From c791c30670ea61f19eec390124128bf278e854fe Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Thu, 28 Sep 2006 03:40:11 -0400 Subject: [PATCH] [libata] minor PCI IDE probe fixes and cleanups * Replace needless 'n_ports > 2' check with a simple BUG_ON(). No existing driver ever wants more than 2 ports. * Delete ATA_FLAG_NO_LEGACY check. No current driver uses ata_pci_init_one(), that sets this flag. * Move PCI_CLASS_PROG register read below pci_enable_device() * Handle ata_device_add() failure Signed-off-by: Jeff Garzik --- drivers/ata/libata-sff.c | 40 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 20 deletions(-) diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 08b3a40747..a620e235cc 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -946,35 +946,21 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, { struct ata_probe_ent *probe_ent = NULL; struct ata_port_info *port[2]; - u8 tmp8, mask; + u8 mask; unsigned int legacy_mode = 0; int disable_dev_on_err = 1; int rc; DPRINTK("ENTER\n"); + BUG_ON(n_ports < 1 || n_ports > 2); + port[0] = port_info[0]; if (n_ports > 1) port[1] = port_info[1]; else port[1] = port[0]; - if ((port[0]->flags & ATA_FLAG_NO_LEGACY) == 0 - && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { - /* TODO: What if one channel is in native mode ... */ - pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); - mask = (1 << 2) | (1 << 0); - if ((tmp8 & mask) != mask) - legacy_mode = (1 << 3); - } - - /* FIXME... */ - if ((!legacy_mode) && (n_ports > 2)) { - printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n"); - n_ports = 2; - /* For now */ - } - /* FIXME: Really for ATA it isn't safe because the device may be multi-purpose and we want to leave it alone if it was already enabled. Secondly for shared use as Arjan says we want refcounting @@ -987,6 +973,16 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, if (rc) return rc; + if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { + u8 tmp8; + + /* TODO: What if one channel is in native mode ... */ + pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); + mask = (1 << 2) | (1 << 0); + if ((tmp8 & mask) != mask) + legacy_mode = (1 << 3); + } + rc = pci_request_regions(pdev, DRV_NAME); if (rc) { disable_dev_on_err = 0; @@ -1039,7 +1035,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, goto err_out_regions; } - /* FIXME: If we get no DMA mask we should fall back to PIO */ + /* TODO: If we get no DMA mask we should fall back to PIO */ rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); if (rc) goto err_out_regions; @@ -1062,13 +1058,17 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, pci_set_master(pdev); - /* FIXME: check ata_device_add return */ - ata_device_add(probe_ent); + if (!ata_device_add(probe_ent)) { + rc = -ENODEV; + goto err_out_ent; + } kfree(probe_ent); return 0; +err_out_ent: + kfree(probe_ent); err_out_regions: if (legacy_mode & ATA_PORT_PRIMARY) release_region(ATA_PRIMARY_CMD, 8); -- 2.20.1