ice: rearm other interrupt cause register after enabling VFs

The other interrupt cause register (OICR), global interrupt 0, is
disabled when enabling VFs to prevent handling VFLR. If the OICR is
not rearmed then the VF cannot communicate with the PF.

Rearm the OICR after enabling VFs.

Fixes: 916c7fd ("ice: Separate VF VSI initialization/creation from reset flow")
Signed-off-by: Paul Greenwalt <[email protected]>
Tested-by: Tony Brelinski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: pgreenwa

drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c

@@ -2023,6 +2023,10 @@ static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
 	if (ret)
 		goto err_unroll_sriov;
 
+	/* rearm global interrupts */
+	if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))
+		ice_irq_dynamic_ena(hw, NULL, NULL);
+
 	return 0;
 
 err_unroll_sriov: