diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/probe.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index ef09f5f2fe6c..c7f8b717c2e7 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -171,6 +171,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, struct resource *res, unsigned int pos) { u32 l, sz, mask; + u64 l64, sz64, mask64; u16 orig_cmd; struct pci_bus_region region, inverted_region; bool bar_too_big = false, bar_disabled = false; @@ -226,9 +227,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, } if (res->flags & IORESOURCE_MEM_64) { - u64 l64 = l; - u64 sz64 = sz; - u64 mask64 = mask | (u64)~0 << 32; + l64 = l; + sz64 = sz; + mask64 = mask | (u64)~0 << 32; pci_read_config_dword(dev, pos + 4, &l); pci_write_config_dword(dev, pos + 4, ~0); @@ -243,9 +244,13 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, if (!sz64) goto fail; - if ((sizeof(resource_size_t) < 8) && (sz64 > 0x100000000ULL)) { + if ((sizeof(dma_addr_t) < 8 || sizeof(resource_size_t) < 8) && + sz64 > 0x100000000ULL) { + res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; + res->start = 0; + res->end = 0; bar_too_big = true; - goto fail; + goto out; } if ((sizeof(resource_size_t) < 8) && l) { @@ -303,7 +308,8 @@ out: pci_write_config_word(dev, PCI_COMMAND, orig_cmd); if (bar_too_big) - dev_err(&dev->dev, "reg 0x%x: can't handle 64-bit BAR\n", pos); + dev_err(&dev->dev, "reg 0x%x: can't handle BAR larger than 4GB (size %#010llx)\n", + pos, (unsigned long long) sz64); if (res->flags && !bar_disabled) dev_printk(KERN_DEBUG, &dev->dev, "reg 0x%x: %pR\n", pos, res); |
