[Open-FCoE] [BUG] scsi/fcoe: Sleep-in-atomic bugs in fcoe driver

[Johannes Thumshirn]

According to fcoe_ctlr.c, the driver may sleep under a RCU lock,
fcoe_ctlr_disc_stop_locked (acquire the RCU lock)
fc_rport_logoff
mutex_lock --> may sleep
fcoe_ctlr_vn_disc
fc_rport_login
mutex_lock --> may sleep
fcoe_ctlr_vn_age
fc_rport_logoff
mutex_lock --> may sleep
These bugs are found by my static analysis tool and my code review.
Thanks,
Jia-Ju Bai

Thanks for the report, coincidentally I have a bug report for this as well (in
a real setup not just static analysis) and gave the reporter a patch to test.
Once it's verified I'll post it here.

Thanks,
Johannes