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linux/drivers/scsi
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Bart Van Assche 56cc81bb39 BACKPORT: FROMLIST: scsi: ufs: Fix a deadlock in the error handler 
The following deadlock has been observed on a test setup:
* All tags allocated.
* The SCSI error handler calls ufshcd_eh_host_reset_handler()
* ufshcd_eh_host_reset_handler() queues work that calls ufshcd_err_handler()
* ufshcd_err_handler() locks up as follows:

Workqueue: ufs_eh_wq_0 ufshcd_err_handler.cfi_jt
Call trace:
 __switch_to+0x298/0x5d8
 __schedule+0x6cc/0xa94
 schedule+0x12c/0x298
 blk_mq_get_tag+0x210/0x480
 __blk_mq_alloc_request+0x1c8/0x284
 blk_get_request+0x74/0x134
 ufshcd_exec_dev_cmd+0x68/0x640
 ufshcd_verify_dev_init+0x68/0x35c
 ufshcd_probe_hba+0x12c/0x1cb8
 ufshcd_host_reset_and_restore+0x88/0x254
 ufshcd_reset_and_restore+0xd0/0x354
 ufshcd_err_handler+0x408/0xc58
 process_one_work+0x24c/0x66c
 worker_thread+0x3e8/0xa4c
 kthread+0x150/0x1b4
 ret_from_fork+0x10/0x30

Fix this lockup by making ufshcd_exec_dev_cmd() allocate a reserved
request.

This patch is closely related to the upstream patch with the same title.

Bug: 205080886
Link: https://lore.kernel.org/linux-scsi/700f0463-23a9-8465-f712-1188cb884dea@acm.org/T/#u
Change-Id: I9e9ba3f45ba23ecf576380aa19701d3437af6cdd
Signed-off-by: Bart Van Assche <bvanassche@google.com>
2021-11-08 10:01:41 -08:00
..
aacraid scsi: aacraid: Improve compat_ioctl handlers 2020-12-30 11:53:02 +01:00
aic7xxx scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8 2021-07-25 14:36:16 +02:00
aic94xx scsi: libsas: Add LUN number check in .slave_alloc callback 2021-07-25 14:36:16 +02:00
arcmsr scsi: arcmsr: Fix doorbell status being updated late on ARC-1886 2021-07-20 16:05:39 +02:00
arm SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
be2iscsi scsi: be2iscsi: Fix an error handling path in beiscsi_dev_probe() 2021-07-20 16:05:58 +02:00
bfa SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
bnx2fc scsi: bnx2fc: Return failure if io_req is already in ABTS processing 2021-06-16 12:01:36 +02:00
bnx2i scsi: iscsi: Fix shost->max_id use 2021-07-20 16:05:41 +02:00
csiostor SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
cxgbi scsi: iscsi: Fix shost->max_id use 2021-07-20 16:05:41 +02:00
cxlflash powerpc updates for 5.10 2020-10-16 12:21:15 -07:00
device_handler scsi: scsi_dh_rdac: Avoid crash during rdac_bus_attach() 2021-08-26 08:35:37 -04:00
dpt scsi: docs: convert dpti.txt to ReST 2020-03-11 23:07:59 -04:00
esas2r SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
fcoe SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
fnic scsi: fnic: Fix memleak in vnic_dev_init_devcmd2 2021-02-07 15:37:14 +01:00
hisi_sas scsi: libsas: Add LUN number check in .slave_alloc callback 2021-07-25 14:36:16 +02:00
ibmvscsi scsi: ibmvfc: Fix invalid state machine BUG_ON() 2021-05-14 09:50:27 +02:00
ibmvscsi_tgt treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
isci scsi: libsas: Add LUN number check in .slave_alloc callback 2021-07-25 14:36:16 +02:00
libfc scsi: libfc: Fix array index out of bound exception 2021-07-25 14:36:16 +02:00
libsas scsi: libsas: Add LUN number check in .slave_alloc callback 2021-07-25 14:36:16 +02:00
lpfc scsi: lpfc: Move initialization of phba->poll_list earlier to avoid crash 2021-08-18 08:59:06 +02:00
megaraid scsi: megaraid_mm: Fix end of loop tests for list_for_each_entry() 2021-08-26 08:35:36 -04:00
mpt3sas scsi: mpt3sas: Fix deadlock while cancelling the running firmware event 2021-07-20 16:05:40 +02:00
mvsas scsi: libsas: Add LUN number check in .slave_alloc callback 2021-07-25 14:36:16 +02:00
pcmcia treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pm8001 scsi: pm80xx: Fix TMF task completion race condition 2021-08-26 08:35:36 -04:00
qedf scsi: qedf: Add check to synchronize abort and flush 2021-07-25 14:36:16 +02:00
qedi scsi: qedi: Fix cleanup session block/unblock use 2021-07-20 16:05:41 +02:00
qla2xxx scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal 2021-06-16 12:01:37 +02:00
qla4xxx SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
smartpqi scsi: smartpqi: Add new PCI IDs 2021-05-11 14:47:27 +02:00
snic scsi: snic: Simplify the return expression of svnic_cq_alloc() 2020-10-07 23:50:03 -04:00
sym53c8xx_2 SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
ufs BACKPORT: FROMLIST: scsi: ufs: Fix a deadlock in the error handler 2021-11-08 10:01:41 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
3w-9xxx.c
3w-9xxx.h
3w-sas.c
3w-sas.h
3w-xxxx.c compat_ioctl: move more drivers to compat_ptr_ioctl 2019-10-23 17:23:44 +02:00
3w-xxxx.h
53c700_d.h_shipped
53c700.c SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
53c700.h 53c700: improve non-coherent DMA handling 2020-09-25 06:20:43 +02:00
53c700.scr
a100u2w.c
a100u2w.h
a2091.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
a2091.h
a3000.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
a3000.h
a4000t.c
advansys.c scsi: advansys: Replace zero-length array with flexible-array member 2020-02-18 00:39:54 -05:00
aha152x.c scsi: aha152x: Remove unused variable 'ret' 2020-07-08 01:12:53 -04:00
aha152x.h
aha1542.c
aha1542.h
aha1740.c scsi: aha1740: Fix an errro handling path in aha1740_probe() 2020-03-26 21:10:53 -04:00
aha1740.h
am53c974.c
atari_scsi.c scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE 2019-11-12 22:21:34 -05:00
atp870u.c scsi: core: Clean up SG_NONE 2019-11-12 22:21:35 -05:00
atp870u.h
BusLogic.c scsi: BusLogic: Fix 64-bit system enumeration error for Buslogic 2021-06-03 09:00:43 +02:00
BusLogic.h scsi: BusLogic: Fix 64-bit system enumeration error for Buslogic 2021-06-03 09:00:43 +02:00
bvme6000_scsi.c
ch.c scsi: ch: remove ch_mutex() 2020-02-24 14:54:25 -05:00
constants.c scsi: core: Add DID_ALLOC_FAILURE and DID_MEDIUM_ERROR to hostbyte_table 2020-04-01 22:03:04 -04:00
dc395x.c scsi: dc395x: Use module_pci_driver() to simplify the code 2020-10-07 21:48:28 -04:00
dc395x.h
dmx3191d.c
dpt_i2o.c scsi: dpt_i2o: Remove set but not used 'pHba' 2020-09-01 22:15:47 -04:00
dpti.h scsi: docs: convert dpti.txt to ReST 2020-03-11 23:07:59 -04:00
esp_scsi.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
esp_scsi.h scsi: esp_scsi: Add support for FSC chip 2019-12-19 22:08:51 -05:00
fdomain_isa.c scsi: fdomain_isa: Merge branches in fdomain_isa_match() 2020-09-02 22:49:07 -04:00
fdomain_pci.c scsi: fdomain: Resurrect driver - PCI support 2019-06-18 19:46:18 -04:00
fdomain.c scsi: fdomain: use BSTAT_{MSG|CMD|IO} in fdomain_work() 2019-07-30 12:17:28 -04:00
fdomain.h scsi: fdomain: Mark 'fdomain_pm_ops' as __maybe_unused 2020-07-08 01:12:44 -04:00
FlashPoint.c scsi: FlashPoint: Rename si_flags field 2021-07-14 16:56:40 +02:00
g_NCR5380.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
gdth_ioctl.h
gdth_proc.c scsi: gdth: Use scnprintf() for avoiding potential buffer overflow 2020-03-17 13:36:10 -04:00
gdth_proc.h
gdth.c scsi: gdth: Make option_setup() static 2020-10-07 21:48:28 -04:00
gdth.h
gvp11.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
gvp11.h
hosts.c BACKPORT: FROMLIST: scsi: core: Reserve one tag for the UFS driver 2021-11-08 10:01:41 -08:00
hpsa_cmd.h scsi: hpsa: Update copyright 2020-09-02 22:49:06 -04:00
hpsa.c scsi: hpsa: Fix memory leak in hpsa_init_one() 2020-10-29 21:55:21 -04:00
hpsa.h scsi: hpsa: Update copyright 2020-09-02 22:49:06 -04:00
hptiop.c
hptiop.h
imm.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
imm.h
initio.c scsi: initio: Use module_pci_driver() to simplify the code 2020-10-07 21:48:28 -04:00
initio.h
ipr.c SCSI misc on 20200806 2020-08-06 16:50:07 -07:00
ipr.h scsi: ipr: Fix struct packed-not-aligned issues 2020-07-15 17:26:58 -04:00
ips.c scsi: ips: Convert strnlen() to memcpy() since result should not be NUL terminated 2020-07-24 22:32:00 -04:00
ips.h
iscsi_boot_sysfs.c scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj 2020-06-02 21:23:47 -04:00
iscsi_tcp.c block-5.10-2020-10-12 2020-10-13 12:12:44 -07:00
iscsi_tcp.h
jazz_esp.c scsi: jazz_esp: Add IRQ check 2021-05-14 09:50:27 +02:00
Kconfig scsi: lpfc: Add dependency on CPU_FREQ 2020-07-24 22:09:55 -04:00
lasi700.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
libiscsi_tcp.c scsi: libiscsi: use sendpage_ok() in iscsi_tcp_segment_map() 2020-10-02 15:27:08 -07:00
libiscsi.c scsi: iscsi: Fix conn use after free during resets 2021-07-20 16:05:41 +02:00
mac_esp.c scsi: mac_esp: Use module_platform_driver to simplify the code 2020-10-02 21:52:53 -04:00
mac_scsi.c scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE 2019-11-12 22:21:34 -05:00
mac53c94.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
mac53c94.h
Makefile scsi: remove pointless $(MODVERDIR)/$(obj)/53c700.ver 2019-07-17 22:39:27 +09:00
megaraid.c SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
megaraid.h
mesh.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mesh.h
mvme16x_scsi.c
mvme147.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
mvme147.h
mvumi.c scsi: mvumi: Fix error return in mvumi_io_attach() 2020-10-02 21:42:22 -04:00
mvumi.h scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
myrb.c SCSI misc on 20201023 2020-10-23 16:19:02 -07:00
myrb.h scsi: mylex: Use the correct style for SPDX License Identifier 2020-01-02 21:57:44 -05:00
myrs.c scsi: myrs: Fix a double free in myrs_cleanup() 2021-03-25 09:04:09 +01:00
myrs.h scsi: mylex: Use the correct style for SPDX License Identifier 2020-01-02 21:57:44 -05:00
ncr53c8xx.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ncr53c8xx.h
NCR5380.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
NCR5380.h Revert "scsi: ncr5380: Increase register polling limit" 2019-06-20 15:37:02 -04:00
nsp32_debug.c
nsp32_io.h
nsp32.c scsi: nsp32: Remove unneeded semicolon 2020-09-15 17:34:18 -04:00
nsp32.h
pmcraid.c scsi: pmcraid: Remove set but not used 'res' 2020-09-09 22:40:41 -04:00
pmcraid.h scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
ppa.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ppa.h
ps3rom.c
qla1280.c scsi: qla1280: Remove set but not used variable in qla1280_status_entry() 2020-09-09 22:37:48 -04:00
qla1280.h scsi: qla1280: Fix dma firmware download, if dma address is 64bit 2020-01-15 23:09:11 -05:00
qlogicfas.c
qlogicfas408.c
qlogicfas408.h
qlogicpti.c SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi_common.c
scsi_debug.c scsi: scsi_debug: Fix a memory leak 2021-02-17 11:02:27 +01:00
scsi_debugfs.c scsi: scsi_debugfs: Use for_each_set_bit to simplify code 2019-07-30 12:42:55 -04:00
scsi_debugfs.h
scsi_devinfo.c scsi: scsi_devinfo: Add blacklist entry for HPE OPEN-V 2021-06-18 10:00:05 +02:00
scsi_dh.c scsi: dh: Add Fujitsu device to devinfo and dh lists 2020-07-08 01:16:23 -04:00
scsi_error.c SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
scsi_ioctl.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
scsi_lib_dma.c
scsi_lib.c BACKPORT: FROMLIST: scsi: core: Reserve one tag for the UFS driver 2021-11-08 10:01:41 -08:00
scsi_logging.c scsi: core: Delete unnecessary buffer allocation for every loop iteration 2020-07-24 22:09:57 -04:00
scsi_logging.h scsi: core: Fix a compiler warning triggered by the SCSI logging code 2019-12-19 22:08:54 -05:00
scsi_netlink.c
scsi_pm.c scsi: block: pm: Simplify resume handling 2020-07-24 22:09:55 -04:00
scsi_priv.h scsi: core: Add limitless cmd retry support 2020-10-02 18:53:06 -04:00
scsi_proc.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
scsi_sas_internal.h
scsi_scan.c scsi: core: Avoid printing an error if target_alloc() returns -ENXIO 2021-08-26 08:35:37 -04:00
scsi_sysctl.c
scsi_sysfs.c scsi: core: Fix hang of freezing queue between blocking and running device 2021-09-03 10:09:23 +02:00
scsi_trace.c scsi: scsi_trace: Use get_unaligned_be24() 2020-03-16 22:08:36 -04:00
scsi_transport_api.h
scsi_transport_fc.c scsi: fc: Add 256GBit speed setting to SCSI FC transport 2020-09-02 22:49:07 -04:00
scsi_transport_iscsi.c scsi: iscsi: Fix iface sysfs attr detection 2021-07-28 14:35:39 +02:00
scsi_transport_sas.c scsi: core: Fixup calling convention for scsi_mode_sense() 2021-07-20 16:05:40 +02:00
scsi_transport_spi.c scsi: scsi_transport_spi: Set RQF_PM for domain validation commands 2021-01-12 20:18:15 +01:00
scsi_transport_srp.c scsi: scsi_transport_srp: Don't block target in SRP_PORT_LOST state 2021-04-21 13:00:52 +02:00
scsi.c scsi: core: Remove scsi_sdb_cache 2020-06-19 23:06:43 -04:00
scsi.h
scsicam.c block: move struct partition out of genhd.h 2020-03-24 07:57:08 -06:00
sd_dif.c
sd_zbc.c scsi: sd: sd_zbc: Don't pass GFP_NOIO to kvcalloc 2021-03-04 11:38:21 +01:00
sd.c scsi: core: Fixup calling convention for scsi_mode_sense() 2021-07-20 16:05:40 +02:00
sd.h ANDROID: GKI: scsi.h: add Android ABI padding to a structure 2021-03-18 16:02:51 +01:00
sense_codes.h scsi: core: Update additional sense codes list 2020-09-15 20:28:06 -04:00
ses.c SCSI misc on 20190709 2019-07-11 15:14:01 -07:00
sg.c Revert "Revert "iov_iter: transparently handle compat iovecs in import_iovec"" 2020-11-02 09:27:36 +01:00
sgiwd93.c sgiwd93: convert to dma_alloc_noncoherent 2020-09-25 06:20:44 +02:00
sim710.c
sni_53c710.c scsi: sni_53c710: Add IRQ check 2021-05-14 09:50:27 +02:00
sr_ioctl.c
sr_vendor.c scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled 2020-02-24 14:59:01 -05:00
sr.c scsi: sr: Return correct event when media event code is 3 2021-08-12 13:22:04 +02:00
sr.h scsi: sr: get rid of sr global mutex 2020-02-24 15:01:57 -05:00
st_options.h
st.c scsi: st: Fix a use after free in st_open() 2021-04-07 15:00:05 +02:00
st.h
stex.c scsi: Replace zero-length array with flexible-array member 2020-03-11 23:07:56 -04:00
storvsc_drv.c scsi: storvsc: Correctly handle multiple flags in srb_status 2021-07-20 16:05:43 +02:00
sun_esp.c scsi: sun_esp: Use module_platform_driver to simplify the code 2020-10-02 21:52:55 -04:00
sun3_scsi_vme.c
sun3_scsi.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
sun3x_esp.c scsi: sun3x_esp: Add IRQ check 2021-05-14 09:50:27 +02:00
virtio_scsi.c SCSI misc on 20201013 2020-10-14 15:15:35 -07:00
vmw_pvscsi.c scsi: vmw_pvscsi: Set correct residual data length 2021-06-16 12:01:37 +02:00
vmw_pvscsi.h
wd33c93.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
wd33c93.h
wd719x.c SCSI misc on 20190709 2019-07-11 15:14:01 -07:00
wd719x.h
xen-scsifront.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
zalon.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
zorro_esp.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
zorro7xx.c