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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2005-08-07 13:49:59 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-07 09:50:56 -0700 |
| commit | cf7bee5a0bf270a4eace0be39329d6ac0136cc47 (patch) | |
| tree | f2df9af0c11dbc0411f628d709e60de46296d799 /drivers/pci/setup-res.c | |
| parent | 0d317fb72fe3cf0f611608cf3a3015bbe6cd2a66 (diff) | |
| download | linux-cf7bee5a0bf270a4eace0be39329d6ac0136cc47.tar.bz2 | |
[PATCH] Fix restore of 64-bit PCI BAR's
For 64-bit BAR[i] only pci_dev->resource[i] is valid, ->resource[i+1]
slot is unused and contains zeroes in all fields.
So when we update a PCI BAR, all we need is just to check that we're
going to update a _valid_ resource.
Also make sure to write high bits - use "x >> 16 >> 16" (rather than the
simpler ">> 32") to avoid warnings on 32-bit architectures where we're
not going to have any high bits.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/pci/setup-res.c')
| -rw-r--r-- | drivers/pci/setup-res.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 878fd0a65c02..589486704ce3 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -33,6 +33,11 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno) u32 new, check, mask; int reg; + /* Ignore resources for unimplemented BARs and unused resource slots + for 64 bit BARs. */ + if (!res->flags) + return; + pcibios_resource_to_bus(dev, ®ion, res); pr_debug(" got res [%lx:%lx] bus [%lx:%lx] flags %lx for " @@ -67,7 +72,7 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno) if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) == (PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) { - new = 0; /* currently everyone zeros the high address */ + new = region.start >> 16 >> 16; pci_write_config_dword(dev, reg + 4, new); pci_read_config_dword(dev, reg + 4, &check); if (check != new) { |