[PATCH 3/8] Drivers: scsi: storvsc: Fix a bug in handling VMBUS protocol version

K. Y. Srinivasan
2014-07-09T00:46:47Z

Based on the negotiated VMBUS protocol version, we adjust the size of the storage
protocol messages. The two sizes we currently handle or pre-win8 and post-win8.
Win WS2012 R2, we are negotiating higher VMBUS protocol version than the win8
version. Make adjustments to correctly handle this.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
---
drivers/scsi/storvsc_drv.c | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 759853c..d9d8051 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1751,19 +1751,19 @@ static int storvsc_probe(struct hv_device *device,
* set state to properly communicate with the host.
*/

- if (vmbus_proto_version == VERSION_WIN8) {
- sense_buffer_size = POST_WIN7_STORVSC_SENSE_BUFFER_SIZE;
- vmscsi_size_delta = 0;
- vmstor_current_major = VMSTOR_WIN8_MAJOR;
- vmstor_current_minor = VMSTOR_WIN8_MINOR;
- } else {
+ if ((vmbus_proto_version == VERSION_WS2008) ||
+ (vmbus_proto_version == VERSION_WIN7)) {
sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE;
vmscsi_size_delta = sizeof(struct vmscsi_win8_extension);
vmstor_current_major = VMSTOR_WIN7_MAJOR;
vmstor_current_minor = VMSTOR_WIN7_MINOR;
+ } else {
+ sense_buffer_size = POST_WIN7_STORVSC_SENSE_BUFFER_SIZE;
+ vmscsi_size_delta = 0;
+ vmstor_current_major = VMSTOR_WIN8_MAJOR;
+ vmstor_current_minor = VMSTOR_WIN8_MINOR;
}

-
host = scsi_host_alloc(&scsi_driver,
sizeof(struct hv_host_device));
if (!host)
--
1.7.4.1