PCI: Remove MSI/MSI-X cap check in pci_msi_check_device()

The function pci_msi_check_device() is called while enabling MSI
or MSI-X interrupts to make sure the PCI device can support MSI
or MSI-X capability.  This patch removes the check on MSI or MSI-X
capability in the function and lets the caller do the check.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 99befbd99938..60a4b10fa99c 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -789,9 +789,6 @@ static int pci_msi_check_device(struct pci_dev *dev, int nvec, int type)
         if (ret)
                 return ret;
 
-        if (!pci_find_capability(dev, type))
-                return -EINVAL;
-
         return 0;
 }
 
@@ -942,7 +939,7 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
         int status, nr_entries;
         int i, j;
 
-        if (!entries)
+        if (!entries || !dev->msix_cap)
                 return -EINVAL;
 
         status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSIX);