Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"

commit fe25d078874f2c29c38f4160467d74f5756537c9 upstream.

Revert 8affb487d4a4 ("x86/PCI: Don't alloc pcibios-irq when MSI is
enabled").

This is part of reverting 991de2e59090 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
CC: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index eccd4d99e6a4a7182bf74469f5ecd580e8f22417..dc78a4a9a46663f10600afd013d9230fe5fe222b 100644 (file)
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -675,14 +675,6 @@ int pcibios_add_device(struct pci_dev *dev)
 
 int pcibios_alloc_irq(struct pci_dev *dev)
 {
-       /*
-        * If the PCI device was already claimed by core code and has
-        * MSI enabled, probing of the pcibios IRQ will overwrite
-        * dev->irq.  So bail out if MSI is already enabled.
-        */
-       if (pci_dev_msi_enabled(dev))
-               return -EBUSY;
-
        return pcibios_enable_irq(dev);
 }