bsg: Kconfig updates

- add the detailed explanation. - remove 'default y'. - make 'EXPERIMENTAL' keyword visible to the user in menu. Signed-off-by: FUJITA Tomonori <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ambv · Jul 17, 2007 · 319a7b7 · 319a7b7
1 parent 0ed081c
commit 319a7b7
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/block/Kconfig b/block/Kconfig
@@ -52,11 +52,16 @@ config LSF
 endif # BLOCK
 
 config BLK_DEV_BSG
-	bool "Block layer SG support"
+	bool "Block layer SG support v4 (EXPERIMENTAL)"
 	depends on (SCSI=y) && EXPERIMENTAL
-	default y
 	---help---
-	Saying Y here will enable generic SG (SCSI generic) v4
-	support for any block device.
+	Saying Y here will enable generic SG (SCSI generic) v4 support
+	for any block device.
+
+	Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
+	can handle complicated SCSI commands: tagged variable length cdbs
+	with bidirectional data transfers and generic request/response
+	protocols (e.g. Task Management Functions and SMP in Serial
+	Attached SCSI).
 
 source block/Kconfig.iosched