linux/drivers/scsi/libfc
Bhanu Prakash Gollapudi c531b9b49b [SCSI] libfc: Do not let disc work cancel itself
When number of NPIV ports created are greater than the xids
allocated per pool -- for eg., creating 255 NPIV ports on a
system with nr_cpu_ids of 32, with each pool containing 128
xids -- and then generating a link event - for eg.,
shutdown/no shutdown -- on the switch port causes the hang
with the following stack trace.

Call Trace:
schedule_timeout+0x19d/0x230
wait_for_common+0xc0/0x170
__cancel_work_timer+0xcf/0x1b0
fc_disc_stop+0x16/0x30 [libfc]
fc_lport_reset_locked+0x47/0x90 [libfc]
fc_lport_enter_reset+0x67/0xe0 [libfc]
fc_lport_disc_callback+0xbc/0xe0 [libfc]
fc_disc_done+0xa8/0xf0 [libfc]
fc_disc_timeout+0x29/0x40 [libfc]
run_workqueue+0xb8/0x140
worker_thread+0x96/0x110
kthread+0x96/0xa0
child_rip+0xa/0x20

Fix is to not cancel the disc_work if discovery is already
stopped, thus allowing lport state machine to restart and try
discovery again.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Acked-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>
2010-10-25 15:11:37 -05:00
..
fc_disc.c [SCSI] libfc: Do not let disc work cancel itself 2010-10-25 15:11:37 -05:00
fc_elsct.c [SCSI] libfc: add fc_fill_reply_hdr() and fc_fill_hdr() 2010-07-28 09:06:00 -05:00
fc_exch.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-08-04 15:31:02 -07:00
fc_fcp.c [SCSI] libfc: possible race could panic system due to NULL fsp->cmd 2010-10-25 15:11:35 -05:00
fc_frame.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
fc_libfc.c [SCSI] libfc: add fc_fill_reply_hdr() and fc_fill_hdr() 2010-07-28 09:06:00 -05:00
fc_libfc.h [SCSI] libfc: add discovery-private pointer for LLD 2010-07-28 09:05:52 -05:00
fc_lport.c [SCSI] libfc: adds flogi retry in case DID is zero in RJT 2010-10-25 15:11:32 -05:00
fc_npiv.c [SCSI] libfc: Move the port_id into lport 2010-05-16 22:22:34 -04:00
fc_rport.c [SCSI] libfc: fix setting of rport dev loss 2010-10-25 15:11:29 -05:00
Makefile [SCSI] libfc: add some generic NPIV support routines to libfc 2009-12-04 12:00:56 -06:00