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| author | Krishna Mohan <krmohan@cisco.com> | 2013-03-01 11:35:31 +0000 |
|---|---|---|
| committer | Robert Love <robert.w.love@intel.com> | 2013-05-10 10:19:19 -0700 |
| commit | e6c10b7c5e0e7c6ecf7d60f502c7eeaf3361b48f (patch) | |
| tree | 16930a7bcdff2a234cf52ad07a8c1cf1c22d2230 /drivers/scsi | |
| parent | c1be5a5b1b355d40e6cf79cc979eb66dafa24ad1 (diff) | |
| download | linux-stable-e6c10b7c5e0e7c6ecf7d60f502c7eeaf3361b48f.tar.gz linux-stable-e6c10b7c5e0e7c6ecf7d60f502c7eeaf3361b48f.tar.bz2 linux-stable-e6c10b7c5e0e7c6ecf7d60f502c7eeaf3361b48f.zip | |
libfcoe: Fix Conflicting FCFs issue in the fabric
When multiple FCFs in use, and first FIP Advertisement received is
with "Available for Login" i.e A bit set to 0, FCF selection will fail.
The fix is to remove the assumption in the code that first FCF is only
allowed selectable FCF.
Consider the scenario fip->fcfs contains FCF1(fabricname X, marked A=0)
FCF2(fabricname Y, marked A=1). list_first_entry(first) points to FCF1
and 1st iteration we ignore the FCF and on 2nd iteration we compare
FCF1 & FCF2 fabric name and we fails to perform FCF selection.
Signed-off-by: Krishna Mohan <krmohan@cisco.com>
Reviewed-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/fcoe/fcoe_ctlr.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index a76247201be5..4c7764181b79 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -1548,9 +1548,6 @@ static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) { struct fcoe_fcf *fcf; struct fcoe_fcf *best = fip->sel_fcf; - struct fcoe_fcf *first; - - first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list); list_for_each_entry(fcf, &fip->fcfs, list) { LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " @@ -1568,17 +1565,15 @@ static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) "" : "un"); continue; } - if (fcf->fabric_name != first->fabric_name || - fcf->vfid != first->vfid || - fcf->fc_map != first->fc_map) { + if (!best || fcf->pri < best->pri || best->flogi_sent) + best = fcf; + if (fcf->fabric_name != best->fabric_name || + fcf->vfid != best->vfid || + fcf->fc_map != best->fc_map) { LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " "or FC-MAP\n"); return NULL; } - if (fcf->flogi_sent) - continue; - if (!best || fcf->pri < best->pri || best->flogi_sent) - best = fcf; } fip->sel_fcf = best; if (best) { |