MSI: Consolidate BUG_ON()s.

When freeing MSIs and MSI-Xs, we BUG_ON() if the irq has not been
freed, ie. if it still has an action. We can consolidate all of these
BUG_ON()s into msi_free_irqs() as all the code paths lead there almost
immediately anyway.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 7 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 4f326f38f9bf..38e4c807f80f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -573,8 +573,6 @@ void pci_disable_msi(struct pci_dev* dev)
                 return;
         }
 
-        BUG_ON(irq_has_action(dev->first_msi_irq));
-
         default_irq = entry->msi_attrib.default_irq;
         msi_free_irq(dev, dev->first_msi_irq);
 
@@ -590,6 +588,8 @@ static int msi_free_irq(struct pci_dev* dev, int irq)
         int head, entry_nr, type;
         void __iomem *base;
 
+        BUG_ON(irq_has_action(irq));
+
         entry = get_irq_msi(irq);
         if (!entry || entry->dev != dev) {
                 return -EINVAL;
@@ -682,8 +682,6 @@ static void msix_free_all_irqs(struct pci_dev *dev)
         while (head != tail) {
                 tail = get_irq_msi(irq)->link.tail;
 
-                BUG_ON(irq_has_action(irq));
-
                 if (irq != head)
                         msi_free_irq(dev, irq);
                 irq = tail;
@@ -723,10 +721,8 @@ void msi_remove_pci_irq_vectors(struct pci_dev* dev)
         if (!pci_msi_enable || !dev)
                 return;
 
-        if (dev->msi_enabled) {
-                BUG_ON(irq_has_action(dev->first_msi_irq));
+        if (dev->msi_enabled)
                 msi_free_irq(dev, dev->first_msi_irq);
-        }
 
         if (dev->msix_enabled)
                 msix_free_all_irqs(dev);