staging: hv: storvsc: ignore SET_WINDOW scsi command

Some commands sent by smartd will offline the device.
With this change applied, smartd sill not monitor the device anymore.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index 807c94d..e412716 100644 (file)
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -1122,6 +1122,22 @@ static void storvsc_command_completion(struct hv_storvsc_request *request)
        kmem_cache_free(host_dev->request_pool, cmd_request);
 }
 
+static bool storvsc_check_scsi_cmd(struct scsi_cmnd *scmnd)
+{
+       bool allowed = true;
+       u8 scsi_op = scmnd->cmnd[0];
+
+       switch (scsi_op) {
+               /* smartd sends this command, which will offline the device */
+               case SET_WINDOW:
+                       scmnd->result = DID_ERROR << 16;
+                       allowed = false;
+                       break;
+               default:
+                       break;
+       }
+       return allowed;
+}
 
 /*
  * storvsc_queuecommand - Initiate command processing
@@ -1141,6 +1157,10 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd,
        unsigned int sg_count = 0;
        struct vmscsi_request *vm_srb;
 
+       if (storvsc_check_scsi_cmd(scmnd) == false) {
+               done(scmnd);
+               return 0;
+       }
 
        /* If retrying, no need to prep the cmd */
        if (scmnd->host_scribble) {