[PATCH 4.5 144/200] scsi_dh: force modular build if SCSI is a module

[Greg Kroah-Hartman]

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@xxxxxxxx>

commit 0c994c03c926d26ce48e6bbabbbe60366044fcae upstream.

When the scsi_dh core was moved into the scsi core module,
CONFIG_SCSI_DH became a 'bool' option, and now anything depending on it
can be built-in even when CONFIG_SCSI=m. This of course cannot link
successfully:

drivers/scsi/built-in.o: In function `rdac_init':
scsi_dh_alua.c:(.init.text+0x14): undefined reference to `scsi_register_device_handler'
scsi_dh_alua.c:(.init.text+0x64): undefined reference to `scsi_unregister_device_handler'
drivers/scsi/built-in.o: In function `alua_init':
scsi_dh_alua.c:(.init.text+0xb0): undefined reference to `scsi_register_device_handler'

As a workaround, this adds an extra dependency on CONFIG_SCSI, so
Kconfig can figure out whether built-in is allowed or not.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 086b91d052eb ("scsi_dh: integrate into the core SCSI code")
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/scsi/device_handler/Kconfig |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/scsi/device_handler/Kconfig
+++ b/drivers/scsi/device_handler/Kconfig
@@ -13,13 +13,13 @@ menuconfig SCSI_DH
 
 config SCSI_DH_RDAC
 	tristate "LSI RDAC Device Handler"
-	depends on SCSI_DH
+	depends on SCSI_DH && SCSI
 	help
 	If you have a LSI RDAC select y. Otherwise, say N.
 
 config SCSI_DH_HP_SW
 	tristate "HP/COMPAQ MSA Device Handler"
-	depends on SCSI_DH
+	depends on SCSI_DH && SCSI
 	help
 	If you have a HP/COMPAQ MSA device that requires START_STOP to
 	be sent to start it and cannot upgrade the firmware then select y.
@@ -27,13 +27,13 @@ config SCSI_DH_HP_SW
 
 config SCSI_DH_EMC
 	tristate "EMC CLARiiON Device Handler"
-	depends on SCSI_DH
+	depends on SCSI_DH && SCSI
 	help
 	If you have a EMC CLARiiON select y. Otherwise, say N.
 
 config SCSI_DH_ALUA
 	tristate "SPC-3 ALUA Device Handler"
-	depends on SCSI_DH
+	depends on SCSI_DH && SCSI
 	help
 	  SCSI Device handler for generic SPC-3 Asymmetric Logical Unit
 	  Access (ALUA).