AuxXxilium/linux_dsm_epyc7002
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68ab2d76e4
linux_dsm_epyc7002/drivers/scsi
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Uma Krishnan 68ab2d76e4 scsi: cxlflash: Set sg_tablesize to 1 instead of SG_NONE 
The following Oops is encountered when blk_mq is enabled with the
cxlflash driver:

[ 2960.817172] Oops: Kernel access of bad area, sig: 11 [#5]
[ 2960.817309] NIP  __blk_mq_run_hw_queue+0x278/0x4c0
[ 2960.817313] LR __blk_mq_run_hw_queue+0x2bc/0x4c0
[ 2960.817314] Call Trace:
[ 2960.817320] __blk_mq_run_hw_queue+0x2bc/0x4c0 (unreliable)
[ 2960.817324] blk_mq_run_hw_queue+0xd8/0x100
[ 2960.817329] blk_mq_insert_requests+0x14c/0x1f0
[ 2960.817333] blk_mq_flush_plug_list+0x150/0x190
[ 2960.817338] blk_flush_plug_list+0x11c/0x2b0
[ 2960.817344] blk_finish_plug+0x58/0x80
[ 2960.817348] __do_page_cache_readahead+0x1c0/0x2e0
[ 2960.817352] force_page_cache_readahead+0x68/0xd0
[ 2960.817356] generic_file_read_iter+0x43c/0x6a0
[ 2960.817359] blkdev_read_iter+0x68/0xa0
[ 2960.817361] __vfs_read+0x11c/0x180
[ 2960.817364] vfs_read+0xa4/0x1c0
[ 2960.817366] SyS_read+0x6c/0x110
[ 2960.817369] system_call+0x38/0xb4

The SCSI blk_mq stack assumes that sg_tablesize is always a non-zero
value with scsi_mq_setup_tags() allocating tags using sg_tablesize.
The cxlflash driver currently uses SG_NONE (0) for the sg_tablesize
as the devices it supports are not capable of scatter gather. This
mismatch of values results in the Oops above.

To resolve this issue, sg_tablesize for cxlflash can simply be set
to 1, a value which satisfies the constraints in cxlflash and the
lack of support of SG_NONE in SCSI blk_mq.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-30 11:34:00 -05:00
..
aacraid scsi: aacraid: switch to pci_alloc_irq_vectors 2016-11-17 20:29:55 -05:00
aic7xxx
aic94xx scsi: aic94xx: Add a missing call to kfree 2016-11-29 11:21:49 -05:00
arcmsr scsi: arcmsr: Use pci_alloc_irq_vectors 2016-11-08 17:29:46 -05:00
arm scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
be2iscsi Merge remote-tracking branch 'mkp-scsi/4.9/scsi-fixes' into fixes 2016-10-21 12:40:02 -04:00
bfa scsi: bfa: turn bfa_mem_{kva,dma}_setup into inline functions 2016-11-21 22:28:17 -05:00
bnx2fc scsi: libfc: Remove fc_rport_init() 2016-11-08 17:29:56 -05:00
bnx2i bnx2i: fix spelling mistake "complection" -> "completion" 2016-07-12 23:16:31 -04:00
csiostor scsi: csiostor: Fix completion usage 2016-09-14 13:19:15 -04:00
cxgbi SCSI misc on 20161014 2016-10-14 11:37:50 -07:00
cxlflash scsi: cxlflash: Set sg_tablesize to 1 instead of SG_NONE 2016-11-30 11:34:00 -05:00
device_handler scsi: scsi_dh_alua: Fix memory leak in alua_rtpg() 2016-09-26 20:42:38 -04:00
dpt
esas2r scsi: esas2r: don't reinitialize adapter's req_table 2016-08-25 22:28:17 -04:00
fcoe scsi: libfc: Remove fc_rport_init() 2016-11-08 17:29:56 -05:00
fnic scsi: fnic: Correcting rport check location in fnic_queuecommand_lck 2016-11-16 20:41:49 -05:00
hisi_sas scsi: hisi_sas: shift vs compare typos 2016-11-29 11:27:54 -05:00
ibmvscsi scsi: fc: use bsg_job_done 2016-11-17 20:15:26 -05:00
ibmvscsi_tgt scsi: ibmvscsis: Issues from Dan Carpenter/Smatch 2016-11-08 17:29:54 -05:00
isci scsi: isci: Add a missing call to pci_unmap_biosrom 2016-11-29 11:50:21 -05:00
libfc scsi: libfc: Remove an unneeded condition 2016-11-25 10:07:00 -05:00
libsas SCSI misc on 20160727 2016-07-27 14:48:37 -07:00
lpfc scsi: fc: use bsg_job_done 2016-11-17 20:15:26 -05:00
megaraid scsi: megaraid-sas: request irqs later 2016-11-16 20:19:29 -05:00
mpt3sas scsi: mpt3sas: fix some spelling mistakes in message and comments 2016-11-08 18:16:31 -05:00
mvsas scsi: mvsas: fix command_active typo 2016-11-16 20:49:08 -05:00
osd scsi/osd: open code blk_make_request 2016-07-20 17:38:35 -06:00
pcmcia
pm8001 scsi: pm8001: Mark symbols static where possible 2016-09-26 21:10:45 -04:00
qla2xxx scsi: fc: use bsg_job_done 2016-11-17 20:15:26 -05:00
qla4xxx scsi: qla4xxx: print MAC and SID via %p[mM][R] 2016-11-08 17:29:57 -05:00
smartpqi scsi: smartpqi: switch to pci_alloc_irq_vectors 2016-11-08 17:30:00 -05:00
snic snic: Fix use-after-free in case of a dma mapping error 2016-07-12 23:16:31 -04:00
sym53c8xx_2 scsi: sym53c8xx_2: Use complete() instead complete_all() 2016-09-14 13:19:29 -04:00
ufs scsi: ufs: fix default power mode to FAST/SLOW 2016-11-29 12:06:57 -05:00
.gitignore
3w-9xxx.c
3w-9xxx.h
3w-sas.c
3w-sas.h
3w-xxxx.c
3w-xxxx.h
53c700_d.h_shipped
53c700.c scsi: remove current_cmnd field from struct scsi_device 2016-07-13 22:33:23 -04:00
53c700.h scsi: remove current_cmnd field from struct scsi_device 2016-07-13 22:33:23 -04:00
53c700.scr
a100u2w.c
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c scsi: advansys: fix build warning for PCI=n 2016-11-08 17:29:58 -05:00
aha152x.c
aha152x.h
aha1542.c
aha1542.h
aha1740.c
aha1740.h
am53c974.c
atari_scsi.c scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
atp870u.c
atp870u.h
BusLogic.c
BusLogic.h
bvme6000_scsi.c
ch.c
constants.c scsi: fix upper bounds check of sense key in scsi_sense_key_string() 2016-08-16 00:49:32 -04:00
dc395x.c
dc395x.h
dmx3191d.c scsi: dmx3191d: use module_pci_driver 2016-11-16 20:43:50 -05:00
dpt_i2o.c scsi: dpt_i2o: Add a missing call to kfree 2016-11-29 11:54:40 -05:00
dpti.h
eata_generic.h
eata_pio.c
eata_pio.h
eata.c
esp_scsi.c
esp_scsi.h
fdomain.c
fdomain.h
FlashPoint.c
g_NCR5380.c scsi: g_NCR5380: Fix release_region in error handling 2016-11-12 10:42:44 -05:00
g_NCR5380.h scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
gdth_ioctl.h
gdth_proc.c
gdth_proc.h
gdth.c
gdth.h
gvp11.c
gvp11.h
hosts.c SCSI misc on 20161006 2016-10-07 09:28:53 -07:00
hpsa_cmd.h scsi: hpsa: Check for vpd support before sending 2016-09-14 14:19:31 -04:00
hpsa.c scsi: hpsa: add 'ctlr_num' sysfs attribute 2016-11-29 11:21:48 -05:00
hpsa.h scsi: hpsa: use pci_alloc_irq_vectors and automatic irq affinity 2016-11-12 10:11:06 -05:00
hptiop.c
hptiop.h
imm.c
imm.h
initio.c
initio.h
ipr.c scsi: ipr: Use pci_irq_allocate_vectors 2016-11-08 17:29:46 -05:00
ipr.h scsi: ipr: Use pci_irq_allocate_vectors 2016-11-08 17:29:46 -05:00
ips.c scsi: ips: don't use custom hex_asc_upper[] table 2016-11-08 17:29:57 -05:00
ips.h
iscsi_boot_sysfs.c
iscsi_tcp.c
iscsi_tcp.h
jazz_esp.c
Kconfig scsi: fc: Use bsg_destroy_job 2016-11-17 20:15:25 -05:00
lasi700.c
libiscsi_tcp.c
libiscsi.c scsi: libiscsi: Fix locking in __iscsi_conn_send_pdu 2016-10-17 13:34:44 -04:00
mac53c94.c
mac53c94.h
mac_esp.c
mac_scsi.c scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
Makefile scsi: g_NCR5380: Merge g_NCR5380 and g_NCR5380_mmio drivers 2016-11-08 17:29:47 -05:00
megaraid.c
megaraid.h
mesh.c
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c
mvumi.h
ncr53c8xx.c
ncr53c8xx.h
NCR53c406a.c
NCR5380.c scsi: ncr5380: Suppress unhelpful "interrupt without IRQ bit" message 2016-11-08 17:29:48 -05:00
NCR5380.h scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32_debug.c
nsp32_io.h
nsp32.c
nsp32.h
osst_detect.h
osst_options.h
osst.c
osst.h
pmcraid.c scsi: pmcraid: Add missing resource releases 2016-11-22 17:04:32 -05:00
pmcraid.h
ppa.c
ppa.h
ps3rom.c
qla1280.c
qla1280.h
qlogicfas408.c
qlogicfas408.h
qlogicfas.c
qlogicpti.c
qlogicpti.h
raid_class.c
script_asm.pl
scsi_common.c
scsi_debug.c scsi: scsi_debug: Fix memory leak if LBP enabled and module is unloaded 2016-10-26 22:14:50 -04:00
scsi_devinfo.c scsi: blacklist all RDAC devices for BLIST_NO_ULD_ATTACH 2016-08-16 00:58:13 -04:00
scsi_dh.c scsi: Replace wrong device handler name for CLARiiON arrays 2016-10-11 17:56:51 -04:00
scsi_error.c Merge remote-tracking branch 'mkp-scsi/4.7/scsi-fixes' into fixes 2016-06-18 11:59:01 -07:00
scsi_ioctl.c
scsi_lib_dma.c
scsi_lib.c scsi: srp_transport: Move queuecommand() wait code to SCSI core 2016-11-29 11:21:27 -05:00
scsi_logging.c
scsi_logging.h
scsi_module.c
scsi_netlink.c
scsi_pm.c
scsi_priv.h SCSI misc on 20161006 2016-10-07 09:28:53 -07:00
scsi_proc.c
scsi_sas_internal.h
scsi_scan.c scsi: Remove one useless stack variable 2016-10-11 18:02:09 -04:00
scsi_sysctl.c
scsi_sysfs.c
scsi_trace.c
scsi_transport_api.h
scsi_transport_fc.c scsi: fc: move FC transport's bsg code to bsg-lib 2016-11-17 20:15:26 -05:00
scsi_transport_iscsi.c
scsi_transport_sas.c scsi: sas: remove is_sas_attached() 2016-08-18 22:23:20 -04:00
scsi_transport_spi.c
scsi_transport_srp.c scsi: srp_transport: Move queuecommand() wait code to SCSI core 2016-11-29 11:21:27 -05:00
scsi_typedefs.h
scsi.c scsi: Avoid that toggling use_blk_mq triggers a memory leak 2016-09-26 20:58:42 -04:00
scsi.h
scsicam.c
sd_dif.c scsi: sd: Move DIF protection types to t10-pi.h 2016-09-15 09:51:14 -04:00
sd.c scsi: replace custom approach to hexdump small buffers 2016-11-08 17:29:57 -05:00
sd.h scsi: sd: Move DIF protection types to t10-pi.h 2016-09-15 09:51:14 -04:00
sense_codes.h
ses.c scsi: ses: use scsi_is_sas_rphy instead of is_sas_attached 2016-08-18 22:22:19 -04:00
sg.c scsi: sg: Use mult_frac, drop MULDIV macro 2016-08-30 22:18:59 -04:00
sgiwd93.c
sim710.c
sni_53c710.c
sr_ioctl.c
sr_vendor.c
sr.c scsi: sr: constify sr_pm_ops structure 2016-09-04 01:28:08 -04:00
sr.h
st_options.h
st.c mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2016-10-18 14:13:37 -07:00
st.h
stex.c
storvsc_drv.c scsi: storvsc: Filter out storvsc messages CD-ROM medium not present 2016-07-12 23:16:31 -04:00
sun3_scsi_vme.c
sun3_scsi.c scsi: ncr5380: Use correct types for DMA routines 2016-11-08 17:29:48 -05:00
sun3_scsi.h
sun3x_esp.c
sun_esp.c
sym53c416.c
sym53c416.h
virtio_scsi.c SCSI misc on 20161006 2016-10-07 09:28:53 -07:00
vmw_pvscsi.c vmw_pvscsi: Change to update maintainer details (name, email) 2016-07-12 23:16:31 -04:00
vmw_pvscsi.h vmw_pvscsi: Change to update maintainer details (name, email) 2016-07-12 23:16:31 -04:00
wd33c93.c
wd33c93.h
wd719x.c drivers/scsi/wd719x.c: remove last declaration using DEFINE_PCI_DEVICE_TABLE 2016-09-01 17:52:01 -07:00
wd719x.h
xen-scsifront.c
zalon.c
zorro7xx.c