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 /drivers/ata | |
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 'drivers/ata')
-rw-r--r-- | drivers/ata/libata-core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 8824c8da3f2f..82af7011f2dd 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c | |||
@@ -2158,6 +2158,10 @@ retry: | |||
2158 | static inline u8 ata_dev_knobble(struct ata_device *dev) | 2158 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
2159 | { | 2159 | { |
2160 | struct ata_port *ap = dev->link->ap; | 2160 | struct ata_port *ap = dev->link->ap; |
2161 | |||
2162 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) | ||
2163 | return 0; | ||
2164 | |||
2161 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | 2165 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
2162 | } | 2166 | } |
2163 | 2167 | ||
@@ -4062,6 +4066,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = { | |||
4062 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | 4066 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, |
4063 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | 4067 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, |
4064 | 4068 | ||
4069 | /* Devices that do not need bridging limits applied */ | ||
4070 | { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, | ||
4071 | |||
4065 | /* End Marker */ | 4072 | /* End Marker */ |
4066 | { } | 4073 | { } |
4067 | }; | 4074 | }; |