[dpdk-dev] [PATCH 1/2] net/i40e: fix VFIO interrupt mapping in VF

[Wei Dai <wei.dai@intel.com>]

When a VF port is bound to VFIO-PIC, only miscellaneous interrupt
is mapped to VFIO vector 0 in i40evf_dev_init( ).
In ixgbevf_dev_interrupt_handler( ), if previous VFIO interrupt
mapping set in i40evf_dev_init( ) is not cleard, it will fail when
calling rte_intr_enable( ) tries to map Rx queue interrupt to other
VFIO vectors. This patch clears the VFIO interrupt mappings before
setting both miscellaneous and Rx queue interrupt mappings again
to avoid failure.

Fixes: 4b90a3ff26c5 ("i40evf: support Rx interrupt")
Cc: stable@dpdk.org

Signed-off-by: Wei Dai <wei.dai@intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 3b76c9e..567b7d0 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1432,8 +1432,9 @@ i40evf_dev_interrupt_handler(void *param)
 				   " do nothing");
 
 done:
-	i40evf_enable_irq0(hw);
+	rte_intr_disable(dev->intr_handle);
 	rte_intr_enable(dev->intr_handle);
+	i40evf_enable_irq0(hw);
 }
 
 static int
-- 
2.7.5