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| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-07-06 22:08:18 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-07-10 05:49:24 +0400 |
| commit | bbffe435248444065bd76141c41bbe65db950cc9 (patch) | |
| tree | 84b48d12edc48040856f9feeeee70a82fe39852b /drivers/pci/probe.c | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
| download | linux-bbffe435248444065bd76141c41bbe65db950cc9.tar.xz | |
PCI: leave MEM and IO decoding disabled during 64-bit BAR sizing, too
After 253d2e5498, we disable MEM and IO decoding for most devices while we
size 32-bit BARs. However, we restore the original COMMAND register before
we size the upper 32 bits of 64-bit BARs, so we can still cause a conflict.
This patch waits to restore the original COMMAND register until we're
completely finished sizing the BAR.
Reference: https://lkml.org/lkml/2007/8/25/154
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 658ac977cb56..66b3a6ffe5a0 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -152,9 +152,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, pci_read_config_dword(dev, pos, &sz); pci_write_config_dword(dev, pos, l); - if (!dev->mmio_always_on) - pci_write_config_word(dev, PCI_COMMAND, orig_cmd); - /* * All bits set in sz means the device isn't working properly. * If the BAR isn't implemented, all bits must be 0. If it's a @@ -239,6 +236,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, } out: + if (!dev->mmio_always_on) + pci_write_config_word(dev, PCI_COMMAND, orig_cmd); + return (res->flags & IORESOURCE_MEM_64) ? 1 : 0; fail: res->flags = 0; |