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| author |   Tejun Heo <htejun@gmail.com> | 2007-08-06 18:36:23 +0900 |
|---|---|---|
| committer |   Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:30 -0400 |
| commit | f58229f8060055b08b34008ea08f31de1e2f003c (patch) | |
| tree | 6ca5ef546671cb975ef3632fb032c238eaf1bb4c /drivers/ata/ata_generic.c | |
| parent | libata-link: introduce ata_link (diff) | |
| download | linux-dev-f58229f8060055b08b34008ea08f31de1e2f003c.tar.xz linux-dev-f58229f8060055b08b34008ea08f31de1e2f003c.zip | |
libata-link: implement and use link/device iterators
Multiple links and different number of devices per link should be
considered to iterate over links and devices. This patch implements
and uses link and device iterators - ata_port_for_each_link() and
ata_link_for_each_dev() - and ata_link_max_devices().
This change makes a lot of functions iterate over only possible
devices instead of from dev 0 to dev ATA_MAX_DEVICES. All such
changes have been examined and nothing should be broken.
While at it, add a separating comment before device helpers to
distinguish them better from link helpers and others.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/ata_generic.c')
| -rw-r--r-- | drivers/ata/ata_generic.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c index b5e390ff5bd8..44328a16075c 100644 --- a/drivers/ata/ata_generic.c +++ b/drivers/ata/ata_generic.c @@ -46,21 +46,20 @@ static int generic_set_mode(struct ata_port *ap, struct ata_device **unused) { int dma_enabled = 0; - int i; + struct ata_device *dev; /* Bits 5 and 6 indicate if DMA is active on master/slave */ if (ap->ioaddr.bmdma_addr) dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); - for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->link.device[i]; + ata_link_for_each_dev(dev, &ap->link) { if (ata_dev_enabled(dev)) { /* We don't really care */ dev->pio_mode = XFER_PIO_0; dev->dma_mode = XFER_MW_DMA_0; /* We do need the right mode information for DMA or PIO and this comes from the current configuration flags */ - if (dma_enabled & (1 << (5 + i))) { + if (dma_enabled & (1 << (5 + dev->devno))) { ata_id_to_dma_mode(dev, XFER_MW_DMA_0); dev->flags &= ~ATA_DFLAG_PIO; } else { |