that sit behind a pata-sata bridge. Lots
of devices have known good bridges that don't need this limit applied.
The MTRON SSD disks are such devices. Transfer rates are increased by
20-30% with the restriction removed.
So add a "blacklist" entry for the MTRON devices, with a flag indicating
that the bridge is known good.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/libata.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 507f53ef8038..f5441edee55f 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h | |||
@@ -372,6 +372,7 @@ enum { | |||
372 | ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ | 372 | ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ |
373 | ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ | 373 | ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ |
374 | ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ | 374 | ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ |
375 | ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ | ||
375 | 376 | ||
376 | /* DMA mask for user DMA control: User visible values; DO NOT | 377 | /* DMA mask for user DMA control: User visible values; DO NOT |
377 | renumber */ | 378 | renumber */ |