From f58229f8060055b08b34008ea08f31de1e2f003c Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 6 Aug 2007 18:36:23 +0900 Subject: 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 Signed-off-by: Jeff Garzik --- drivers/ata/ata_generic.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/ata/ata_generic.c') diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c index b5e390ff5bd..44328a16075 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 { -- cgit v1.2.3