Merge branch 'amend-hv_netvsc-copy-packets-sent-by-hyper-v-out-of-the-receive-buffer'

Andrea Parri says:

====================
Amend "hv_netvsc: Copy packets sent by Hyper-V out of the receive buffer"

Patch #2 also addresses the Smatch complaint reported here:

   https://lkml.kernel.org/r/YBp2oVIdMe+G%2FliJ@mwanda/
====================

Link: https://lore.kernel.org/r/20210203113513.558864-1-parri.andrea@gmail.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/hyperv/netvsc.c

@@ -311,7 +311,7 @@ static int netvsc_init_buf(struct hv_device *device,
 	struct nvsp_message *init_packet;
 	unsigned int buf_size;
 	size_t map_words;
-	int ret = 0;
+	int i, ret = 0;
 
 	/* Get receive buffer area. */
 	buf_size = device_info->recv_sections * device_info->recv_section_size;
@@ -405,6 +405,16 @@ static int netvsc_init_buf(struct hv_device *device,
 		goto cleanup;
 	}
 
+	for (i = 0; i < VRSS_CHANNEL_MAX; i++) {
+		struct netvsc_channel *nvchan = &net_device->chan_table[i];
+
+		nvchan->recv_buf = kzalloc(net_device->recv_section_size, GFP_KERNEL);
+		if (nvchan->recv_buf == NULL) {
+			ret = -ENOMEM;
+			goto cleanup;
+		}
+	}
+
 	/* Setup receive completion ring.
 	 * Add 1 to the recv_section_cnt because at least one entry in a
 	 * ring buffer has to be empty.
@@ -1549,12 +1559,6 @@ struct netvsc_device *netvsc_device_add(struct hv_device *device,
 	for (i = 0; i < VRSS_CHANNEL_MAX; i++) {
 		struct netvsc_channel *nvchan = &net_device->chan_table[i];
 
-		nvchan->recv_buf = kzalloc(device_info->recv_section_size, GFP_KERNEL);
-		if (nvchan->recv_buf == NULL) {
-			ret = -ENOMEM;
-			goto cleanup2;
-		}
-
 		nvchan->channel = device->channel;
 		nvchan->net_device = net_device;
 		u64_stats_init(&nvchan->tx_stats.syncp);

drivers/net/hyperv/rndis_filter.c

@@ -465,7 +465,7 @@ void rsc_add_data(struct netvsc_channel *nvchan,
 		}
 		nvchan->rsc.pktlen = len;
 		if (hash_info != NULL) {
-			nvchan->rsc.csum_info = *csum_info;
+			nvchan->rsc.hash_info = *hash_info;
 			nvchan->rsc.ppi_flags |= NVSC_RSC_HASH_INFO;
 		} else {
 			nvchan->rsc.ppi_flags &= ~NVSC_RSC_HASH_INFO;