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authorTejun Heo <tj@kernel.org>2008-11-03 20:03:17 +0900
committerJeff Garzik <jgarzik@redhat.com>2008-12-28 22:43:20 -0500
commit1eca4365be25c540650693e941bc06a66cf38f94 (patch)
treee3ed82850da00308180bf166118f9f9e69d92898 /drivers/ata/pata_platform.c
parent3c92ec8ae91ecf59d88c798301833d7cf83f2179 (diff)
libata: beef up iterators
There currently are the following looping constructs. * __ata_port_for_each_link() for all available links * ata_port_for_each_link() for edge links * ata_link_for_each_dev() for all devices * ata_link_for_each_dev_reverse() for all devices in reverse order Now there's a need for looping construct which is similar to __ata_port_for_each_link() but iterates over PMP links before the host link. Instead of adding another one with long name, do the following cleanup. * Implement and export ata_link_next() and ata_dev_next() which take @mode parameter and can be used to build custom loop. * Implement ata_for_each_link() and ata_for_each_dev() which take looping mode explicitly. The following iteration modes are implemented. * ATA_LITER_EDGE : loop over edge links * ATA_LITER_HOST_FIRST : loop over all links, host link first * ATA_LITER_PMP_FIRST : loop over all links, PMP links first * ATA_DITER_ENABLED : loop over enabled devices * ATA_DITER_ENABLED_REVERSE : loop over enabled devices in reverse order * ATA_DITER_ALL : loop over all devices * ATA_DITER_ALL_REVERSE : loop over all devices in reverse order This change removes exlicit device enabledness checks from many loops and makes it clear which ones are iterated over in which direction. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/pata_platform.c')
-rw-r--r--drivers/ata/pata_platform.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 77e4e3b17f5..6afa07a3764 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -34,14 +34,12 @@ static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unu
{
struct ata_device *dev;
- ata_link_for_each_dev(dev, link) {
- if (ata_dev_enabled(dev)) {
- /* We don't really care */
- dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
- dev->xfer_shift = ATA_SHIFT_PIO;
- dev->flags |= ATA_DFLAG_PIO;
- ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
- }
+ ata_for_each_dev(dev, link, ENABLED) {
+ /* We don't really care */
+ dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ dev->flags |= ATA_DFLAG_PIO;
+ ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
}
return 0;
}