idpf: remove redundant 'req_vec_chunks' NULL check

'req_vec_chunks' is used to store the vector info received
from the device control plane. The memory for it is allocated
in idpf_send_alloc_vectors_msg and returns an error if the memory
allocation fails.

'req_vec_chunks' cannot be NULL in the later code flow. So remove
the conditional check to extract the vector ids received from
the device control plane.

Smatch static checker warning:

drivers/net/ethernet/intel/idpf/idpf_lib.c:417 idpf_intr_req()
error: we previously assumed 'adapter->req_vec_chunks'
could be null (see line 360)
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/intel-wired-lan/a355ae8a-9011-4a85-a4d1-5b2793bb5f7b@stanley.mountain/Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20240814175903.4166390-1-anthony.l.nguyen@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/idpf/idpf_lib.c

@@ -357,24 +357,11 @@ int idpf_intr_req(struct idpf_adapter *adapter)
 		goto free_msix;
 	}
 
-	if (adapter->req_vec_chunks) {
-		struct virtchnl2_vector_chunks *vchunks;
-		struct virtchnl2_alloc_vectors *ac;
-
-		ac = adapter->req_vec_chunks;
-		vchunks = &ac->vchunks;
-
-		num_vec_ids = idpf_get_vec_ids(adapter, vecids, total_vecs,
-					       vchunks);
-		if (num_vec_ids < v_actual) {
-			err = -EINVAL;
-			goto free_vecids;
-		}
-	} else {
-		int i;
-
-		for (i = 0; i < v_actual; i++)
-			vecids[i] = i;
+	num_vec_ids = idpf_get_vec_ids(adapter, vecids, total_vecs,
+				       &adapter->req_vec_chunks->vchunks);
+	if (num_vec_ids < v_actual) {
+		err = -EINVAL;
+		goto free_vecids;
 	}
 
 	for (vector = 0; vector < v_actual; vector++) {