From adb6f9e1a8c6af1037232b59edb11277471537ea Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Sat, 12 Jul 2014 09:48:29 -0700 Subject: Drivers: scsi: storvsc: Fix a bug in handling VMBUS protocol version Based on the negotiated VMBUS protocol version, we adjust the size of the storage protocol messages. The two sizes we currently handle are pre-win8 and post-win8. In 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 Reviewed-by: Hannes Reinecke Cc: Signed-off-by: Christoph Hellwig --- drivers/scsi/storvsc_drv.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 8f8847ef1108..7e8a64251681 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1752,19 +1752,22 @@ 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 { + switch (vmbus_proto_version) { + case VERSION_WS2008: + case 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; + break; + default: + 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; + break; } - if (dev_id->driver_data == SFC_GUID) scsi_driver.can_queue = (STORVSC_MAX_IO_REQUESTS * STORVSC_FC_MAX_TARGETS); -- cgit v1.2.3-59-g8ed1b