diff options
Diffstat (limited to 'drivers/hv/hv_kvp.c')
| -rw-r--r-- | drivers/hv/hv_kvp.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index ed50e9e83c61..53127209a404 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -29,6 +29,16 @@ #include <linux/hyperv.h> +/* + * Pre win8 version numbers used in ws2008 and ws 2008 r2 (win7) + */ +#define WIN7_SRV_MAJOR 3 +#define WIN7_SRV_MINOR 0 +#define WIN7_SRV_MAJOR_MINOR (WIN7_SRV_MAJOR << 16 | WIN7_SRV_MINOR) + +#define WIN8_SRV_MAJOR 4 +#define WIN8_SRV_MINOR 0 +#define WIN8_SRV_MAJOR_MINOR (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) /* * Global state maintained for transaction that is being processed. @@ -593,8 +603,19 @@ void hv_kvp_onchannelcallback(void *context) sizeof(struct vmbuspipe_hdr)]; if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { + /* + * We start with win8 version and if the host cannot + * support that we use the previous version. + */ + if (vmbus_prep_negotiate_resp(icmsghdrp, negop, + recv_buffer, UTIL_FW_MAJOR_MINOR, + WIN8_SRV_MAJOR_MINOR)) + goto done; + vmbus_prep_negotiate_resp(icmsghdrp, negop, - recv_buffer, MAX_SRV_VER, MAX_SRV_VER); + recv_buffer, UTIL_FW_MAJOR_MINOR, + WIN7_SRV_MAJOR_MINOR); + } else { kvp_msg = (struct hv_kvp_msg *)&recv_buffer[ sizeof(struct vmbuspipe_hdr) + @@ -626,6 +647,7 @@ void hv_kvp_onchannelcallback(void *context) return; } +done: icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; |