diff options
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 45 |
1 files changed, 26 insertions, 19 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a10ed9dab2c2..f89dbc3738b7 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -180,25 +180,31 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) res->flags |= pci_calc_resource_flags(l); if ((l & (PCI_BASE_ADDRESS_SPACE | PCI_BASE_ADDRESS_MEM_TYPE_MASK)) == (PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64)) { - pci_read_config_dword(dev, reg+4, &l); + u32 szhi, lhi; + pci_read_config_dword(dev, reg+4, &lhi); + pci_write_config_dword(dev, reg+4, ~0); + pci_read_config_dword(dev, reg+4, &szhi); + pci_write_config_dword(dev, reg+4, lhi); + szhi = pci_size(lhi, szhi, 0xffffffff); next++; #if BITS_PER_LONG == 64 - res->start |= ((unsigned long) l) << 32; + res->start |= ((unsigned long) lhi) << 32; res->end = res->start + sz; - pci_write_config_dword(dev, reg+4, ~0); - pci_read_config_dword(dev, reg+4, &sz); - pci_write_config_dword(dev, reg+4, l); - sz = pci_size(l, sz, 0xffffffff); - if (sz) { + if (szhi) { /* This BAR needs > 4GB? Wow. */ - res->end |= (unsigned long)sz<<32; + res->end |= (unsigned long)szhi<<32; } #else - if (l) { - printk(KERN_ERR "PCI: Unable to handle 64-bit address for device %s\n", pci_name(dev)); + if (szhi) { + printk(KERN_ERR "PCI: Unable to handle 64-bit BAR for device %s\n", pci_name(dev)); res->start = 0; res->flags = 0; - continue; + } else if (lhi) { + /* 64-bit wide address, treat as disabled */ + pci_write_config_dword(dev, reg, l & ~(u32)PCI_BASE_ADDRESS_MEM_MASK); + pci_write_config_dword(dev, reg+4, 0); + res->start = 0; + res->end = sz; } #endif } @@ -377,9 +383,9 @@ struct pci_bus * __devinit pci_add_new_bus(struct pci_bus *parent, struct pci_de child = pci_alloc_child_bus(parent, dev, busnr); if (child) { - spin_lock(&pci_bus_lock); + down_write(&pci_bus_sem); list_add_tail(&child->node, &parent->children); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); } return child; } @@ -838,9 +844,9 @@ void __devinit pci_device_add(struct pci_dev *dev, struct pci_bus *bus) * and the bus list for fixup functions, etc. */ INIT_LIST_HEAD(&dev->global_list); - spin_lock(&pci_bus_lock); + down_write(&pci_bus_sem); list_add_tail(&dev->bus_list, &bus->devices); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); } struct pci_dev * __devinit @@ -975,9 +981,10 @@ struct pci_bus * __devinit pci_create_bus(struct device *parent, pr_debug("PCI: Bus %04x:%02x already known\n", pci_domain_nr(b), bus); goto err_out; } - spin_lock(&pci_bus_lock); + + down_write(&pci_bus_sem); list_add_tail(&b->node, &pci_root_buses); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); memset(dev, 0, sizeof(*dev)); dev->parent = parent; @@ -1017,9 +1024,9 @@ class_dev_create_file_err: class_dev_reg_err: device_unregister(dev); dev_reg_err: - spin_lock(&pci_bus_lock); + down_write(&pci_bus_sem); list_del(&b->node); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); err_out: kfree(dev); kfree(b); |