diff options
| author | Joe Eykholt <jeykholt@cisco.com> | 2009-08-25 21:03:15 (GMT) |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-09-10 17:07:59 (GMT) |
| commit | 25b37b981e706c6df72c28c94f7787c3ea0cd343 (patch) | |
| tree | d1b07c6ef9fc1b659056315b4ac95de27c9d0bd9 | |
| parent | 131203a1ef53f3a4deb3260031bc53c7e4db4a24 (diff) | |
| download | linux-25b37b981e706c6df72c28c94f7787c3ea0cd343.tar.xz | |
[SCSI] libfc: fix: rport_recv_req needs disc_mutex when calling rport_lookup
The rport_lookup function must be called while holding the disc_mutex.
Otherwise, the rdata could be deleted just after that by another thread.
All callers now check the state after grabbing the rdata rp_mutex.
Even though rport_lookup skips ports in DELETE state, it does that
without holding the rdata rp_mutex, so that the state may change.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/libfc/fc_rport.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index acdc72d..02200b2 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -932,14 +932,17 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, fh = fc_frame_header_get(fp); s_id = ntoh24(fh->fh_s_id); + mutex_lock(&lport->disc.disc_mutex); rdata = lport->tt.rport_lookup(lport, s_id); if (!rdata) { + mutex_unlock(&lport->disc.disc_mutex); els_data.reason = ELS_RJT_UNAB; lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); fc_frame_free(fp); return; } mutex_lock(&rdata->rp_mutex); + mutex_unlock(&lport->disc.disc_mutex); op = fc_frame_payload_op(fp); switch (op) { |