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[SCSI] libfc: update mfs boundry checking

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A previous commit changed the mfs checking to ensure the new
mfs is less or equal to the mfs supported by the FCF. This
doesn't work for BRDCM cards as they set an mfs of 2048 regardless
of whether the switch returns a larger mfs.

This patch validates the new mfs against the upper and lower spec
defined boundries for a FCoE mfs.

Signed-off-by: Vasu Dev <[email protected]>
Signed-off-by: Bhanu Prakash Gollapudi <[email protected]>
Signed-off-by: Robert Love <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Vasu Dev 2012-04-06 15:52:51 -07:00 • committed by James Bottomley
commit 93f90e5186
1 changed files with 7 additions and 5 deletions
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12
drivers/scsi/libfc/fc_lport.c
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@ -1742,17 +1742,19 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
mfs = ntohs(flp->fl_csp.sp_bb_data) &
FC_SP_BB_DATA_MASK;
if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
mfs <= lport->mfs) {
lport->mfs = mfs;
fc_host_maxframe_size(lport->host) = mfs;
} else {
if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) {
FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
"lport->mfs:%hu\n", mfs, lport->mfs);
fc_lport_error(lport, fp);
goto err;
}
if (mfs <= lport->mfs) {
lport->mfs = mfs;
fc_host_maxframe_size(lport->host) = mfs;
}
csp_flags = ntohs(flp->fl_csp.sp_features);
r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);