[SCSI] Update wording of CONFIG_SCSI_MULTI_LUN help

I had to set CONFIG_SCSI_MULTI_LUN to y in order to get my SE W595
working when plugging it as a mass storage. Looking at SCSI option to
get a phone behaving correctly was convoluted to say the least. There
are quite a few other reports about USB card readers needing this option
as well. This patch improves the help text to make the use of the option
more obvious.

Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 9 insertions, 10 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 6e8106a70b3d..759e1507e63c 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -191,20 +191,19 @@ config SCSI_ENCLOSURE
           it has an enclosure device.  Selecting this option will just allow
           certain enclosure conditions to be reported and is not required.
 
-comment "Some SCSI devices (e.g. CD jukebox) support multiple LUNs"
-        depends on SCSI
-
 config SCSI_MULTI_LUN
         bool "Probe all LUNs on each SCSI device"
         depends on SCSI
         help
-          If you have a SCSI device that supports more than one LUN (Logical
-          Unit Number), e.g. a CD jukebox, and only one LUN is detected, you
-          can say Y here to force the SCSI driver to probe for multiple LUNs.
-          A SCSI device with multiple LUNs acts logically like multiple SCSI
-          devices. The vast majority of SCSI devices have only one LUN, and
-          so most people can say N here. The max_luns boot/module parameter 
-          allows to override this setting.
+          Some devices support more than one LUN (Logical Unit Number) in order
+          to allow access to several media, e.g. CD jukebox, USB card reader,
+          mobile phone in mass storage mode. This option forces the kernel to
+          probe for all LUNs by default. This setting can be overriden by
+          max_luns boot/module parameter. Note that this option does not affect
+          devices conforming to SCSI-3 or higher as they can explicitely report
+          their number of LUNs. It is safe to say Y here unless you have one of
+          those rare devices which reacts in an unexpected way when probed for
+          multiple LUNs.
 
 config SCSI_CONSTANTS
         bool "Verbose SCSI error reporting (kernel size +=12K)"