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authorK. Y. Srinivasan <kys@microsoft.com>2014-07-12 09:48:28 -0700
committerChristoph Hellwig <hch@lst.de>2014-07-25 17:17:03 -0400
commit8caf92d80526f3d7cc96831ec18b384ebcaccdf0 (patch)
tree2332442b14834685b3a356e5e2024a13f214d4a5 /drivers/scsi/storvsc_drv.c
parent52f9614dd8294e95d2c0929c2d4f64b077ae486f (diff)
Drivers: scsi: storvsc: Filter commands based on the storage protocol version
Going forward it is possible that some of the commands that are not currently implemented will be implemented on future Windows hosts. Even if they are not implemented, we are told the host will corrrectly handle unsupported commands (by returning appropriate return code and sense information). Make command filtering depend on the host version. 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/storvsc_drv.c')
-rw-r--r--drivers/scsi/storvsc_drv.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index cebcef7c69ac..8f8847ef1108 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1553,9 +1553,19 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
struct vmscsi_request *vm_srb;
struct stor_mem_pools *memp = scmnd->device->hostdata;
- if (!storvsc_scsi_cmd_ok(scmnd)) {
- scmnd->scsi_done(scmnd);
- return 0;
+ if (vmstor_current_major <= VMSTOR_WIN8_MAJOR) {
+ /*
+ * On legacy hosts filter unimplemented commands.
+ * Future hosts are expected to correctly handle
+ * unsupported commands. Furthermore, it is
+ * possible that some of the currently
+ * unsupported commands maybe supported in
+ * future versions of the host.
+ */
+ if (!storvsc_scsi_cmd_ok(scmnd)) {
+ scmnd->scsi_done(scmnd);
+ return 0;
+ }
}
request_size = sizeof(struct storvsc_cmd_request);