summaryrefslogtreecommitdiff
path: root/drivers/hv/hv_snapshot.c
diff options
context:
space:
mode:
authorAlex Ng <alexng@messages.microsoft.com>2017-01-28 22:37:17 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 13:05:59 +0300
commita1656454131880980bc3a5313c8bf66ef5990c91 (patch)
treeab70bf0b5d87cfcae805407b550e7afa496520b5 /drivers/hv/hv_snapshot.c
parentad6d41253bf91eabb41626683c35a712ba27a20c (diff)
downloadlinux-a1656454131880980bc3a5313c8bf66ef5990c91.tar.xz
Drivers: hv: vmbus: Use all supported IC versions to negotiate
Previously, we were assuming that each IC protocol version was tied to a specific host version. For example, some Windows 10 preview hosts only support v3 TimeSync even though driver assumes v4 is supported by all Windows 10 hosts. The guest will stop trying to negotiate even though older supported versions may still be offered by the host. Make IC version negotiation more robust by going through all versions that are supported by the guest. Fixes: 3da0401b4d0e ("Drivers: hv: utils: Fix the mapping between host version and protocol to use") Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Signed-off-by: Alex Ng <alexng@messages.microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hv_snapshot.c')
-rw-r--r--drivers/hv/hv_snapshot.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
index 4e543dbb731a..d14f10b924a0 100644
--- a/drivers/hv/hv_snapshot.c
+++ b/drivers/hv/hv_snapshot.c
@@ -31,6 +31,16 @@
#define VSS_MINOR 0
#define VSS_VERSION (VSS_MAJOR << 16 | VSS_MINOR)
+#define VSS_VER_COUNT 1
+static const int vss_versions[] = {
+ VSS_VERSION
+};
+
+#define FW_VER_COUNT 1
+static const int fw_versions[] = {
+ UTIL_FW_VERSION
+};
+
/*
* Timeout values are based on expecations from host
*/
@@ -297,7 +307,6 @@ void hv_vss_onchannelcallback(void *context)
struct icmsg_hdr *icmsghdrp;
- struct icmsg_negotiate *negop = NULL;
if (vss_transaction.state > HVUTIL_READY)
return;
@@ -310,9 +319,10 @@ void hv_vss_onchannelcallback(void *context)
sizeof(struct vmbuspipe_hdr)];
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
- vmbus_prep_negotiate_resp(icmsghdrp, negop,
- recv_buffer, UTIL_FW_VERSION,
- VSS_VERSION);
+ vmbus_prep_negotiate_resp(icmsghdrp,
+ recv_buffer, fw_versions, FW_VER_COUNT,
+ vss_versions, VSS_VER_COUNT,
+ NULL, NULL);
} else {
vss_msg = (struct hv_vss_msg *)&recv_buffer[
sizeof(struct vmbuspipe_hdr) +