diff options
| author | Brad Campbell <brad@wasp.net.au> | 2005-05-12 15:07:47 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-05-12 15:07:47 -0400 |
| commit | 6f2f38128170814e151cfedf79532e19cd179567 (patch) | |
| tree | 6728b987c6d4199c4d03335407f5b55859b34a86 /drivers/scsi | |
| parent | 88d7bd8cb9eb8d64bf7997600b0d64f7834047c5 (diff) | |
| download | kernel_samsung_smdk4412-6f2f38128170814e151cfedf79532e19cd179567.zip kernel_samsung_smdk4412-6f2f38128170814e151cfedf79532e19cd179567.tar.gz kernel_samsung_smdk4412-6f2f38128170814e151cfedf79532e19cd179567.tar.bz2 | |
[PATCH] libata basic detection and errata for PATA->SATA bridges
This patch works around an issue with WD drives (and possibly others)
over SiL PATA->SATA Bridges on SATA controllers locking up with
transfers > 200 sectors.
Signed-off-by: Brad Campbell <brad@wasp.net.au>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/libata-core.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 0b5d3a5..8b5a3f0 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1186,6 +1186,37 @@ err_out: DPRINTK("EXIT, err\n"); } + +static inline u8 ata_dev_knobble(struct ata_port *ap) +{ + return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id))); +} + +/** + * ata_dev_config - Run device specific handlers and check for + * SATA->PATA bridges + * @ap: Bus + * @i: Device + * + * LOCKING: + */ + +void ata_dev_config(struct ata_port *ap, unsigned int i) +{ + /* limit bridge transfers to udma5, 200 sectors */ + if (ata_dev_knobble(ap)) { + printk(KERN_INFO "ata%u(%u): applying bridge limits\n", + ap->id, ap->device->devno); + ap->udma_mask &= ATA_UDMA5; + ap->host->max_sectors = ATA_MAX_SECTORS; + ap->host->hostt->max_sectors = ATA_MAX_SECTORS; + ap->device->flags |= ATA_DFLAG_LOCK_SECTORS; + } + + if (ap->ops->dev_config) + ap->ops->dev_config(ap, &ap->device[i]); +} + /** * ata_bus_probe - Reset and probe ATA bus * @ap: Bus to probe @@ -1208,8 +1239,7 @@ static int ata_bus_probe(struct ata_port *ap) ata_dev_identify(ap, i); if (ata_dev_present(&ap->device[i])) { found = 1; - if (ap->ops->dev_config) - ap->ops->dev_config(ap, &ap->device[i]); + ata_dev_config(ap,i); } } @@ -4014,6 +4044,7 @@ EXPORT_SYMBOL_GPL(ata_scsi_release); EXPORT_SYMBOL_GPL(ata_host_intr); EXPORT_SYMBOL_GPL(ata_dev_classify); EXPORT_SYMBOL_GPL(ata_dev_id_string); +EXPORT_SYMBOL_GPL(ata_dev_config); EXPORT_SYMBOL_GPL(ata_scsi_simulate); #ifdef CONFIG_PCI |