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scsi: target: iscsi: cxgbit: fix max iso npdu calculation

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- rounddown CXGBIT_MAX_ISO_PAYLOAD by csk->emss before calculating
  max_iso_npdu to get max TCP payload in multiple of mss.

- call cxgbit_set_digest() before cxgbit_set_iso_npdu() to set
  csk->submode, it is used in calculating number of iso pdus.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Varun Prakash 2018-07-11 22:03:43 +05:30 committed by Martin K. Petersen
parent 943e59fe78
commit 1b350ea0c2
1 changed files with 9 additions and 7 deletions
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16
drivers/target/iscsi/cxgbit/cxgbit_target.c
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@ -652,6 +652,7 @@ static int cxgbit_set_iso_npdu(struct cxgbit_sock *csk)
struct iscsi_param *param;
u32 mrdsl, mbl;
u32 max_npdu, max_iso_npdu;
u32 max_iso_payload;
if (conn->login->leading_connection) {
param = iscsi_find_param_from_key(MAXBURSTLENGTH,
@ -670,8 +671,10 @@ static int cxgbit_set_iso_npdu(struct cxgbit_sock *csk)
mrdsl = conn_ops->MaxRecvDataSegmentLength;
max_npdu = mbl / mrdsl;
max_iso_npdu = CXGBIT_MAX_ISO_PAYLOAD /
(ISCSI_HDR_LEN + mrdsl +
max_iso_payload = rounddown(CXGBIT_MAX_ISO_PAYLOAD, csk->emss);
max_iso_npdu = max_iso_payload /
(ISCSI_HDR_LEN + mrdsl +
cxgbit_digest_len[csk->submode]);
csk->max_iso_npdu = min(max_npdu, max_iso_npdu);
@ -741,6 +744,9 @@ static int cxgbit_set_params(struct iscsi_conn *conn)
if (conn_ops->MaxRecvDataSegmentLength > cdev->mdsl)
conn_ops->MaxRecvDataSegmentLength = cdev->mdsl;
if (cxgbit_set_digest(csk))
return -1;
if (conn->login->leading_connection) {
param = iscsi_find_param_from_key(ERRORRECOVERYLEVEL,
conn->param_list);
@ -764,7 +770,7 @@ static int cxgbit_set_params(struct iscsi_conn *conn)
if (is_t5(cdev->lldi.adapter_type))
goto enable_ddp;
else
goto enable_digest;
return 0;
}
if (test_bit(CDEV_ISO_ENABLE, &cdev->flags)) {
@ -781,10 +787,6 @@ static int cxgbit_set_params(struct iscsi_conn *conn)
}
}
enable_digest:
if (cxgbit_set_digest(csk))
return -1;
return 0;
}