android_kernel_samsung_a7y1.../drivers/scsi
Martin K. Petersen a43e3f8e44 scsi: sd: Fix optimal I/O size for devices that change reported values
commit ea697a8bf5a4161e59806fab14f6e4a46dc7dcb0 upstream.

Some USB bridge devices will return a default set of characteristics during
initialization. And then, once an attached drive has spun up, substitute
the actual parameters reported by the drive. According to the SCSI spec,
the device should return a UNIT ATTENTION in case any reported parameters
change. But in this case the change is made silently after a small window
where default values are reported.

Commit a83da8a4509d ("scsi: sd: Optimal I/O size should be a multiple of
physical block size") validated the reported optimal I/O size against the
physical block size to overcome problems with devices reporting nonsensical
transfer sizes. However, this validation did not account for the fact that
aforementioned devices will return default values during a brief window
during spin-up. The subsequent change in reported characteristics would
invalidate the checking that had previously been performed.

Unset a previously configured optimal I/O size should the sanity checking
fail on subsequent revalidate attempts.

Link: https://lore.kernel.org/r/33fb522e-4f61-1b76-914f-c9e6a3553c9b@gmail.com
Cc: Bryan Gurney <bgurney@redhat.com>
Cc: <stable@vger.kernel.org>
Reported-by: Bernhard Sulzer <micraft.b@gmail.com>
Tested-by: Bernhard Sulzer <micraft.b@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-07 14:24:15 +02:00
..
aacraid
aic7xxx
aic94xx
arcmsr
arm
be2iscsi
bfa
bnx2fc
bnx2i
csiostor
cxgbi
cxlflash
device_handler
dpt
esas2r
fcoe
fnic
ibmvscsi
isci
libfc
libsas
lpfc
megaraid
mpt3sas
mvsas
osd
pcmcia
pm8001
qla2xxx
qla4xxx
snic
sym53c8xx_2
ufs
3w-9xxx.c
3w-9xxx.h
3w-sas.c
3w-sas.h
3w-xxxx.c
3w-xxxx.h
53c700_d.h_shipped
53c700.c
53c700.h
53c700.scr
a100u2w.c
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c
aha152x.c
aha152x.h
aha1542.c
aha1542.h
aha1740.c
aha1740.h
am53c974.c
atari_NCR5380.c
atari_scsi.c
atp870u.c
atp870u.h
BusLogic.c
BusLogic.h
bvme6000_scsi.c
ch.c
constants.c
dc395x.c
dc395x.h
dmx3191d.c
dpt_i2o.c
dpti.h
dtc.c
dtc.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_mmio.c
g_NCR5380.c
g_NCR5380.h
gdth_ioctl.h
gdth_proc.c
gdth_proc.h
gdth.c
gdth.h
gvp11.c
gvp11.h
hosts.c
hpsa_cmd.h
hpsa.c
hpsa.h
hptiop.c
hptiop.h
imm.c
imm.h
in2000.c
in2000.h
initio.c
initio.h
ipr.c
ipr.h
ips.c
ips.h
iscsi_boot_sysfs.c
iscsi_tcp.c
iscsi_tcp.h
jazz_esp.c
Kconfig
lasi700.c
libiscsi_tcp.c
libiscsi.c
mac_esp.c
mac_scsi.c
mac53c94.c
mac53c94.h
Makefile
megaraid.c
megaraid.h
mesh.c
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c
mvumi.h
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
ncr53c8xx.c
ncr53c8xx.h
NCR53c406a.c
NCR5380.c
NCR5380.h
nsp32_debug.c
nsp32_io.h
nsp32.c
nsp32.h
osst_detect.h
osst_options.h
osst.c
osst.h
pas16.c
pas16.h
pmcraid.c
pmcraid.h
ppa.c
ppa.h
ps3rom.c
qla1280.c
qla1280.h
qlogicfas.c
qlogicfas408.c
qlogicfas408.h
qlogicpti.c
qlogicpti.h
raid_class.c
script_asm.pl
scsi_common.c
scsi_debug.c
scsi_devinfo.c
scsi_dh.c
scsi_error.c
scsi_ioctl.c
scsi_lib_dma.c
scsi_lib.c
scsi_logging.c
scsi_logging.h
scsi_module.c
scsi_netlink.c
scsi_pm.c
scsi_priv.h
scsi_proc.c
scsi_sas_internal.h
scsi_scan.c
scsi_srpmb-teegris.c
scsi_srpmb.c
scsi_srpmb.h
scsi_sysctl.c
scsi_sysfs.c
scsi_trace.c
scsi_transport_api.h
scsi_transport_fc.c
scsi_transport_iscsi.c
scsi_transport_sas.c
scsi_transport_spi.c
scsi_transport_srp.c
scsi_typedefs.h
scsi.c
scsi.h
scsicam.c
sd_dif.c
sd.c
sd.h
ses.c
sg.c
sgiwd93.c
sim710.c
sni_53c710.c
sr_ioctl.c
sr_vendor.c
sr.c
sr.h
st_options.h
st.c
st.h
stex.c
storvsc_drv.c
sun_esp.c
sun3_scsi_vme.c
sun3_scsi.c
sun3_scsi.h
sun3x_esp.c
sym53c416.c
sym53c416.h
t128.c
t128.h
u14-34f.c
ultrastor.c
ultrastor.h
virtio_scsi.c
vmw_pvscsi.c
vmw_pvscsi.h
wd33c93.c
wd33c93.h
wd719x.c
wd719x.h
wd7000.c
xen-scsifront.c
zalon.c
zorro7xx.c