bng_en: make bnge_alloc_ring() self-unwind on failure

Ensure bnge_alloc_ring() frees any intermediate allocations
when it fails. This enables later patches to rely on this
self-unwinding behavior.

Signed-off-by: Bhargava Marreddy <[email protected]>
Reviewed-by: Vikas Gupta <[email protected]>
Reviewed-by: Rajashekar Hudumula <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: bmarreddy

drivers/net/ethernet/broadcom/bnge/bnge_rmem.c

@@ -95,7 +95,7 @@ int bnge_alloc_ring(struct bnge_dev *bd, struct bnge_ring_mem_info *rmem)
 						     &rmem->dma_arr[i],
 						     GFP_KERNEL);
 		if (!rmem->pg_arr[i])
-			return -ENOMEM;
+			goto err_free_ring;
 
 		if (rmem->ctx_mem)
 			bnge_init_ctx_mem(rmem->ctx_mem, rmem->pg_arr[i],
@@ -116,10 +116,13 @@ int bnge_alloc_ring(struct bnge_dev *bd, struct bnge_ring_mem_info *rmem)
 	if (rmem->vmem_size) {
 		*rmem->vmem = vzalloc(rmem->vmem_size);
 		if (!(*rmem->vmem))
-			return -ENOMEM;
+			goto err_free_ring;
 	}
-
 	return 0;
+
+err_free_ring:
+	bnge_free_ring(bd, rmem);
+	return -ENOMEM;
 }
 
 static int bnge_alloc_ctx_one_lvl(struct bnge_dev *bd,