ice: Fix reset handler

Synchronize OICR IRQ when preparing for reset to avoid potential
race conditions between the reset procedure and OICR

Fixes: 4aad533 ("ice: add individual interrupt allocation")
Signed-off-by: Grzegorz Nitka <[email protected]>
Signed-off-by: Sergey Temerkhanov <[email protected]>
Reviewed-by: Przemek Kitszel <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>

Author: gnitka

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

@@ -559,6 +559,8 @@ ice_prepare_for_reset(struct ice_pf *pf, enum ice_reset_req reset_type)
 	if (test_bit(ICE_PREPARED_FOR_RESET, pf->state))
 		return;
 
+	synchronize_irq(pf->oicr_irq.virq);
+
 	ice_unplug_aux_dev(pf);
 
 	/* Notify VFs of impending reset */