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6229b414b3
linux/drivers/scsi
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Nagarajkumar Narayanan 6229b414b3 mpt2sas: setpci reset kernel oops fix 
mpt2sas: setpci reset on nytro warpdrive card along with sysfs access and
cli ioctl access resulted in kernel oops

1. pci_access_mutex lock added to provide synchronization between IOCTL,
   sysfs, PCI resource handling path

2. gioc_lock spinlock to protect list operations over multiple
controllers

>From c53a1cff4c07528b8b9ec7f6716e94950283e8f9 Mon Sep 17 00:00:00 2001
From: Nagarajkumar Narayanan <nagarajkumar.narayanan@seagate.com>
Date: Tue, 18 Aug 2015 11:58:13 +0530
Subject: [PATCH] mpt2sas setpci reset oops fix

In mpt2sas driver due to lack of synchronization between ioctl,
BRM status access through sysfs, pci resource removal kernel oops
happen as ioctl path and BRM status sysfs access path still tries
to access the removed resources

Two locks added to provide syncrhonization

1. pci_access_mutex: Mutex to synchronize ioctl,sysfs show path and
pci resource handling. PCI resource freeing will lead to free
vital hardware/memory resource, which might be in use by cli/sysfs
path functions resulting in Null pointer reference followed by kernel
crash. To avoid the above race condition we use mutex syncrhonization
which ensures the syncrhonization between cli/sysfs_show path

Note: pci_access_mutex is used only if nytro warpdrive cards
(ioc->is_warpdrive based on device id) are used
as we could not test this case with other SAS2 HBA cards
We can remove this check if this behaviour confirmed from other
cards.

2. spinlock on list operations over IOCs

Case: when multiple warpdrive cards(IOCs) are in use
Each IOC will added to the ioc list stucture on initialization.
Watchdog threads run at regular intervals to check IOC for any
fault conditions which will trigger the dead_ioc thread to
deallocate pci resource, resulting deleting the IOC netry from list,
this deletion need to protected by spinlock to enusre that
ioc removal is syncrhonized, if not synchronized it might lead to
list_del corruption as the ioc list is traversed in cli path

Signed-off-by: Nagarajkumar Narayanan <nagarajkumar.narayanan@seagate.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Sreekanth Reddy <sreekanth.reddy@avagotech.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-09-06 11:57:25 -07:00
..
aacraid aacraid: aac_src_intr_message() can be static 2015-05-25 08:46:25 -07:00
aic7xxx aic7xxx: replace kmalloc/memset by kzalloc 2015-04-09 13:22:10 -07:00
aic94xx aic94xx: Skip reading user settings if flash is not found 2015-08-28 13:14:54 -07:00
arcmsr scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
arm scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
be2iscsi be2iscsi : Bump the driver version 2015-05-25 08:57:53 -07:00
bfa bfa: Fix incorrect de-reference of pointer 2015-09-06 11:39:53 -07:00
bnx2fc Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-18 05:56:29 -08:00
bnx2i bnx2i: Fix call trace while device reset 2015-06-02 17:15:24 -07:00
csiostor csiostor: fix an error code in csio_hw_init() 2015-05-25 08:46:26 -07:00
cxgbi libcxgbi: use kvfree() in cxgbi_free_big_mem() 2015-06-30 19:45:00 -07:00
cxlflash cxlflash: Remove unused variable from queuecommand 2015-08-26 18:08:47 -07:00
device_handler scsi_dh: kill struct scsi_dh_data 2015-08-28 13:14:57 -07:00
dpt
esas2r SCSI misc on 20150209 2015-02-11 10:28:45 -08:00
fcoe Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-18 05:56:29 -08:00
fnic x86/mm: Decouple <linux/vmalloc.h> from <asm/io.h> 2015-06-03 12:02:00 +02:00
ibmvscsi IB/srp: Add 64-bit LUN support 2015-05-18 13:35:56 -04:00
isci scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
libfc libfc: Fix a typo in a source code comment 2015-08-12 11:21:43 -07:00
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: Fix possible use-after-free and double free in lpfc_mbx_cmpl_rdp_page_a2() 2015-09-06 11:51:39 -07:00
megaraid megaraid_sas: fix whitespace errors 2015-08-26 07:36:51 -07:00
mpt2sas mpt2sas: setpci reset kernel oops fix 2015-09-06 11:57:25 -07:00
mpt3sas mpt3sas : Bump mpt3sas driver version to 9.100.00.00 2015-08-27 11:08:31 -07:00
mvsas mvsas: always iounmap resources 2015-08-12 11:18:47 -07:00
osd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
pcmcia scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
pm8001 pm80xx: Don't override ts->stat on IO_OPEN_CNX_ERROR_HW_RESOURCE_BUSY 2015-09-06 11:53:31 -07:00
qla2xxx qla2xxx: Update driver version to 8.07.00.26-k 2015-08-26 17:51:01 -07:00
qla4xxx Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-06-24 16:49:49 -07:00
snic snic: driver for Cisco SCSI HBA 2015-06-19 16:57:51 -07:00
sym53c8xx_2 scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ufs SCSI misc on 20150622 2015-06-23 15:55:44 -07:00
.gitignore
3w-9xxx.c 3w-9xxx: fix command completion race 2015-04-27 10:10:19 -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: remove scsi_set_tag_type 2014-12-04 09:57:13 +01:00
53c700.h
53c700.scr
a100u2w.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c advansys: fix compilation errors and warnings when CONFIG_PCI is not set 2015-06-13 08:42:36 -07:00
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 scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
atp870u.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
BusLogic.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
BusLogic.h
bvme6000_scsi.c
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 scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
dpti.h
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 esp_scsi: remove check for ESP_MAX_TAGS 2015-01-09 15:44:23 +01:00
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
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
gvp11.h
hosts.c scsi: remove ordered_tag host template field 2014-11-12 11:19:41 +01:00
hpsa_cmd.h hpsa: add in new offline mode 2015-08-26 16:28:48 -07:00
hpsa.c hpsa: fix rmmod issues 2015-08-26 16:29:49 -07:00
hpsa.h Change how controllers in mixed mode are handled. 2015-08-26 16:28:15 -07:00
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: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
initio.h
ipr.c ipr: Enable SIS pipe commands for SIS-32 devices. 2015-08-28 13:14:53 -07:00
ipr.h ipr: Driver version 2.6.2 2015-07-30 12:41:47 -07:00
ips.c ips: remove pointless #warning 2015-06-02 17:24:54 -07:00
ips.h
iscsi_boot_sysfs.c
iscsi_tcp.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
iscsi_tcp.h
jazz_esp.c
Kconfig cxlflash: Base support for IBM CXL Flash Adapter 2015-07-30 21:02:01 -07:00
lasi700.c
libiscsi_tcp.c
libiscsi.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
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
mac_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
Makefile scsi_dh: integrate into the core SCSI code 2015-08-28 13:14:56 -07:00
megaraid.c megaraid : use dev_printk when possible 2015-08-26 07:23:04 -07:00
megaraid.h
mesh.c powerpc: Move Power Macintosh drivers to generic byteswappers 2015-03-23 14:29:40 +11:00
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c
mvumi.h
ncr53c8xx.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ncr53c8xx.h
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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-02-10 20:01:30 -08:00
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 Move code that is used both by initiator and target drivers 2015-06-01 07:32:43 -07:00
scsi_debug.c scsi_debug: resp_request: remove unused variable 2015-09-06 11:03:14 -07:00
scsi_devinfo.c SCSI: add 1024 max sectors black list flag 2015-04-27 09:38:06 -07:00
scsi_dh.c scsi_dh: return SCSI_DH_NOTCONN in scsi_dh_activate() 2015-08-28 13:14:58 -07:00
scsi_error.c scsi_dh: kill struct scsi_dh_data 2015-08-28 13:14:57 -07:00
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_dh: kill struct scsi_dh_data 2015-08-28 13:14:57 -07:00
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
scsi_pm.c SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM 2014-12-15 15:11:06 +01:00
scsi_priv.h scsi_dh: integrate into the core SCSI code 2015-08-28 13:14:56 -07:00
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 Move code that is used both by initiator and target drivers 2015-06-01 07:32:43 -07:00
scsi_sysctl.c
scsi_sysfs.c scsi_dh: integrate into the core SCSI code 2015-08-28 13:14:56 -07:00
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: Add support for 25Gbit speed 2015-04-10 07:40:32 -07:00
scsi_transport_iscsi.c iSCSI: let session recovery_tmo sysfs writes persist across recovery 2015-07-30 12:43:00 -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: remove MSG_*_TAG defines 2014-12-04 09:58:33 +01:00
scsi_transport_srp.c scsi_transport_srp: Reduce failover time 2015-05-18 13:35:55 -04:00
scsi_typedefs.h
scsi.c Move code that is used both by initiator and target drivers 2015-06-01 07:32:43 -07:00
scsi.h
scsicam.c
sd_dif.c sd: Fix missing ATO tag check 2015-04-16 10:37:12 -07:00
sd.c sd: fix an error return in probe() 2015-05-25 08:46:24 -07:00
sd.h
ses.c ses: Add power_status to SES device slot 2015-01-09 15:44:19 +01:00
sg.c sg_start_req(): use import_iovec() 2015-04-11 22:27:14 -04:00
sgiwd93.c
sim710.c
sni_53c710.c
sr_ioctl.c sr: reduce debug noise in sr_do_ioctl 2015-01-20 19:43:24 +01:00
sr_vendor.c
sr.c scsi: remove scsi_driver owner field 2014-11-24 20:01:28 +01:00
sr.h
st_options.h
st.c st: Destroy st_index_idr on module exit 2015-08-26 07:45:25 -07:00
st.h st: implement tape statistics 2015-06-02 08:03:25 -07:00
stex.c scsi: don't force tagged_supported in drivers 2014-11-12 11:19:44 +01:00
storvsc_drv.c storvsc: Set the error code correctly in failure conditions 2015-08-26 22:41:36 -07:00
sun3_scsi_vme.c
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
sun_esp.c
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_scsi: don't select CONFIG_BLK_DEV_INTEGRITY 2015-05-25 09:14:47 -07:00
vmw_pvscsi.c vmw_pscsi: simplify ->change_queue_depth 2014-11-24 14:45:28 +01:00
vmw_pvscsi.h
wd33c93.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
wd33c93.h
wd719x.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
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 xenbus_client: Extend interface to support multi-page ring 2015-04-15 10:56:47 +01:00
zalon.c
zorro7xx.c