Subject: [PATCH] pci/msi: remove redundant calculation in msi_setup_msi_desc

[黄少波 <huangshaobo3@xiaomi.com>]

Whether to support 64-bit address status has been calculated before,
and the calculation result can be used directly afterwards, so use
msi_attrib.is_64 to avoid double calculation.

Suggested-by: weipengliang <weipengliang@xiaomi.com>
Signed-off-by: sparkhuang <huangshaobo3@xiaomi.com>
---
 drivers/pci/msi/msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index ef1d885..304e889 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -303,7 +303,7 @@ static int msi_setup_msi_desc(struct pci_dev *dev, int nvec,
        desc.pci.msi_attrib.multiple    = ilog2(__roundup_pow_of_two(nvec));
        desc.affinity                   = masks;

-       if (control & PCI_MSI_FLAGS_64BIT)
+       if (desc.pci.msi_attrib.is_64)
                desc.pci.mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
        else
                desc.pci.mask_pos = dev->msi_cap + PCI_MSI_MASK_32;
--
2.7.4

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