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PCI: Add mask bit definition for MSI-X table 

Then we can use it instead of magic number 1.

Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Sheng Yang 2010-11-11 15:46:55 +08:00 committed by Jesse Barnes
parent 00aaaef9a5
commit 8d80528696
2 changed files with 4 additions and 2 deletions
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5
drivers/pci/msi.c
View File

@ -168,8 +168,9 @@ static u32 __msix_mask_irq(struct msi_desc *desc, u32 flag)
u32 mask_bits = desc->masked;
unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL;
mask_bits &= ~1;
mask_bits |= flag;
mask_bits &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
if (flag)
mask_bits |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
writel(mask_bits, desc->mask_base + offset);
return mask_bits;

1
include/linux/pci_regs.h
View File

@ -315,6 +315,7 @@
#define PCI_MSIX_ENTRY_UPPER_ADDR 4
#define PCI_MSIX_ENTRY_DATA 8
#define PCI_MSIX_ENTRY_VECTOR_CTRL 12
#define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
/* CompactPCI Hotswap Register */