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>
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index a762472..4c77641 100644
--- a/drivers/scsi/fcoe/fcoe_ctlr.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -1548,9 +1548,6 @@
{
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 @@
"" : "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) {