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| author | Tejun Heo <htejun@gmail.com> | 2006-04-02 17:54:47 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-04-02 10:02:58 -0400 |
| commit | 565083e1f14e7771aa6bac2d3d4aae0b08d48d78 (patch) | |
| tree | 8e6a81175297d3d03aa1eede59fcb635d65380e2 /drivers/scsi/libata-core.c | |
| parent | 14d2bac1877ed4e2cc940d1680db1a4f29225811 (diff) | |
| download | linux-565083e1f14e7771aa6bac2d3d4aae0b08d48d78.tar.gz | |
[PATCH] libata: consider disabled devices in ata_dev_xfermask()
ata_bus_probe() now marks failed devices properly and leaves
meaningful transfer mode masks. This patch makes ata_dev_xfermask()
consider disable devices when determining PIO mode to avoid violating
device selection timing.
While at it, move port-wide resttriction out of device iteration loop
and try to make the function look a bit prettier.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/scsi/libata-core.c')
| -rw-r--r-- | drivers/scsi/libata-core.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 33b5bff58cc3a..00018705582bb 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -2913,23 +2913,34 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) unsigned long xfer_mask; int i; - xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, - ap->udma_mask); + xfer_mask = ata_pack_xfermask(ap->pio_mask, + ap->mwdma_mask, ap->udma_mask); + + /* Apply cable rule here. Don't apply it early because when + * we handle hot plug the cable type can itself change. + */ + if (ap->cbl == ATA_CBL_PATA40) + xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); /* FIXME: Use port-wide xfermask for now */ for (i = 0; i < ATA_MAX_DEVICES; i++) { struct ata_device *d = &ap->device[i]; - if (!ata_dev_enabled(d)) + + if (ata_dev_absent(d)) + continue; + + if (ata_dev_disabled(d)) { + /* to avoid violating device selection timing */ + xfer_mask &= ata_pack_xfermask(d->pio_mask, + UINT_MAX, UINT_MAX); continue; - xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask, - d->udma_mask); + } + + xfer_mask &= ata_pack_xfermask(d->pio_mask, + d->mwdma_mask, d->udma_mask); xfer_mask &= ata_id_xfermask(d->id); if (ata_dma_blacklisted(d)) xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); - /* Apply cable rule here. Don't apply it early because when - we handle hot plug the cable type can itself change */ - if (ap->cbl == ATA_CBL_PATA40) - xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); } if (ata_dma_blacklisted(dev)) @@ -2940,11 +2951,12 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) if (hs->simplex_claimed) xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); } + if (ap->ops->mode_filter) xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); - ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, - &dev->udma_mask); + ata_unpack_xfermask(xfer_mask, &dev->pio_mask, + &dev->mwdma_mask, &dev->udma_mask); } /** |