Staging: hv: Move sense_buffer field

In preparation for consolidating all I/O request state,
move sense_buffer field from struct hv_storvsc_request
to struct storvsc_request_extension.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/blkvsc_drv.c

@@ -952,7 +952,7 @@ static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req,
 
 	memcpy(vm_srb->cdb, blkvsc_req->cmnd, vm_srb->cdb_length);
 
-	storvsc_req->sense_buffer = blkvsc_req->sense_buffer;
+	storvsc_req->extension.sense_buffer = blkvsc_req->sense_buffer;
 
 	ret = storvsc_drv_obj->on_io_request(blkdev->device_ctx,
 					   &blkvsc_req->request);

drivers/staging/hv/storvsc.c

@@ -314,7 +314,7 @@ static void stor_vsc_on_io_completion(struct hv_device *device,
 				    "valid - len %d\n", request_ext,
 				    vstor_packet->vm_srb.sense_info_length);
 
-			memcpy(request->sense_buffer,
+			memcpy(request->extension.sense_buffer,
 			       vstor_packet->vm_srb.sense_data,
 			       vstor_packet->vm_srb.sense_info_length);
 

drivers/staging/hv/storvsc_api.h

@@ -62,6 +62,8 @@ struct storvsc_request_extension {
 	/* Synchronize the request/response if needed */
 	struct completion wait_event;
 
+	unsigned char *sense_buffer;
+
 	struct vstor_packet vstor_packet;
 };
 
@@ -69,8 +71,6 @@ struct hv_storvsc_request {
 	u32 status;
 	u32 bytes_xfer;
 
-	unsigned char *sense_buffer;
-
 	void *context;
 
 	void (*on_io_completion)(struct hv_storvsc_request *request);

drivers/staging/hv/storvsc_drv.c

@@ -784,7 +784,7 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd,
 
 	memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length);
 
-	request->sense_buffer = scmnd->sense_buffer;
+	request->extension.sense_buffer = scmnd->sense_buffer;
 
 
 	request->data_buffer.len = scsi_bufflen(scmnd);