firewire: nosy: fix IRQ handler for card ejection

Untested, I don't have a PCILynx CardBus card.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c
index 57a1100f8f4e..a241b62630b2 100644
--- a/drivers/firewire/nosy.c
+++ b/drivers/firewire/nosy.c
@@ -444,6 +444,10 @@ irq_handler(int irq, void *device)
 
         pci_int_status = reg_read(lynx, PCI_INT_STATUS);
 
+        if (pci_int_status == ~0)
+                /* Card was ejected. */
+                return IRQ_NONE;
+
         if ((pci_int_status & PCI_INT_INT_PEND) == 0)
                 /* Not our interrupt, bail out quickly. */
                 return IRQ_NONE;