Hi, Does anyone encounter such a problem ? I am using QLogic driver, and created virtual port, then I disable the vport and after couple of minutes enable it, and the problem occurs. [162680.502438] qla2xxx 0000:06:00.0: LIP reset occured (f7e8). [162680.559439] qla2xxx 0000:06:00.0: LIP reset occured (f7e8). [162680.617120] qla2xxx 0000:06:00.0: LIP occured (f7e8). [162680.673733] qla2xxx 0000:06:00.0: LIP occured (f7e8). [162680.740514] scsi 105:0:0:0: Direct-Access DGC RAID 0 0219 PQ: 0 ANSI: 4 [162680.837674] sd 105:0:0:0: [sdb] 104857600 512-byte hardware sectors (53687 MB) [162680.916389] sd 105:0:0:0: [sdb] Write Protect is off [162680.971659] sd 105:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [162681.062343] sd 105:0:0:0: [sdb] 104857600 512-byte hardware sectors (53687 MB) [162681.149600] sd 105:0:0:0: [sdb] Write Protect is off [162681.209825] sd 105:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [162681.312385] sdb: unknown partition table [162681.364817] sd 105:0:0:0: [sdb] Attached SCSI disk [162681.415509] sd 105:0:0:0: Attached scsi generic sg1 type 0 [162730.503473] rport-105:0-0: blocked FC remote port time out: removing target and saving binding [162741.546042] qla2xxx 0000:06:00.0: LIP reset occured (f7e8). [162741.586043] qla2xxx 0000:06:00.0: LIP reset occured (f7e8). [162741.647440] qla2xxx 0000:06:00.0: LIP occured (f7e8). [162741.647440] qla2xxx 0000:06:00.0: LIP occured (f7e8). [162741.786047] scsi 105:0:0:0: Direct-Access DGC RAID 0 0219 PQ: 0 ANSI: 4 [162741.968429] sd 105:0:0:0: [sdb] 104857600 512-byte hardware sectors (53687 MB) [162742.103783] sd 105:0:0:0: [sdb] Write Protect is off [162742.162283] sd 105:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [162742.260735] sd 105:0:0:0: [sdb] 104857600 512-byte hardware sectors (53687 MB) [162742.344431] sd 105:0:0:0: [sdb] Write Protect is off [162742.402063] sd 105:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [162742.501536] sdb: unknown partition table [162742.546295] sd 105:0:0:0: [sdb] Attached SCSI disk [162742.609118] sd 105:0:0:0: Attached scsi generic sg1 type 0 [162742.679687] scsi 105:0:0:0: Direct-Access DGC RAID 0 0219 PQ: 0 ANSI: 4 [162742.774281] kobject_add_internal failed for 105:0:0:0 with -EEXIST, don't try to register things with the same name in the same directory. [162742.911192] Pid: 13282, comm: scsi_wq_105 Not tainted 2.6.26.2-64bit-stw-nfs #18 [162743.046691] [162743.046692] Call Trace: [162743.092000] [<ffffffff803d7af3>] kobject_add_internal+0x173/0x1c0 [162743.179138] [<ffffffff803d8054>] kobject_add+0x54/0x80 [162743.243894] [<ffffffff80231b6e>] printk+0x4e/0x60 [162743.296139] [<ffffffff805adac7>] klist_next+0x47/0xc0 [162743.371432] [<ffffffff803d7902>] kobject_get+0x12/0x20 [162743.426598] [<ffffffff80430a17>] get_device+0x17/0x30 [162743.493113] [<ffffffff8043116f>] device_add+0xbf/0x5a0 [162743.548374] [<ffffffff80474d25>] scsi_sysfs_add_sdev+0x65/0x290 [162743.630399] [<ffffffff804729e8>] scsi_probe_and_add_lun+0xa98/0xbb0 [162743.702527] [<ffffffff8047043b>] scsi_execute_req+0xab/0x100 [162743.772525] [<ffffffff804732f6>] __scsi_scan_target+0x626/0x6d0 [162743.855816] [<ffffffff80473a35>] scsi_scan_target+0x105/0x110 [162743.921864] [<ffffffffa0000e7a>] :scsi_transport_fc:fc_scsi_scan_rport+0x8a/0xa0 [162744.009466] [<ffffffffa0000df0>] :scsi_transport_fc:fc_scsi_scan_rport+0x0/0xa0 [162744.092397] [<ffffffff8024194a>] run_workqueue+0x7a/0x100 [162744.168955] [<ffffffff802422f0>] worker_thread+0x0/0x120 [162744.218978] [<ffffffff802423af>] worker_thread+0xbf/0x120 [162744.289554] [<ffffffff802454d0>] autoremove_wake_function+0x0/0x30 [162744.384142] [<ffffffff802422f0>] worker_thread+0x0/0x120 [162744.438454] [<ffffffff802450bb>] kthread+0x4b/0x80 [162744.501454] [<ffffffff8020c2b8>] child_rip+0xa/0x12 [162744.544922] [<ffffffff8057a2f0>] unix_dgram_poll+0x0/0x1c0 [162744.625061] [<ffffffff80245070>] kthread+0x0/0x80 [162744.689818] [<ffffffff8020c2ae>] child_rip+0x0/0x12 [162744.778228] [162744.788244] error 1 [162744.812583] scsi 105:0:0:0: Unexpected response from lun 0 while scanning, scan aborted ps -ef output shows: root 13123 2 0 05:56 ? 00:00:00 [scsi_eh_99] root 13128 2 0 05:56 ? 00:00:00 [qla2xxx_99_dpc] root 13129 2 0 05:56 ? 00:00:00 [scsi_wq_99] root 13131 2 0 05:56 ? 00:00:00 [fc_wq_99] root 13132 2 0 05:56 ? 00:00:00 [fc_dl_99] root 13136 2 0 05:56 ? 00:00:00 [scsi_eh_100] root 13141 2 0 05:56 ? 00:00:00 [qla2xxx_100_dpc] root 13142 2 0 05:56 ? 00:00:00 [scsi_wq_100] root 13143 2 0 05:56 ? 00:00:00 [fc_wq_100] root 13144 2 0 05:56 ? 00:00:00 [fc_dl_100] root 13146 2 0 05:56 ? 00:00:00 [scsi_eh_101] root 13149 2 0 05:56 ? 00:00:00 [qla2xxx_101_dpc] root 13150 2 0 05:56 ? 00:00:00 [scsi_wq_101] root 13152 2 0 05:56 ? 00:00:00 [fc_wq_101] root 13153 2 0 05:56 ? 00:00:00 [fc_dl_101] root 13157 2 0 05:56 ? 00:00:00 [scsi_eh_102] root 13158 2 0 05:56 ? 00:00:00 [qla2xxx_102_dpc] root 13160 2 0 05:56 ? 00:00:00 [scsi_wq_102] root 13161 2 0 05:56 ? 00:00:00 [fc_wq_102] root 13162 2 0 05:56 ? 00:00:00 [fc_dl_102] root 13281 2 0 06:04 ? 00:00:00 [scsi_eh_105] root 13282 2 0 06:04 ? 00:00:08 [scsi_wq_105] root 13859 3218 0 08:14 pts/0 00:00:00 ps -ef scsi_eh_105 and scsi_wq_105 threads stays open even after I delete this vport, and now I cannot rmmod the module because it's module use count is 1. 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