[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>
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 6e8106a..759e150 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -191,20 +191,19 @@
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)"