IB/mthca: Don't double-free IRQs when falling back from MSI-X to INTx
When both MSI-X and legacy INTx fail to generate an interrupt, the
driver frees the MSI-X interrupts twice. Fix this by clearing the
have_irq flag for the MSI-X interrupts when they are freed the first
time.
Reported-by: Yinghai Lu <yhlu.kernel@gmail.com>
Tested-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c
index 28f0e0c..90e4e45 100644
--- a/drivers/infiniband/hw/mthca/mthca_eq.c
+++ b/drivers/infiniband/hw/mthca/mthca_eq.c
@@ -641,9 +641,11 @@
if (dev->eq_table.have_irq)
free_irq(dev->pdev->irq, dev);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
- if (dev->eq_table.eq[i].have_irq)
+ if (dev->eq_table.eq[i].have_irq) {
free_irq(dev->eq_table.eq[i].msi_x_vector,
dev->eq_table.eq + i);
+ dev->eq_table.eq[i].have_irq = 0;
+ }
}
static int mthca_map_reg(struct mthca_dev *dev,