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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-02 19:28:58 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-02 19:28:58 -0800 |
| commit | b1792e367053968f2ddb48bc911d314143ce6242 (patch) | |
| tree | 31ac3fddb0b14a202e9ceaa9681c1335ba35210c /drivers/pci/msi.c | |
| parent | 859281ff370977f917ec2195f86a5bfccf1fc6d6 (diff) | |
| parent | 71a082efc9fdc12068a3cee6cebb1330b00ebeee (diff) | |
| download | linux-b1792e367053968f2ddb48bc911d314143ce6242.tar.bz2 | |
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 hotplug: Change link order of pciehp & acpiphp
PCI hotplug: fakephp: Allocate PCI resources before adding the device
PCI MSI: Fix undefined shift by 32
PCI PM: Do not wait for buses in B2 or B3 during resume
PCI PM: Power up devices before restoring their state
PCI PM: Fix hibernation breakage on EeePC 701
PCI: irq and pci_ids patch for Intel Tigerpoint DeviceIDs
PCI PM: Fix suspend error paths and testing facility breakage
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 896a15d70f5b..44f15ff70c1d 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -103,6 +103,16 @@ static void msix_set_enable(struct pci_dev *dev, int enable) } } +/* + * Essentially, this is ((1 << (1 << x)) - 1), but without the + * undefinedness of a << 32. + */ +static inline __attribute_const__ u32 msi_mask(unsigned x) +{ + static const u32 mask[] = { 1, 2, 4, 0xf, 0xff, 0xffff, 0xffffffff }; + return mask[x]; +} + static void msix_flush_writes(struct irq_desc *desc) { struct msi_desc *entry; @@ -407,8 +417,7 @@ static int msi_capability_init(struct pci_dev *dev) /* All MSIs are unmasked by default, Mask them all */ pci_read_config_dword(dev, base, &maskbits); - temp = (1 << multi_msi_capable(control)); - temp = ((temp - 1) & ~temp); + temp = msi_mask((control & PCI_MSI_FLAGS_QMASK) >> 1); maskbits |= temp; pci_write_config_dword(dev, base, maskbits); entry->msi_attrib.maskbits_mask = temp; |