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b45cdbaf9f
linux/drivers/scsi
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Manoj Kumar b45cdbaf9f cxlflash: Resolve oops in wait_port_offline 
If an async error interrupt is generated, and the error requires the FC
link to be reset, it cannot be performed in the interrupt context. So a
work element is scheduled to complete the link reset in a process
context. If either an EEH event or an escalation occurs in between when
the interrupt is generated and the scheduled work is started, the MMIO
space may no longer be available. This will cause an oops in the worker
thread.

[  606.806583] NIP kthread_data+0x28/0x40
[  606.806633] LR wq_worker_sleeping+0x30/0x100
[  606.806694] Call Trace:
[  606.806721] 0x50 (unreliable)
[  606.806796] wq_worker_sleeping+0x30/0x100
[  606.806884] __schedule+0x69c/0x8a0
[  606.806959] schedule+0x44/0xc0
[  606.807034] do_exit+0x770/0xb90
[  606.807109] die+0x300/0x460
[  606.807185] bad_page_fault+0xd8/0x150
[  606.807259] handle_page_fault+0x2c/0x30
[  606.807338] wait_port_offline.constprop.12+0x60/0x130 [cxlflash]

To prevent the problem space area from being unmapped, when there is
pending work, a mapcount (using the kref mechanism) is held.  The
mapcount is released only when the work is completed.  The last
reference release is tied to the unmapping service.

Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-01-06 20:55:01 -05:00
..
aacraid aacraid: aac_release_resources() can be static 2015-11-25 22:27:30 -05:00
aic7xxx scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
aic94xx scsi: Centralise ssp frame information units 2015-11-25 22:12:50 -05:00
arcmsr arcmsr: change driver version to v1.30.00.22-20151126 2015-11-30 18:51:20 -05:00
arm scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
be2iscsi SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
bfa bfa: Update driver version to 3.2.25.0 2015-12-02 17:07:57 -05:00
bnx2fc bnx2fc: Update version number to 2.9.6. 2015-11-09 17:32:34 -08:00
bnx2i bnx2i: Fix call trace while device reset 2015-06-02 17:15:24 -07:00
csiostor scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
cxgbi drivers/scsi/cxgbi: fix build with EXTRA_CFLAGS 2015-11-09 15:11:24 -08:00
cxlflash cxlflash: Resolve oops in wait_port_offline 2016-01-06 20:55:01 -05:00
device_handler scsi_dh_alua: Remove stale variables 2015-12-07 20:11:25 -05:00
dpt
esas2r scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
fcoe scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
fnic scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
hisi_sas hisi_sas: use platform_get_irq() 2015-12-16 22:32:37 -05:00
ibmvscsi SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
isci SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
libfc libfc: Use the correct function name in kernel-doc comment. 2015-11-09 17:15:52 -08:00
libsas Merge branch 'for-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-03-24 17:08:29 -07:00
lpfc lpfc: Update version to 11.0.0.10 for upstream patch set 2015-12-21 22:08:49 -05:00
megaraid SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
mpt3sas mpt3sas: A correction in unmap_resources 2016-01-06 15:10:37 -05:00
mvsas mvsas: Add SGPIO support to Marvell 94xx 2016-01-06 15:18:49 -05:00
osd osd: fix signed char versus %02x issue 2015-12-10 13:14:56 -05:00
pcmcia scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
pm8001 SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
qla2xxx qla2xxx: Remove unavailable firmware files 2015-11-18 12:03:29 -05:00
qla4xxx SCSI misc on 20151113 2015-11-13 20:35:54 -08:00
snic SCSI misc on 20151113 2015-11-13 20:35:54 -08:00
sym53c8xx_2 scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ufs scsi: ufs: fix spelling mistake in error message 2015-11-30 20:52:33 -05:00
.gitignore
3w-9xxx.c 3w-9xxx: don't unmap bounce buffered commands 2015-10-07 10:24:48 -07:00
3w-9xxx.h 3w-9xxx: fix command completion race 2015-04-27 10:10:19 -07:00
3w-sas.c 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-sas.h 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-xxxx.c 3w-xxxx: fix command completion race 2015-04-27 10:05:55 -07:00
3w-xxxx.h 3w-xxxx: fix command completion race 2015-04-27 10:05:55 -07:00
53c700_d.h_shipped
53c700.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
53c700.h
53c700.scr
a100u2w.c scsi: a100u2w: trivial typo in printk 2015-08-07 15:03:42 +02:00
a100u2w.h
a2091.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00
a2091.h
a3000.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
a3000.h
a4000t.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
advansys.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
aha152x.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha152x.h
aha1542.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha1542.h aha1542: fix include guard and remove useless changelog 2015-04-09 18:08:31 -07:00
aha1740.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha1740.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
am53c974.c am53c974: Fix crash during modprobe 2015-04-17 10:13:56 -07:00
atari_NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
atari_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
atp870u.c atp870u: Introduce atp870_init() 2015-11-25 22:08:55 -05:00
atp870u.h atp870u: Remove scam_on from struct atp_unit 2015-11-25 22:08:52 -05:00
BusLogic.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
BusLogic.h
bvme6000_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
ch.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
constants.c scsi: Conditionally compile in constants.c 2015-01-09 15:44:31 +01:00
dc395x.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
dc395x.h
dmx3191d.c dmx3191d: Use NO_IRQ 2014-11-20 09:11:11 +01:00
dpt_i2o.c x86/vm86: Clean up vm86.h includes 2015-07-31 13:31:10 +02:00
dpti.h scsi: use 64-bit LUNs 2014-07-17 22:07:37 +02:00
dtc.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
dtc.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
eata_generic.h
eata_pio.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
eata_pio.h
eata.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
esp_scsi.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
esp_scsi.h esp_scsi: correctly detect am53c974 2014-11-24 16:13:16 +01:00
fdomain.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
fdomain.h
FlashPoint.c FlashPoint: fix build warning 2015-11-09 16:32:14 -08:00
g_NCR5380_mmio.c
g_NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
g_NCR5380.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
gdth_ioctl.h
gdth_proc.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
gdth_proc.h
gdth.c scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 2014-11-24 20:01:40 +01:00
gdth.h
gvp11.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00
gvp11.h
hosts.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
hpsa_cmd.h hpsa: Add box and bay information for enclosure devices 2016-01-06 15:10:36 -05:00
hpsa.c hpsa: Add box and bay information for enclosure devices 2016-01-06 15:10:36 -05:00
hpsa.h hpsa: Change SAS transport devices to bus 0. 2016-01-06 15:10:35 -05:00
hptiop.c hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
hptiop.h hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
imm.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
imm.h
in2000.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
in2000.h
initio.c SCSI: initio: remove duplicate module device table 2015-11-20 11:39:03 -05:00
initio.h
ipr.c SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
ipr.h ipr: Driver version 2.6.3. 2015-11-09 19:32:41 -05:00
ips.c ips: remove pointless #warning 2015-06-02 17:24:54 -07:00
ips.h
iscsi_boot_sysfs.c [SCSI] iscsi_boot_sysfs: Fix a memory leak in iscsi_boot_destroy_kset() 2014-03-15 10:19:19 -07:00
iscsi_tcp.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
iscsi_tcp.h net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
jazz_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
Kconfig hisi_sas: Add initial bare main driver 2015-11-25 22:12:51 -05:00
lasi700.c
libiscsi_tcp.c [SCSI] libiscsi: Reduce locking contention in fast path 2014-03-15 10:19:18 -07:00
libiscsi.c libiscsi: Fix iscsi_check_transport_timeouts possible infinite loop 2015-09-17 07:25:02 -07:00
mac53c94.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
mac53c94.h
mac_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mac_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
Makefile hisi_sas: Add initial bare main driver 2015-11-25 22:12:51 -05:00
megaraid.c megaraid : use dev_printk when possible 2015-08-26 07:23:04 -07:00
megaraid.h [SCSI] megaraid: simplify internal command handling 2014-03-27 08:26:31 -07:00
mesh.c powerpc: Move Power Macintosh drivers to generic byteswappers 2015-03-23 14:29:40 +11:00
mesh.h
mvme16x_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mvme147.c
mvme147.h
mvumi.c mvumi: 64bit value for seconds_since1970 2015-11-11 20:45:23 -05:00
mvumi.h
ncr53c8xx.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ncr53c8xx.h scsi: Remove CONFIG_SCSI_MULTI_LUN 2014-07-17 22:07:35 +02:00
NCR53c406a.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
NCR5380.h atari_NCR5380: Move static co-routine variables to host data 2014-11-20 09:11:20 +01:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32_debug.c
nsp32_io.h
nsp32.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
nsp32.h
osst_detect.h
osst_options.h
osst.c scsi: remove scsi_driver owner field 2014-11-24 20:01:28 +01:00
osst.h
pas16.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
pas16.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
pmcraid.c SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
pmcraid.h
ppa.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
ppa.h
ps3rom.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qla1280.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qla1280.h
qlogicfas408.c
qlogicfas408.h
qlogicfas.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qlogicpti.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi_common.c scsi: Protect against buffer possible overflow in scsi_set_sense_information 2015-07-23 22:53:05 -07:00
scsi_debug.c scsi_debug: Increase the reported optimal transfer length 2015-12-21 22:14:47 -05:00
scsi_devinfo.c SCSI: fix bug in scsi_dev_info_list matching 2015-10-27 11:09:41 +09:00
scsi_dh.c scsi_dh: move 'dh_state' sysfs attribute to generic code 2015-12-02 16:29:19 -05:00
scsi_error.c mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
scsi_ioctl.c scsi: return EAGAIN when resetting a device under EH 2014-11-12 11:16:12 +01:00
scsi_lib_dma.c
scsi_lib.c scsi: Add scsi_vpd_tpg_id() 2015-12-02 16:43:11 -05:00
scsi_logging.c scsi_logging: return void for dev_printk() functions 2015-02-04 08:00:24 -08:00
scsi_logging.h scsi: simplify scsi_log_(send|completion) 2014-11-12 11:16:05 +01:00
scsi_module.c
scsi_netlink.c net: Use netlink_ns_capable to verify the permisions of netlink messages 2014-04-24 13:44:54 -04:00
scsi_pm.c SCSI: Fix NULL pointer dereference in runtime PM 2015-08-18 08:14:14 -07:00
scsi_priv.h scsi_dh: move 'dh_state' sysfs attribute to generic code 2015-12-02 16:29:19 -05:00
scsi_proc.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
scsi_sas_internal.h
scsi_scan.c scsi: rescan VPD attributes 2015-11-30 11:23:45 -05:00
scsi_sysctl.c scsi: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
scsi_sysfs.c scsi: export 'wwid' to sysfs 2015-12-02 16:42:13 -05:00
scsi_trace.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
scsi_transport_api.h
scsi_transport_fc.c scsi_transport_fc: Introduce scsi_host_{get,put}() 2015-11-30 17:43:55 -05:00
scsi_transport_iscsi.c SCSI misc on 20150901 2015-09-02 12:22:54 -07:00
scsi_transport_sas.c scsi_transport_sas: Remove check for SAS expander when querying bay/enclosure IDs. 2015-09-06 11:13:41 -07:00
scsi_transport_spi.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
scsi_transport_srp.c IB/srp: Avoid using uninitialized variable 2015-07-14 13:20:09 -04:00
scsi_typedefs.h
scsi.c scsi: rescan VPD attributes 2015-11-30 11:23:45 -05:00
scsi.h
scsicam.c scsi: PC partition tables are little endian 2014-11-12 11:15:54 +01:00
sd_dif.c block: Consolidate static integrity profile properties 2015-10-21 14:42:38 -06:00
sd.c SCSI misc on 20151113 2015-11-13 20:35:54 -08:00
sd.h scsi: introduce sdev_prefix_printk() 2014-11-12 11:15:57 +01:00
ses.c scsi: rescan VPD attributes 2015-11-30 11:23:45 -05:00
sg.c sg: Fix double-free when drives detach during SG_IO 2015-11-02 23:51:25 -05:00
sgiwd93.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sim710.c
sni_53c710.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sr_ioctl.c sr: reduce debug noise in sr_do_ioctl 2015-01-20 19:43:24 +01:00
sr_vendor.c scsi: Implement sr_printk() 2014-07-17 22:07:39 +02:00
sr.c scsi: remove scsi_driver owner field 2014-11-24 20:01:28 +01:00
sr.h scsi: introduce sdev_prefix_printk() 2014-11-12 11:15:57 +01:00
st_options.h
st.c st: allow debug output to be enabled or disabled via sysfs 2015-11-09 17:17:27 -08:00
st.h st: Remove obsolete scsi_tape.max_pfn 2015-11-18 11:59:09 -05:00
stex.c stex: Remove use of struct timeval 2015-11-09 17:42:19 -08:00
storvsc_drv.c storvsc: Tighten up the interrupt path 2016-01-06 15:56:17 -05:00
sun3_scsi_vme.c scsi/NCR5380: merge sun3_scsi_vme.c into sun3_scsi.c 2014-05-28 12:16:28 +02:00
sun3_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
sun3_scsi.h sun3_scsi: Move macro definitions 2014-11-20 09:11:15 +01:00
sun3x_esp.c arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
sun_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sym53c416.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
sym53c416.h
t128.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
t128.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
u14-34f.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ultrastor.c
ultrastor.h
virtio_scsi.c virtio/vhost: fixes for 4.2 2015-07-23 13:07:04 -07:00
vmw_pvscsi.c VMW_PVSCSI: Fix the issue of DMA-API related warnings. 2015-12-10 12:57:04 -05:00
vmw_pvscsi.h VMW_PVSCSI: Fix the issue of DMA-API related warnings. 2015-12-10 12:57:04 -05:00
wd33c93.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
wd33c93.h
wd719x.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
wd719x.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
wd7000.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
xen-scsifront.c xen: Use correctly the Xen memory terminologies 2015-09-08 18:03:49 +01:00
zalon.c
zorro7xx.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00