modinfo zfcp; for i in {1..1000}; do echo "Try $i"; modprobe zfcp; lsmod | grep
-q zfcp && echo ok-here; rmmod zfcp; lsmod | grep zfcp || echo ok-gone; done
filename: /lib/modules/4.4.0-15-generic/kernel/drivers/s390/scsi/zfcp.ko
license:GPL
description:FCP HBA driver
author: IBM Deutschland Entwicklung GmbH - linux...@de.ibm.com
srcversion: 342AF26FBC6A761648C34AB
alias: ccw:t1731m03dt1732dm04*
alias: ccw:t1731m03dt1732dm03*
depends:qdio,scsi_transport_fc
intree: Y
vermagic: 4.4.0-15-generic SMP mod_unload modversions
parm: queue_depth:Default queue depth for new SCSI devices (uint)
parm: dif:Enable DIF/DIX data integrity support (bool)
parm: allow_lun_scan:For NPIV, scan and attach all storage LUNs (bool)
parm: datarouter:Enable hardware data router support (default on)
(bool)
parm: no_auto_port_rescan:no automatic port_rescan (default off)
(bool)
parm: port_scan_backoff:upper limit of port scan random backoff in
msecs (default 500) (uint)
parm: port_scan_ratelimit:minimum interval between port scans in
msecs (default 6) (uint)
parm: dbfsize:number of pages for each debug feature area (default 4)
(uint)
parm: dbflevel:log level for each debug feature area (default 3,
range 0..6) (uint)
parm: device:specify initial device (charp)
Try 1
ok-here
ok-gone
Try 2
ok-here
ok-gone
[...]
you get the idea, worked until 1000.
Therefore the bug is invalid with a recent kernel
** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Invalid
** Changed in: linux (Ubuntu Xenial)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/1559784
Title:
zFCP on s390x problems on zfcp module unloading
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Released
Bug description:
Right after unloading zFCP module I got:
[ 1432.522123] sysfs group 00b5aa30 not found for kobject
'1:0:0:1073823786'
[ 1432.522138] [ cut here ]
[ 1432.522139] WARNING: at
/build/linux-RgAt0H/linux-4.3.0/fs/sysfs/group.c:224
[ 1432.522140] Modules linked in: ghash_s390(E) prng(E) aes_s390(E)
des_s390(E) des_generic(E) sha512_s390(E) sha256_s390(E) sha1_s390(E)
sha_common(E) vmur(E) qeth_l2(E) qeth(E) ccwgroup(E) dasd_eckd_mod(E)
dasd_mod(E) zfcp(E-) qdio(E) scsi_transport_fc(E)
[ 1432.522149] CPU: 2 PID: 5873 Comm: rmmod Tainted: GE
4.3.0-2-generic #11-Ubuntu
[ 1432.522151] task: 76f4a9e0 ti: ed85c000 task.ti:
ed85c000
[ 1432.522152] Krnl PSW : 0704d0018000 0036cbee
(sysfs_remove_group+0xbe/0xd0)
[ 1432.522158]R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0
EA:3
Krnl GPRS: 00c76c33 00c58e3c 0045
fb1ac7a0
[ 1432.522160]0036cbea 78d70050
78d7
[ 1432.522161]8000 f93df000 78d7e010
[ 1432.522162]ed85c000 00b5aa30 0036cbea
ed85fa78
[ 1432.522168] Krnl Code: 0036cbde: c020002bc358 larl
%r2,8e528e
0036cbe4: c0e5fff7144a brasl
%r14,24f478
#0036cbea: a7f40001 brc
15,36cbec
>0036cbee: e340f0c4 lg
%r4,192(%r15)
0036cbf4: ebaff0a4 lmg
%r10,%r15,160(%r15)
0036cbfa: 07f4 bcr 15,%r4
0036cbfc: 0707 bcr 0,%r7
0036cbfe: 0707 bcr 0,%r7
[ 1432.522177] Call Trace:
[ 1432.522179] ([<0036cbea>] sysfs_remove_group+0xba/0xd0)
[ 1432.522183] [<00575a44>] device_del+0x5c/0x268
[ 1432.522184] [<00575c90>] device_unregister+0x40/0x98
[ 1432.522186] [<004d9b0c>] bsg_unregister_queue+0x74/0xd8
[ 1432.522189] [<005aff76>] __scsi_remove_device+0xe6/0x118
[ 1432.522192] [<005adaca>] scsi_forget_host+0xca/0xf8
[ 1432.522193] [<0059fa86>] scsi_remove_host+0xbe/0x1c8
[ 1432.522200] [<03ff800496a6>] zfcp_scsi_adapter_unregister+0x9e/0xc8
[zfcp]
[ 1432.522202] [<03ff8003b55e>] zfcp_adapter_unregister+0x7e/0xc0 [zfcp]
[ 1432.522205] [<03ff8003c876>] zfcp_ccw_remove+0x28e/0x2b0 [zfcp]
[ 1432.522207] [<00604814>] ccw_device_remove+0x44/0x210
[ 1432.522209] [<0057a9fe>] __device_release_driver+0xa6/0x150
[ 1432.522211] [<0057b782>]
