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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2007-12-18 00:39:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-01 15:04:26 -0800 |
| commit | e64aeccbeca1f7e22174ca3a12ec35a8f5566515 (patch) | |
| tree | ee091a713624bfcb8faae2e06852efd8faaea816 /drivers/pci/quirks.c | |
| parent | 3609801ecc63e7def325752a19065980410d37ad (diff) | |
| download | blackbird-op-linux-e64aeccbeca1f7e22174ca3a12ec35a8f5566515.tar.gz blackbird-op-linux-e64aeccbeca1f7e22174ca3a12ec35a8f5566515.zip | |
PCI: fix for quirk_e100_interrupt()
Check that the e100 is in the D0 power state. If it's not, it won't
respond to MMIO accesses and we end up with master-abort machine
checks on some platforms.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 63357f07ca43..637903a2df3a 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1415,9 +1415,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID, quirk_netmos); static void __devinit quirk_e100_interrupt(struct pci_dev *dev) { - u16 command; + u16 command, pmcsr; u8 __iomem *csr; u8 cmd_hi; + int pm; switch (dev->device) { /* PCI IDs taken from drivers/net/e100.c */ @@ -1451,6 +1452,17 @@ static void __devinit quirk_e100_interrupt(struct pci_dev *dev) if (!(command & PCI_COMMAND_MEMORY) || !pci_resource_start(dev, 0)) return; + /* + * Check that the device is in the D0 power state. If it's not, + * there is no point to look any further. + */ + pm = pci_find_capability(dev, PCI_CAP_ID_PM); + if (pm) { + pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr); + if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) + return; + } + /* Convert from PCI bus to resource space. */ csr = ioremap(pci_resource_start(dev, 0), 8); if (!csr) { |
