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| author | Chris Leech <cleech@redhat.com> | 2016-10-21 23:10:53 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-11-08 23:29:58 +0100 |
| commit | d5c3eb26d9ad78a2705ec675dd2399e985c5ee52 (patch) | |
| tree | df4147b0370df632c0b67e005d6aa9fb6fbcb392 /drivers/scsi/libfc | |
| parent | scsi: ufs: optimize clock gate work (diff) | |
| download | linux-d5c3eb26d9ad78a2705ec675dd2399e985c5ee52.tar.xz linux-d5c3eb26d9ad78a2705ec675dd2399e985c5ee52.zip | |
scsi: libfc: Don't have fc_exch_find log errors on a new exchange
With the error message I added in "libfc: sanity check cpu number
extracted from xid" I didn't account for the fact that fc_exch_find is
called with FC_XID_UNKNOWN at the start of a new exchange if we are the
responder.
It doesn't come up with the initiator much, but that's basically every
exchange for a target. By checking the xid for FC_XID_UNKNOWN first, we
not only prevent the erroneous error message, but skip the unnecessary
lookup attempt as well.
[mkp: applied by hand due to conflict with Hannes' libfc patch series]
Signed-off-by: Chris Leech <cleech@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/libfc')
| -rw-r--r-- | drivers/scsi/libfc/fc_exch.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index 442a6c1d5efc..42bcf7f3a0f9 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -939,6 +939,9 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid) struct fc_exch *ep = NULL; u16 cpu = xid & fc_cpu_mask; + if (xid == FC_XID_UNKNOWN) + return NULL; + if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) { pr_err("host%u: lport %6.6x: xid %d invalid CPU %d\n:", lport->host->host_no, lport->port_id, xid, cpu); |