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author | Arnd Hannemann <arnd@arndnet.de> | 2012-08-17 12:11:15 +0400 |
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committer | Jeff Garzik <jgarzik@redhat.com> | 2012-08-17 21:26:51 +0400 |
commit | 1117c811a64d948c9f88ee80a0c7f35e9fea1d69 (patch) | |
tree | d42fe642ad49ee07335e0004ec725f7821bfbd9c /drivers/ata/ahci.c | |
parent | bbb4ab43f82adf02c8b4d0d7e7b7e79d24204b05 (diff) | |
download | linux-1117c811a64d948c9f88ee80a0c7f35e9fea1d69.tar.xz |
pata_atiixp: override cable detection on MSI E350DM-E33
The mainboard MSI E350DM-E33 is advertised with 6 SATA ports.
As it turns out, two of them seem to be driven by on-board
SATA<->PATA converters. If a disk drive is connected to one
of them kernel uses UDMA/33 mode due to cable detection:
[ 34.550823] scsi4 : pata_atiixp
[ 34.555517] scsi5 : pata_atiixp
[ 34.555942] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
[ 34.555948] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
...
[ 35.040799] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[ 35.040806] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 35.040817] ata5.00: limited to UDMA/33 due to 40-wire cable
[ 35.049166] ata5.00: configured for UDMA/33
[ 35.049402] scsi 4:0:0:0: Direct-Access ATA WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
This patch forces "short cable" mode on this board, as it seems clear that
the on-board SATA<->PATA "cable" is short.
With this patch the disk is configured for UDMA/100:
[ 5.976756] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[ 5.996434] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 6.024787] ata5.00: configured for UDMA/100
Testing revealed no transfer issues.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/ahci.c')
0 files changed, 0 insertions, 0 deletions