linux_dsm_epyc7002/Documentation/scsi
Seymour, Shane M d9b43a10f0 st: allow debug output to be enabled or disabled via sysfs
Change st driver to allow enabling or disabling debug output
via sysfs file /sys/bus/scsi/drivers/st/debug_flag.

Previously the only way to enable debug output was:

1. loading the driver with the module parameter debug_flag=1
2. an ioctl call (this method was also the only way to dynamically
disable debug output).

To use the ioctl you need a second tape drive (if you are
actively testing the first tape drive) since a second process
cannot open the first tape drive if it is in use.

The this change is only functional if the value of the macro
DEBUG in st.c is a non-zero value (which it is by default).

Signed-off-by: Shane Seymour <shane.seymour@hpe.com>
Reviewed-by: Laurence Oberman <oberman.l@gmail.com>
Acked-by: Kai Mäkisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-11-09 17:17:27 -08:00
..
scsi_transport_srp
00-INDEX
53c700.txt
aacraid.txt
advansys.txt
aha152x.txt
aic7xxx.txt
aic79xx.txt
arcmsr_spec.txt
bfa.txt
bnx2fc.txt
BusLogic.txt
ChangeLog.1992-1997
ChangeLog.arcmsr
ChangeLog.ips
ChangeLog.lpfc
ChangeLog.megaraid
ChangeLog.megaraid_sas
ChangeLog.ncr53c8xx
ChangeLog.sym53c8xx
ChangeLog.sym53c8xx_2
cxgb3i.txt
dc395x.txt
dpti.txt
dtc3x80.txt
FlashPoint.txt
g_NCR5380.txt
hpsa.txt
hptiop.txt
in2000.txt
libsas.txt
LICENSE.FlashPoint
LICENSE.qla2xxx
LICENSE.qla4xxx
link_power_management_policy.txt
lpfc.txt
megaraid.txt
Mylex.txt
ncr53c8xx.txt
NinjaSCSI.txt
osd.txt
osst.txt
ppa.txt
qlogicfas.txt
scsi_eh.txt
scsi_fc_transport.txt
scsi_mid_low_api.txt
scsi-changer.txt
scsi-generic.txt
scsi-parameters.txt
scsi.txt
st.txt
sym53c8xx_2.txt
sym53c500_cs.txt
tmscsim.txt
ufs.txt
wd719x.txt