[PATCH] set data direction in sd_synchronize_cache in sd.c

Hi,

the following patch sets the data direction in sd_synchronize_cache
to SCSI_DATA_NONE. Otherwise the data direction would be
SCSI_DATA_UNKNOWN, which is at least a problem for the zfcp
lldd, since it expects a value differently from unknown.
Please apply, thanks.

Heiko

drivers/scsi/sd.c

@@ -1506,6 +1506,7 @@ static int sd_synchronize_cache(struct scsi_disk *sdkp, int verbose)
 		return 0;
 	}
 
+	SRpnt->sr_data_direction = SCSI_DATA_NONE;
 
 	for(retries = 3; retries > 0; --retries) {
 		unsigned char cmd[10] = { 0 };