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Ming Lei 6280db912e scsi: core: Don't start concurrent async scan on same host 
[ Upstream commit 831e3405c2a344018a18fcc2665acc5a38c3a707 ]

The current scanning mechanism is supposed to fall back to a synchronous
host scan if an asynchronous scan is in progress. However, this rule isn't
strictly respected, scsi_prep_async_scan() doesn't hold scan_mutex when
checking shost->async_scan. When scsi_scan_host() is called concurrently,
two async scans on same host can be started and a hang in do_scan_async()
is observed.

Fixes this issue by checking & setting shost->async_scan atomically with
shost->scan_mutex.

Link: https://lore.kernel.org/r/20201010032539.426615-1-ming.lei@redhat.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-10 12:35:59 +01:00
..
aacraid
scsi: aacraid: Fix error handling paths in aac_probe_one()
2020-10-01 13:14:42 +02:00
aic7xxx
scsi: aic7xxx: Adjust indentation in ahc_find_syncrate
2020-02-24 08:34:43 +01:00
aic94xx
scsi: aic94xx: fix module loading
2019-02-12 19:47:25 +01:00
arcmsr
scsi: arcmsr: clean up clang warning on extraneous parentheses
2019-11-24 08:20:59 +01:00
arm
scsi: eesox: Fix different dev_id between request_irq() and free_irq()
2020-08-19 08:14:55 +02:00
be2iscsi
scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()
2020-10-29 09:55:14 +01:00
bfa
scsi: bfa: release allocated memory in case of error
2020-01-14 20:07:06 +01:00
bnx2fc
scsi: bnx2fc: fix incorrect cast to u64 on shift operation
2019-06-19 08:18:03 +02:00
bnx2i
scsi: bnx2i: fix potential use after free
2020-01-23 08:21:38 +01:00
csiostor
scsi: csiostor: Fix wrong return value in csio_hw_prep_fw()
2020-10-29 09:55:07 +01:00
cxgbi
scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy()
2020-01-17 19:47:14 +01:00
cxlflash
scsi: cxlflash: Fix error return code in cxlflash_probe()
2020-10-01 13:14:45 +02:00
device_handler
scsi: scsi_dh_alua: handle RTPG sense code correctly during state transitions
2019-11-10 11:27:20 +01:00
dpt
…
esas2r
scsi: esas2r: unlock on error in esas2r_nvram_read_direct()
2020-01-23 08:21:38 +01:00
fcoe
scsi: fcoe: Memory leak fix in fcoe_sysfs_fcf_del()
2020-09-03 11:24:22 +02:00
fnic
scsi: fnic: fix use after free
2020-10-01 13:14:26 +02:00
hisi_sas
scsi: hisi_sas: Check sas_port before using it
2020-06-07 13:17:55 +02:00
ibmvscsi
scsi: ibmvfc: Fix error return in ibmvfc_probe()
2020-10-30 10:38:30 +01:00
ibmvscsi_tgt
scsi: ibmvscsis: Ensure partition name is properly NUL terminated
2018-09-17 02:50:37 -04:00
isci
scsi: isci: Change sci_controller_start_task's return type to sci_status
2019-12-01 09:16:28 +01:00
libfc
scsi: libfc: Skip additional kref updating work event
2020-10-01 13:14:48 +02:00
libsas
scsi: libsas: Set data_dir as DMA_NONE if libata marks qc as NODATA
2020-09-17 13:45:23 +02:00
lpfc
scsi: lpfc: Fix coverity errors in fmdi attribute handling
2020-10-01 13:14:33 +02:00
megaraid
scsi: megaraid_sas: TM command refire leads to controller firmware crash
2020-06-22 09:05:07 +02:00
mpt3sas
scsi: mpt3sas: Fix double free warnings
2020-06-25 15:32:55 +02:00
mvsas
scsi: mvsas: fix wrong endianness of sgpio api
2018-03-01 21:07:48 -05:00
osd
osd: Convert to new IDA API
2018-08-21 23:54:17 -04:00
pcmcia
scsi: remove the fdomain and fdomain_cs drivers
2018-03-19 22:54:47 -04:00
pm8001
scsi: pm80xx: Cleanup command when a reset times out
2020-10-01 13:14:28 +02:00
qedf
scsi: qedf: Fix crash when MFW calls for protocol stats while function is still probing
2020-06-25 15:32:53 +02:00
qedi
scsi: qedi: Fix list_del corruption while removing active I/O
2020-10-30 10:38:31 +01:00
qla2xxx
scsi: qla2xxx: Fix crash on session cleanup with unload
2020-11-05 11:08:47 +01:00
qla4xxx
scsi: qla4xxx: Fix an error handling path in 'qla4xxx_get_host_stats()'
2020-10-29 09:55:07 +01:00
smartpqi
scsi: smartpqi: fix call trace in device discovery
2020-04-29 16:31:16 +02:00
snic
scsi: snic: fix printing time intervals
2018-07-12 23:01:16 -04:00
sym53c8xx_2
scsi: sym53c8xx: fix NULL pointer dereference panic in sym_int_sir()
2019-11-20 18:46:29 +01:00
ufs
scsi: ufs: ufs-qcom: Fix race conditions caused by ufs_qcom_testbus_config()
2020-10-30 10:38:32 +01:00
.gitignore
scsi: scsi_devinfo: Add scsi_devinfo_tbl.c
2017-10-25 05:40:22 -04:00
3w-9xxx.c
scsi: 3ware: fix return 0 on the error path of probe
2018-07-30 23:17:53 -04:00
3w-9xxx.h
scsi: 3w-9xxx: rework lock timeouts
2017-12-04 20:32:53 -05:00
3w-sas.c
scsi: 3ware: fix return 0 on the error path of probe
2018-07-30 23:17:53 -04:00
3w-sas.h
…
3w-xxxx.c
scsi: 3ware: fix return 0 on the error path of probe
2018-07-30 23:17:53 -04:00
3w-xxxx.h
…
53c700_d.h_shipped
…
53c700.c
scsi: 53c700: pass correct "dev" to dma_alloc_attrs()
2019-03-13 14:02:31 -07:00
53c700.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
53c700.scr
…
a100u2w.c
scsi: a100u2w: Replace mdelay() with msleep()
2018-07-30 23:17:53 -04:00
a100u2w.h
…
a2091.c
scsi: drop bus reset for wd33c93-compatible boards
2017-08-25 17:21:10 -04:00
a2091.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
a3000.c
scsi: drop bus reset for wd33c93-compatible boards
2017-08-25 17:21:10 -04:00
a3000.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
a4000t.c
…
advansys.c
scsi: read host_busy via scsi_host_busy()
2018-06-26 12:53:26 -04:00
aha152x.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
aha152x.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
aha1542.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
aha1542.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
aha1740.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
aha1740.h
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
am53c974.c
scsi: am53c974: Use module_pci_driver
2018-05-01 23:29:41 -04:00
atari_scsi.c
scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE
2020-01-04 19:12:56 +01:00
atp870u.c
scsi: atp870u: Replace mdelay() with msleep()
2018-07-30 23:17:53 -04:00
atp870u.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
BusLogic.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
BusLogic.h
…
bvme6000_scsi.c
…
ch.c
scsi: ch: Make it possible to open a ch device multiple times again
2019-10-29 09:19:50 +01:00
constants.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dc395x.c
scsi: dc395x: fix DMA API usage in sg_update_list
2019-12-01 09:16:32 +01:00
dc395x.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dmx3191d.c
scsi: NCR5380: Move bus reset to host reset
2017-08-25 17:21:11 -04:00
dpt_i2o.c
scsi: dpt_i2o: Remove VLA usage
2018-05-18 12:03:51 -04:00
dpti.h
scsi: dpt_i2o: stop using scsi_unregister
2018-03-15 00:25:37 -04:00
esp_scsi.c
scsi: esp_scsi: Track residual for PIO transfers
2018-11-13 11:08:32 -08:00
esp_scsi.h
scsi: esp_scsi: Track residual for PIO transfers
2018-11-13 11:08:32 -08:00
FlashPoint.c
…
g_NCR5380.c
scsi: NCR5380: Move bus reset to host reset
2017-08-25 17:21:11 -04:00
gdth_ioctl.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gdth_proc.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
gdth_proc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gdth.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
gdth.h
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
gvp11.c
scsi: drop bus reset for wd33c93-compatible boards
2017-08-25 17:21:10 -04:00
gvp11.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hosts.c
Revert "scsi: core: avoid host-wide host_busy counter for scsi_mq"
2018-08-27 13:17:00 -04:00
hpsa_cmd.h
scsi: hpsa: correct ioaccel2 chaining
2019-07-10 09:53:37 +02:00
hpsa.c
scsi: hpsa: correct race condition in offload enabled
2020-10-01 13:14:40 +02:00
hpsa.h
scsi: hpsa: correct enclosure sas address
2018-07-10 22:25:03 -04:00
hptiop.c
scsi: hptiop: Simplify reset handling
2017-08-25 17:21:10 -04:00
hptiop.h
…
imm.c
scsi: don't add scsi command result bytes
2018-06-26 12:27:07 -04:00
imm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
initio.c
…
initio.h
…
ipr.c
scsi: ipr: Fix softlockup when rescanning devices in petitboot
2020-04-02 15:28:15 +02:00
ipr.h
scsi: ipr: Fix softlockup when rescanning devices in petitboot
2020-04-02 15:28:15 +02:00
ips.c
scsi: ips: fix missing break in switch
2019-12-01 09:16:26 +01:00
ips.h
scsi: ips: fix firmware timestamps for 32-bit
2018-04-20 19:40:17 -04:00
iscsi_boot_sysfs.c
scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj
2020-06-25 15:33:01 +02:00
iscsi_tcp.c
scsi: iscsi: Don't destroy session if there are outstanding connections
2020-02-24 08:34:48 +01:00
iscsi_tcp.h
…
jazz_esp.c
scsi: jazz_esp, sun3x_esp: Pass struct device pointer in dma calls
2018-03-12 22:05:43 -04:00
Kconfig
scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled
2020-07-22 09:32:04 +02:00
lasi700.c
parisc/scsi/lasi700: Fix section mismatches
2017-08-22 16:34:36 +02:00
libiscsi_tcp.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
libiscsi.c
scsi: iscsi: Fix a potential deadlock in the timeout handler
2019-12-21 10:57:41 +01:00
mac53c94.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mac53c94.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mac_esp.c
scsi: esp_scsi: Track residual for PIO transfers
2018-11-13 11:08:32 -08:00
mac_scsi.c
scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE
2020-01-04 19:12:56 +01:00
Makefile
SCSI misc on 20180815
2018-08-15 22:06:26 -07:00
megaraid.c
scsi: megaraid: disable device when probe failed after enabled device
2019-10-29 09:19:29 +01:00
megaraid.h
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
mesh.c
scsi: mesh: Fix panic after host or bus reset
2020-08-19 08:14:59 +02:00
mesh.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mvme16x_scsi.c
…
mvme147.c
scsi: mvme147: stop using scsi_module.c
2018-03-19 22:54:47 -04:00
mvme147.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mvumi.c
scsi: mvumi: Fix error return in mvumi_io_attach()
2020-10-30 10:38:28 +01:00
mvumi.h
…
ncr53c8xx.c
scsi: ncr53c8xx: remove ScsiResult macro
2018-07-10 22:42:47 -04:00
ncr53c8xx.h
…
NCR5380.c
scsi: NCR5380: Add disconnect_mask module parameter
2020-01-04 19:13:04 +01:00
NCR5380.h
scsi: NCR5380: Have NCR5380_select() return a bool
2019-11-20 18:47:49 +01:00
nsp32_debug.c
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
nsp32_io.h
…
nsp32.c
scsi: nsp32: fix logic bug in error handling
2017-10-16 22:38:44 -04:00
nsp32.h
…
osst_detect.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
osst_options.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
osst.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
osst.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pmcraid.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
pmcraid.h
scsi: pmcraid: Use sgl_alloc_order() and sgl_free_order()
2018-02-13 21:49:15 -05:00
ppa.c
scsi: ppa: mark expected switch fall-throughs
2017-12-04 20:32:52 -05:00
ppa.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ps3rom.c
…
qla1280.c
timer: Remove init_timer_on_stack() in favor of timer_setup_on_stack()
2017-10-05 15:01:17 +02:00
qla1280.h
timer: Remove init_timer_on_stack() in favor of timer_setup_on_stack()
2017-10-05 15:01:17 +02:00
qlogicfas408.c
scsi: qlogicfas: move bus_reset to host_reset
2017-08-25 17:21:11 -04:00
qlogicfas408.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
qlogicfas.c
scsi: qlogicfas: move bus_reset to host_reset
2017-08-25 17:21:11 -04:00
qlogicpti.c
scsi: read host_busy via scsi_host_busy()
2018-06-26 12:53:26 -04:00
qlogicpti.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid_class.c
scsi: raid_attrs: fix unused variable warning
2018-12-19 19:19:49 +01:00
script_asm.pl
…
scsi_common.c
scsi: core: doc. fixes to scsi_common.c
2017-12-11 21:39:39 -05:00
scsi_debug.c
scsi: scsi_debug: Add check for sdebug_max_queue during module init
2020-08-19 08:14:57 +02:00
scsi_debugfs.c
scsi: devinfo: use const_ilog2 for array indices
2018-04-20 19:14:28 -04:00
scsi_debugfs.h
…
scsi_devinfo.c
scsi: core: add new RDAC LENOVO/DE_Series device
2019-05-08 07:21:49 +02:00
scsi_dh.c
scsi: core: add new RDAC LENOVO/DE_Series device
2019-05-08 07:21:49 +02:00
scsi_error.c
scsi: core: save/restore command resid for error handling
2019-10-29 09:19:49 +01:00
scsi_ioctl.c
scsi: core: check for equality of result byte values
2018-06-26 12:27:06 -04:00
scsi_lib_dma.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
scsi_lib.c
scsi: core: Handle drivers which set sg_tablesize to zero
2019-11-20 18:45:10 +01:00
scsi_logging.c
scsi: core: Reduce memory required for SCSI logging
2019-10-07 18:57:04 +02:00
scsi_logging.h
SCSI misc on 20171114
2017-11-14 16:23:44 -08:00
scsi_netlink.c
…
scsi_pm.c
scsi: core: Synchronize request queue PM status only on successful resume
2019-01-22 21:40:32 +01:00
scsi_priv.h
scsi: dh: Remove scsi_dh_remove_device()
2017-12-07 21:13:45 -05:00
scsi_proc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
scsi_sas_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
scsi_scan.c
scsi: core: Don't start concurrent async scan on same host
2020-11-10 12:35:59 +01:00
scsi_sysctl.c
…
scsi_sysfs.c
scsi: core: try to get module before removing device
2019-10-29 09:19:50 +01:00
scsi_trace.c
scsi: core: scsi_trace: Use get_unaligned_be*()
2020-01-23 08:21:38 +01:00
scsi_transport_api.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
scsi_transport_fc.c
SCSI misc on 20180815
2018-08-15 22:06:26 -07:00
scsi_transport_iscsi.c
scsi: iscsi: Do not put host in iscsi_set_flashnode_param()
2020-09-03 11:24:22 +02:00
scsi_transport_sas.c
SCSI misc on 20180610
2018-06-10 13:01:12 -07:00
scsi_transport_spi.c
scsi: scsi_transport_spi: Fix function pointer check
2020-07-29 10:16:45 +02:00
scsi_transport_srp.c
for-4.18/block-20180603
2018-06-04 07:58:06 -07:00
scsi.c
scsi: read host_busy via scsi_host_busy()
2018-06-26 12:53:26 -04:00
scsi.h
scsi: core: remove Scsi_Cmnd typedef
2018-06-19 22:02:25 -04:00
scsicam.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sd_dif.c
block: move dif_prepare/dif_complete functions to block layer
2018-07-30 08:27:02 -06:00
sd_zbc.c
SCSI misc on 20180815
2018-08-15 22:06:26 -07:00
sd.c
scsi: sd: Fix optimal I/O size for devices that change reported values
2020-04-02 15:28:17 +02:00
sd.h
block: move dif_prepare/dif_complete functions to block layer
2018-07-30 08:27:02 -06:00
sense_codes.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ses.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
sg.c
scsi: sg: add sg_remove_request in sg_write
2020-05-20 08:18:34 +02:00
sgiwd93.c
scsi: drop bus reset for wd33c93-compatible boards
2017-08-25 17:21:10 -04:00
sim710.c
…
sni_53c710.c
scsi: sni_53c710: fix compilation error
2019-11-10 11:27:21 +01:00
sr_ioctl.c
block: Switch struct packet_command to use struct scsi_sense_hdr
2018-08-02 15:22:13 -06:00
sr_vendor.c
scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled
2020-07-22 09:32:04 +02:00
sr.c
scsi: sr: Fix sr_probe() missing deallocate of device minor
2020-06-25 15:32:52 +02:00
sr.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
st_options.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
st.c
scsi: st: remove redundant pointer STbuffer
2018-08-08 21:15:54 -04:00
st.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stex.c
…
storvsc_drv.c
scsi: storvsc: Fix calculation of sub-channel count
2019-05-08 07:21:49 +02:00
sun3_scsi_vme.c
…
sun3_scsi.c
scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE
2020-01-04 19:12:56 +01:00
sun3x_esp.c
scsi: jazz_esp, sun3x_esp: Pass struct device pointer in dma calls
2018-03-12 22:05:43 -04:00
sun_esp.c
…
virtio_scsi.c
scsi: virtio_scsi: don't send sc payload with tmfs
2019-03-23 20:09:59 +01:00
vmw_pvscsi.c
scsi: vmw_pscsi: Fix use-after-free in pvscsi_queue_lck()
2019-07-03 13:14:45 +02:00
vmw_pvscsi.h
…
wd33c93.c
scsi: drop bus reset for wd33c93-compatible boards
2017-08-25 17:21:10 -04:00
wd33c93.h
…
wd719x.c
scsi: wd719x: Use module_pci_driver
2018-05-01 23:30:12 -04:00
wd719x.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xen-scsifront.c
scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-19 14:54:41 +02:00
zalon.c
…
zorro7xx.c
…
zorro_esp.c
scsi: zorro_esp: Limit DMA transfers to 65536 bytes (except on Fastlane)
2019-12-17 20:36:03 +01:00