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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-18 15:05:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-18 15:05:22 -0700 |
| commit | 2044f2282d7558c765270d78e19dbdcf6190ca71 (patch) | |
| tree | 03b2c4d211fa8e7e2ef8c489d28a16442f030d57 | |
| parent | bea9a6d239cb2aa2ced4dcb0a05e1827ce61fa3d (diff) | |
| parent | 58c84eda07560a6b75b03e8d3b26d6eddfc14011 (diff) | |
| download | linux-stable-2044f2282d7558c765270d78e19dbdcf6190ca71.tar.gz linux-stable-2044f2282d7558c765270d78e19dbdcf6190ca71.tar.bz2 linux-stable-2044f2282d7558c765270d78e19dbdcf6190ca71.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI: fall back to original BIOS BAR addresses
| -rw-r--r-- | arch/x86/pci/i386.c | 1 | ||||
| -rw-r--r-- | drivers/pci/setup-res.c | 32 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
3 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 6fdb3ec30c31..55253095be84 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -184,6 +184,7 @@ static void __init pcibios_allocate_resources(int pass) idx, r, disabled, pass); if (pci_claim_resource(dev, idx) < 0) { /* We'll assign a new address later */ + dev->fw_addr[idx] = r->start; r->end -= r->start; r->start = 0; } diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 92379e2d37e7..2aaa13150de3 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -156,6 +156,38 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev, pcibios_align_resource, dev); } + if (ret < 0 && dev->fw_addr[resno]) { + struct resource *root, *conflict; + resource_size_t start, end; + + /* + * If we failed to assign anything, let's try the address + * where firmware left it. That at least has a chance of + * working, which is better than just leaving it disabled. + */ + + if (res->flags & IORESOURCE_IO) + root = &ioport_resource; + else + root = &iomem_resource; + + start = res->start; + end = res->end; + res->start = dev->fw_addr[resno]; + res->end = res->start + size - 1; + dev_info(&dev->dev, "BAR %d: trying firmware assignment %pR\n", + resno, res); + conflict = request_resource_conflict(root, res); + if (conflict) { + dev_info(&dev->dev, + "BAR %d: %pR conflicts with %s %pR\n", resno, + res, conflict->name, conflict); + res->start = start; + res->end = end; + } else + ret = 0; + } + if (!ret) { res->flags &= ~IORESOURCE_STARTALIGN; dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res); diff --git a/include/linux/pci.h b/include/linux/pci.h index 7cb00845f150..f26fda76b87f 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -288,6 +288,7 @@ struct pci_dev { */ unsigned int irq; struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ + resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */ /* These fields are used by common fixups */ unsigned int transparent:1; /* Transparent PCI bridge */ |