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authorSheng Yang <sheng@linux.intel.com>2010-11-11 15:46:55 +0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-12-23 12:53:08 -0800
commit8d805286968811223cca002134ba3d81244d5313 (patch)
treed67154a6c21d9b0c9b71a9cf7bfc4e636737e73e
parent00aaaef9a51a1a25c5d6d52ce510772f149a0eb0 (diff)
downloadop-kernel-dev-8d805286968811223cca002134ba3d81244d5313.zip
op-kernel-dev-8d805286968811223cca002134ba3d81244d5313.tar.gz
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>
-rw-r--r--drivers/pci/msi.c5
-rw-r--r--include/linux/pci_regs.h1
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 7c24dce..44b0aee 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -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;
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index b21d33e..d4f2c80 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -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 */
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