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kernel: fix hyperv net driver for legacy hyperv 2008.

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This commit is contained in:
Arne Fitzenreiter
2015-03-29 19:46:14 +02:00
parent b63c35cae1
commit 5b3bd19f31
2 changed files with 53 additions and 0 deletions
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3
lfs/linux
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@@ -164,6 +164,9 @@ endif
# r8169 L23 patch
cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.32-r8169_disable_L23.patch
# HyperV 2008 patch
cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.x-hyperv-2008-fix.patch
ifeq "$(KCFG)" "-kirkwood"
cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.10-mv_cesa_disable_failing_hmac_sha1.patch
cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.14.22-kirkwood_legacy_boot.patch

50
src/patches/linux-3.14.x-hyperv-2008-fix.patch Normal file
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@@ -0,0 +1,50 @@
From 99d3016de4f2a29635f5382b0e9bd0e5f2151487 Mon Sep 17 00:00:00 2001
From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Sun, 9 Mar 2014 16:10:59 -0700
Subject: hyperv: Change the receive buffer size for legacy hosts
Due to a bug in the Hyper-V host verion 2008R2, we need to use a slightly smaller
receive buffer size, otherwise the buffer will not be accepted by the legacy hosts.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 7d06b49..13010b4 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -513,6 +513,7 @@ struct nvsp_message {
#define NETVSC_MTU 65536
#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */
+#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */
#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 1a0280d..daddea2 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -365,6 +365,11 @@ static int netvsc_connect_vsp(struct hv_device *device)
goto cleanup;
/* Post the big receive buffer to NetVSP */
+ if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2)
+ net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY;
+ else
+ net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
+
ret = netvsc_init_recv_buf(device);
cleanup:
@@ -898,7 +903,6 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
ndev = net_device->ndev;
/* Initialize the NetVSC channel extension */
- net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
spin_lock_init(&net_device->recv_pkt_list_lock);
INIT_LIST_HEAD(&net_device->recv_pkt_list);
--
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