From fea63e38013ec628ab3f7fddc4c2148064b7910a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 16 Sep 2006 03:04:15 +0900 Subject: [PATCH] [PATCH] libata: fix non-uniform ports handling Non-uniform ports handling got broken while updating libata to handle those in the same host. Only separate irq for the non-uniform secondary port was implemented while all other fields (host flags, transfer mode...) of the secondary port simply shared those of the first. For ata_piix combined mode, which ATM is the only user of non-uniform ports, this causes the secondary port assume the wrong type. This can cause PATA port to use SATA ops, which results in bogus check on PCS and detection failure. This patch adds ata_probe_ent->pinfo2 which points to optional port_info for the secondary port. For the time being, this seems to be the simplest solution. This workaround will be removed together with ata_probe_ent itself after init model is updated to allow more flexibility. Signed-off-by: Tejun Heo Cc: Alan Cox Cc: Nelson A. de Oliveira Signed-off-by: Jeff Garzik --- drivers/ata/libata-core.c | 18 +++++++++++++----- drivers/ata/libata-sff.c | 2 ++ include/linux/libata.h | 8 ++++++++ 3 files changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 1c9315401f7a..bb66a12c84e5 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5269,11 +5269,19 @@ void ata_port_init(struct ata_port *ap, struct ata_host *host, ap->host = host; ap->dev = ent->dev; ap->port_no = port_no; - ap->pio_mask = ent->pio_mask; - ap->mwdma_mask = ent->mwdma_mask; - ap->udma_mask = ent->udma_mask; - ap->flags |= ent->port_flags; - ap->ops = ent->port_ops; + if (port_no == 1 && ent->pinfo2) { + ap->pio_mask = ent->pinfo2->pio_mask; + ap->mwdma_mask = ent->pinfo2->mwdma_mask; + ap->udma_mask = ent->pinfo2->udma_mask; + ap->flags |= ent->pinfo2->flags; + ap->ops = ent->pinfo2->port_ops; + } else { + ap->pio_mask = ent->pio_mask; + ap->mwdma_mask = ent->mwdma_mask; + ap->udma_mask = ent->udma_mask; + ap->flags |= ent->port_flags; + ap->ops = ent->port_ops; + } ap->hw_sata_spd_limit = UINT_MAX; ap->active_tag = ATA_TAG_POISON; ap->last_ctl = 0xFF; diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index d51dc41fa195..688bb55e197a 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -858,6 +858,7 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int probe_ent->port[p].bmdma_addr = bmdma; } ata_std_ports(&probe_ent->port[p]); + probe_ent->pinfo2 = port[1]; p++; } @@ -907,6 +908,7 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, probe_ent->_host_flags |= ATA_HOST_SIMPLEX; } ata_std_ports(&probe_ent->port[1]); + probe_ent->pinfo2 = port[1]; } else probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY; diff --git a/include/linux/libata.h b/include/linux/libata.h index 8715305f611f..ff67e7524fe9 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -361,6 +361,14 @@ struct ata_probe_ent { unsigned long _host_flags; void __iomem *mmio_base; void *private_data; + + /* port_info for the secondary port. Together with irq2, it's + * used to implement non-uniform secondary port. Currently, + * the only user is ata_piix combined mode. This workaround + * will be removed together with ata_probe_ent when init model + * is updated. + */ + const struct ata_port_info *pinfo2; }; struct ata_host {