[SCSI] Improve SCSI_LOGGING Kconfig entry

The Kconfig entry for SCSI_LOGGING refers the reader to
drivers/scsi/scsi.c, but I didn't find any useful information
there. There is certainly logging code in that file, but the
logging types and logging levels are described in
drivers/scsi/scsi_logging.h.

Also, the procfs file referred to in the section is incorrect.
It should be /proc/sys/dev/scsi/logging_level and not
/proc/scsi/scsi.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 898c2b59592b..601c2a8ec242 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -224,14 +224,15 @@ config SCSI_LOGGING
           can enable logging by saying Y to "/proc file system support" and
           "Sysctl support" below and executing the command
 
-          echo "scsi log token [level]" > /proc/scsi/scsi
+          echo <bitmask> > /proc/sys/dev/scsi/logging_level
 
-          at boot time after the /proc file system has been mounted.
+          where <bitmask> is a four byte value representing the logging type
+          and logging level for each type of logging selected.
 
-          There are a number of things that can be used for 'token' (you can
-          find them in the source: <file:drivers/scsi/scsi.c>), and this
-          allows you to select the types of information you want, and the
-          level allows you to select the level of verbosity.
+          There are a number of logging types and you can find them in the
+          source at <file:drivers/scsi/scsi_logging.h>. The logging levels
+          are also described in that file and they determine the verbosity of
+          the logging for each logging type.
 
           If you say N here, it may be harder to track down some types of SCSI
           problems. If you say Y here your kernel will be somewhat larger, but