qcacmn: Handle error case with HAL SRNG setup

If hal_srng_setup() fails, memory allocated for srng
is not freed resulting in a leak. Free the memory in
that case. In future, return error to caller and
assert when invalid ring ID is used during setup.

Change-Id: I6f3a7494a5c5e861652f3a38d18c220cd9a6eef2

dp/wifi3.0/dp_main.c

@@ -574,6 +574,14 @@ static int dp_srng_setup(struct dp_soc *soc, struct dp_srng *srng,
 
 	srng->hal_srng = hal_srng_setup(hal_soc, ring_type, ring_num,
 		mac_id, &ring_params);
+
+	if (!srng->hal_srng) {
+		qdf_mem_free_consistent(soc->osdev, soc->osdev->dev,
+				srng->alloc_size,
+				srng->base_vaddr_unaligned,
+				srng->base_paddr_unaligned, 0);
+	}
+
 	return 0;
 }
 

hal/wifi3.0/hal_srng.c

@@ -545,6 +545,7 @@ static int hal_get_srng_ring_id(struct hal_soc *hal, int ring_type,
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
 			"%s: ring_num exceeded maximum no. of supported rings\n",
 			__func__);
+		/* TODO: This is a programming error. Assert if this happens */
 		return -EINVAL;
 	}