octeontx2-af: Fix some memory leaks in the error handling path of 'cgx_lmac_init()'

Memory allocated before 'lmac' is stored in 'cgx->lmac_idmap[]' must be
freed explicitly. Otherwise, in case of error, it will leak.

Rename the 'err_irq' label to better describe what is done at this place in
the error handling path.

Fixes: 6f14078e ("octeontx2-af: DMAC filter support in MAC block")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/cgx.c

@@ -1487,7 +1487,7 @@ static int cgx_lmac_init(struct cgx *cgx)
 				MAX_DMAC_ENTRIES_PER_CGX / cgx->lmac_count;
 		err = rvu_alloc_bitmap(&lmac->mac_to_index_bmap);
 		if (err)
-			return err;
+			goto err_name_free;
 
 		/* Reserve first entry for default MAC address */
 		set_bit(0, lmac->mac_to_index_bmap.bmap);
@@ -1497,7 +1497,7 @@ static int cgx_lmac_init(struct cgx *cgx)
 		spin_lock_init(&lmac->event_cb_lock);
 		err = cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, false);
 		if (err)
-			goto err_irq;
+			goto err_bitmap_free;
 
 		/* Add reference */
 		cgx->lmac_idmap[lmac->lmac_id] = lmac;
@@ -1507,7 +1507,9 @@ static int cgx_lmac_init(struct cgx *cgx)
 
 	return cgx_lmac_verify_fwi_version(cgx);
 
-err_irq:
+err_bitmap_free:
+	rvu_free_bitmap(&lmac->mac_to_index_bmap);
+err_name_free:
 	kfree(lmac->name);
 err_lmac_free:
 	kfree(lmac);