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Alan Stern fea6d607e1 [SCSI] scsi_pm: Fix bug in the SCSI power management handler 
This patch (as1520) fixes a bug in the SCSI layer's power management
implementation.

LUN scanning can be carried out asynchronously in do_scan_async(), and
sd uses an asynchronous thread for the time-consuming parts of disk
probing in sd_probe_async().  Currently nothing coordinates these
async threads with system sleep transitions; they can and do attempt
to continue scanning/probing SCSI devices even after the host adapter
has been suspended.  As one might expect, the outcome is not ideal.

This is what the "prepare" stage of system suspend was created for.
After the prepare callback has been called for a host, target, or
device, drivers are not allowed to register any children underneath
them.  Currently the SCSI prepare callback is not implemented; this
patch rectifies that omission.

For SCSI hosts, the prepare routine calls scsi_complete_async_scans()
to wait until async scanning is finished.  It might be slightly more
efficient to wait only until the host in question has been scanned,
but there's currently no way to do that.  Besides, during a sleep
transition we will ultimately have to wait until all the host scanning
has finished anyway.

For SCSI devices, the prepare routine calls async_synchronize_full()
to wait until sd probing is finished.  The routine does nothing for
SCSI targets, because asynchronous target scanning is done only as
part of host scanning.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-18 08:54:19 -06:00
..
aacraid drivers/scsi/aacraid/commctrl.c: fix mem leak in aac_send_raw_srb() 2012-01-08 14:15:21 -08:00
aic7xxx treewide: Fix typos in various parts of the kernel, and fix some comments. 2011-12-02 14:57:31 +01:00
aic7xxx_old Fix common misspellings 2011-03-31 11:26:23 -03:00
aic94xx Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
arcmsr [SCSI] arcmsr: simplify assumptions in dma_alloc_coherent() 2011-05-01 16:32:23 -05:00
arm Fix common misspellings 2011-03-31 11:26:23 -03:00
be2iscsi SCSI updates for post 3.2 merge window 2012-01-10 10:36:08 -08:00
bfa [SCSI] bfa: Implement LUN Masking feature using the SCSI Slave Callouts. 2012-01-10 17:01:24 -06:00
bnx2fc [SCSI] bnx2fc: Bumped version to 1.0.9 2011-10-30 14:05:52 +04:00
bnx2i switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
cxgbi [SCSI] libcxgbi: do not print a message when memory allocation fails 2012-01-10 17:01:21 -06:00
device_handler [SCSI] scsi_dh_alua: Retry the check-condition in case Mode Parameters Changed 2012-01-10 17:01:24 -06:00
dpt atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
fcoe [SCSI] fcoe: Move fcoe_debug_logging from fcoe.h to fcoe.c 2012-01-16 12:46:31 +04:00
fnic [SCSI] fnic: fix incorrect use of SLAB_CACHE_DMA flag 2011-06-29 16:05:41 -05:00
ibmvscsi [SCSI] ibmvfc: Fix Virtual I/O failover hang 2011-06-29 12:08:39 -05:00
isci [SCSI] isci: Fix NULL ptr dereference when no firmware is being loaded 2012-02-18 08:37:00 -06:00
libfc [SCSI] libfc: remove redundant timer init for fcp 2012-01-16 12:47:18 +04:00
libsas scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00
lpfc [SCSI] lpfc 8.3.28: Update driver version to 8.3.28 2011-12-15 10:57:45 +04:00
megaraid [SCSI] megaraid_sas: Version and Changelog update 2012-01-16 11:28:33 +04:00
mpt2sas [SCSI] mpt2sas: Fix mismatch in mpt2sas_base_hard_reset_handler() mutex lock-unlock 2012-02-12 19:39:28 -06:00
mvsas [SCSI] mv_sas: OCZ RevoDrive3 & zDrive R4 support 2011-10-31 13:29:01 +04:00
osd scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
pcmcia module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pm8001 [SCSI] isci: export phy events via ->lldd_control_phy() 2011-10-02 13:24:26 -05:00
qla2xxx [SCSI] qla2xxx: Update version number to 8.03.07.13-k. 2012-02-18 08:50:20 -06:00
qla4xxx [SCSI] qla4xxx: Update driver version to 5.02.00-k12 2012-01-16 12:36:13 +04:00
sym53c8xx_2 [SCSI] sym53c8xx: Fix NULL pointer dereference in slave_destroy 2012-01-10 17:01:18 -06:00
.gitignore
3w-9xxx.c [SCSI] 3w-9xxx: fix iommu_iova leak 2011-09-26 09:28:58 -05:00
3w-9xxx.h Fix common misspellings 2011-03-31 11:26:23 -03:00
3w-sas.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
3w-sas.h
3w-xxxx.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
3w-xxxx.h Fix common misspellings 2011-03-31 11:26:23 -03:00
53c700.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
53c700.h
53c700.scr Fix common misspellings 2011-03-31 11:26:23 -03:00
53c700_d.h_shipped Fix common misspellings 2011-03-31 11:26:23 -03:00
a100u2w.c Merge branch 'master' into for-next 2010-12-22 18:57:02 +01:00
a100u2w.h
a2091.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
a2091.h
a3000.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
a3000.h
a4000t.c
advansys.c Fix common misspellings 2011-03-31 11:26:23 -03:00
aha152x.c [SCSI] aha152x: add missing ISA PNP IDs 2011-06-29 15:09:11 -05:00
aha152x.h
aha1542.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
aha1542.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aha1740.c Fix common misspellings 2011-03-31 11:26:23 -03:00
aha1740.h
aic7xxx_old.c Fix common misspellings 2011-03-31 11:26:23 -03:00
atari_NCR5380.c [SCSI] atari_NCR5380: Provide a dummy NCR5380_exit() 2011-06-29 15:11:21 -05:00
atari_scsi.c [SCSI] atari_NCR5380: Provide a dummy NCR5380_exit() 2011-06-29 15:11:21 -05:00
atari_scsi.h
atp870u.c Fix common misspellings 2011-03-31 11:26:23 -03:00
atp870u.h
BusLogic.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
BusLogic.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
bvme6000_scsi.c
ch.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
constants.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
dc395x.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
dc395x.h Fix common misspellings 2011-03-31 11:26:23 -03:00
dmx3191d.c
dpt_i2o.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
dpti.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
dtc.c
dtc.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
eata.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
eata_generic.h
eata_pio.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
eata_pio.h
esp_scsi.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
esp_scsi.h
fd_mcs.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
fdomain.c Fix common misspellings 2011-03-31 11:26:23 -03:00
fdomain.h
FlashPoint.c Fix common misspellings 2011-03-31 11:26:23 -03:00
g_NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
g_NCR5380.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
g_NCR5380_mmio.c
gdth.c [SCSI] gdth: Add missing call to gdth_ioctl_free 2010-12-31 09:50:09 -06:00
gdth.h treewide: Fix comment and string typo 'bufer' 2011-12-06 09:53:40 +01:00
gdth_ioctl.h
gdth_proc.c [SCSI] gdth: Add missing call to gdth_ioctl_free 2010-12-31 09:50:09 -06:00
gdth_proc.h
gvp11.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
gvp11.h
hosts.c [SCSI] Make scsi_free_queue() kill pending SCSI commands 2011-10-30 13:20:28 +04:00
hpsa.c [SCSI] hpsa: do not sleep in atomic context in rmmod path. 2012-01-16 09:47:24 +04:00
hpsa.h [SCSI] hpsa: detect controller lockup 2011-10-30 14:35:01 +04:00
hpsa_cmd.h [SCSI] hpsa: fix potential array overflow in hpsa_update_scsi_devices 2011-10-30 14:34:04 +04:00
hptiop.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
hptiop.h
ibmmca.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
imm.c Fix common misspellings 2011-03-31 11:26:23 -03:00
imm.h
in2000.c Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
in2000.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
initio.c Fix common misspellings 2011-03-31 11:26:23 -03:00
initio.h Fix common misspellings 2011-03-31 11:26:23 -03:00
ipr.c [SCSI] ipr: fix eeh recovery for 64-bit adapters 2012-02-18 08:33:13 -06:00
ipr.h PCI: Rework config space blocking services 2012-01-06 12:10:33 -08:00
ips.c treewide: Fix typos in various parts of the kernel, and fix some comments. 2011-12-02 14:57:31 +01:00
ips.h Fix common misspellings 2011-03-31 11:26:23 -03:00
iscsi_boot_sysfs.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
iscsi_tcp.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
iscsi_tcp.h [SCSI] iscsi_tcp: use iscsi_conn_get_addr_param libiscsi function 2011-02-24 12:41:10 -05:00
jazz_esp.c misc latin1 to utf8 conversions 2012-01-02 13:04:55 +01:00
Kconfig [SCSI] isci: update version to 1.1 2012-01-16 11:44:54 +04:00
lasi700.c
libiscsi.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
libiscsi_tcp.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
libsrp.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
mac53c94.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
mac53c94.h
mac_esp.c mac_esp: rename irq 2012-01-22 14:50:03 +01:00
mac_scsi.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2012-01-26 12:43:57 -08:00
mac_scsi.h
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
megaraid.c [SCSI] megaraid: fix sparse warnings 2012-01-16 12:28:03 +04:00
megaraid.h Fix common misspellings 2011-03-31 11:26:23 -03:00
mesh.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c [SCSI] mvumi: Add Marvell UMI driver 2011-08-27 08:36:58 -06:00
mvumi.h [SCSI] mvumi: Add Marvell UMI driver 2011-08-27 08:36:58 -06:00
ncr53c8xx.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
ncr53c8xx.h
NCR53c406a.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
NCR5380.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
nsp32.h Fix common misspellings 2011-03-31 11:26:23 -03:00
nsp32_debug.c treewide: fix a few typos in comments 2011-05-10 10:16:21 +02:00
nsp32_io.h
osst.c [SCSI] osst: fix warning 2011-05-24 13:09:41 -04:00
osst.h Fix common misspellings 2011-03-31 11:26:23 -03:00
osst_detect.h
osst_options.h
pas16.c
pas16.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
pmcraid.c SCSI, pmcraid: Fix spelling error in a pmcraid_err() call 2011-12-15 16:35:38 +01:00
pmcraid.h Remove unneeded version.h includes from drivers/scsi/ 2011-09-15 14:57:07 +02:00
ppa.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
ppa.h
ps3rom.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
qla1280.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
qla1280.h
qlogicfas.c
qlogicfas408.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
qlogicfas408.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
qlogicpti.c [SCSI] qlogicpti: fix timeout 2011-10-16 10:58:52 -05:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
scsi.h
scsi_debug.c Fix common misspellings 2011-03-31 11:26:23 -03:00
scsi_devinfo.c [SCSI] Blacklist Traxdata CDR4120 and IOMEGA Zip drive to avoid lock ups. 2011-06-29 15:08:47 -05:00
scsi_error.c [SCSI] add flag to skip the runtime PM calls on the host 2012-01-08 19:14:57 -05:00
scsi_ioctl.c
scsi_lib.c [SCSI] don't change sdev starvation list order without request dispatched 2012-01-16 11:54:04 +04:00
scsi_lib_dma.c scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00
scsi_logging.h
scsi_module.c
scsi_netlink.c Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security 2012-01-14 18:36:33 -08:00
scsi_pm.c [SCSI] scsi_pm: Fix bug in the SCSI power management handler 2012-02-18 08:54:19 -06:00
scsi_priv.h [SCSI] scsi_pm: Fix bug in the SCSI power management handler 2012-02-18 08:54:19 -06:00
scsi_proc.c scsi: fix scsi_proc new kernel-doc warning 2011-05-28 23:12:11 -07:00
scsi_sas_internal.h
scsi_scan.c [SCSI] scsi_scan: Fix 'Poison overwritten' warning caused by using freed 'shost' 2012-02-18 08:52:48 -06:00
scsi_sysctl.c
scsi_sysfs.c [SCSI] scsi: Added support for adapter and firmware reset 2011-08-27 08:36:46 -06:00
scsi_tgt_if.c scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00
scsi_tgt_lib.c [SCSI] esp, scsi_tgt_lib, fcoe: use list_move() instead of list_del()/list_add() combination 2011-05-01 10:20:10 -05:00
scsi_tgt_priv.h
scsi_trace.c [SCSI] scsi_trace: Decode UNMAP bit in WRITE SAME(10) 2011-05-24 12:38:36 -04:00
scsi_transport_api.h
scsi_transport_fc.c [SCSI] scsi_transport_fc: Clear Devloss Callback Done flag in fc_remote_port_rolechg 2012-01-16 09:37:01 +04:00
scsi_transport_fc_internal.h
scsi_transport_iscsi.c SCSI updates for post 3.2 merge window 2012-01-10 10:36:08 -08:00
scsi_transport_sas.c [SCSI] libsas: disable scanning lun > 0 on ata devices 2011-10-02 12:29:19 -05:00
scsi_transport_spi.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
scsi_transport_srp.c
scsi_transport_srp_internal.h
scsi_typedefs.h
scsi_wait_scan.c
scsicam.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
sd.c block: fail SCSI passthrough ioctls on partition devices 2012-01-14 15:07:24 -08:00
sd.h [SCSI] sd: remove arbitrary SD_MAX_DISKS namespace limit 2011-10-30 12:58:11 +04:00
sd_dif.c block: Make the integrity mapped property a bio flag 2010-10-15 15:49:20 +02:00
ses.c [SCSI] ses: requesting a fault indication 2011-06-29 12:14:25 -05:00
sg.c [SCSI] sg: convert to kstrtoul_from_user() 2012-01-16 12:17:29 +04:00
sgiwd93.c update David Miller's old email address 2011-04-06 06:19:38 -07:00
sim710.c
sni_53c710.c misc latin1 to utf8 conversions 2012-01-02 13:04:55 +01:00
sr.c [SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise 2011-07-21 14:15:58 -07:00
sr.h [SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise 2011-07-21 14:15:58 -07:00
sr_ioctl.c scsi: Fix up files implicitly depending on module.h inclusion 2011-10-31 19:31:24 -04:00
sr_vendor.c
st.c [SCSI] st: fix race in st_scsi_execute_end 2011-10-30 13:27:28 +04:00
st.h
st_options.h
stex.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
sun3_NCR5380.c [SCSI] sun3: Remove commented out merge_contiguous_buffers 2011-06-29 15:15:05 -05:00
sun3_scsi.c [SCSI] sun3: Add various missing NDEBUG* definitions 2011-06-29 15:14:54 -05:00
sun3_scsi.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
sun3_scsi_vme.c [SCSI] sun3: Add various missing NDEBUG* definitions 2011-06-29 15:14:54 -05:00
sun3x_esp.c
sun_esp.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
sym53c416.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sym53c416.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
t128.c
t128.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
tmscsim.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
tmscsim.h
u14-34f.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
ultrastor.c [SCSI] Fix Ultrastor asm snippet 2011-05-24 13:25:35 -04:00
ultrastor.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
vmw_pvscsi.c treewide: Fix typos in various parts of the kernel, and fix some comments. 2011-12-02 14:57:31 +01:00
vmw_pvscsi.h
wd33c93.c Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
wd33c93.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
wd7000.c Fix common misspellings 2011-03-31 11:26:23 -03:00
zalon.c
zorro7xx.c