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| author |   K. Y. Srinivasan <kys@microsoft.com> | 2014-07-12 09:48:29 -0700 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2014-07-25 17:17:03 -0400 |
| commit | adb6f9e1a8c6af1037232b59edb11277471537ea (patch) | |
| tree | 45fe417ada211b198c71623b4608c47c96888f0b /drivers/scsi | |
| parent | Drivers: scsi: storvsc: Filter commands based on the storage protocol version (diff) | |
| download | linux-dev-adb6f9e1a8c6af1037232b59edb11277471537ea.tar.xz linux-dev-adb6f9e1a8c6af1037232b59edb11277471537ea.zip | |
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 <kys@microsoft.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 17 |
1 files changed, 10 insertions, 7 deletions
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); |