net/iavf: enable PCI bus master after reset

[dpdk.git] / drivers / net / iavf / iavf_ethdev.c

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index d688c31..a7ef7a6 100644 (file)
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -2356,7 +2356,15 @@ iavf_dev_close(struct rte_eth_dev *dev)
        rte_free(vf->aq_resp);
        vf->aq_resp = NULL;
 
-       vf->vf_reset = false;
+       /*
+        * If the VF is reset via VFLR, the device will be knocked out of bus
+        * master mode, and the driver will fail to recover from the reset. Fix
+        * this by enabling bus mastering after every reset. In a non-VFLR case,
+        * the bus master bit will not be disabled, and this call will have no
+        * effect.
+        */
+       if (vf->vf_reset && !rte_pci_set_bus_master(pci_dev, true))
+               vf->vf_reset = false;
 
        return ret;
 }