[SCSI] mpt fusion: make mptsas_smp_handler update resid

This patch fixes mptsas_smp_handler to update both din_resid or
dout_resid on success. bsg can report back the residual.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/message/fusion/mptsas.c

@@ -1343,6 +1343,8 @@ static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 		smprep = (SmpPassthroughReply_t *)ioc->sas_mgmt.reply;
 		memcpy(req->sense, smprep, sizeof(*smprep));
 		req->sense_len = sizeof(*smprep);
+		req->data_len = 0;
+		rsp->data_len -= smprep->ResponseDataLength;
 	} else {
 		printk(MYIOC_s_ERR_FMT "%s: smp passthru reply failed to be returned\n",
 		    ioc->name, __FUNCTION__);