[PATCH v2] scsi: advansys needs ISA dma api for ISA support

[Arnd Bergmann]

The advansys drvier uses the request_dma function that is used on ISA
machines for the internal DMA controller, which causes build errors
on platforms that have ISA slots but do not provide the ISA DMA API:

drivers/scsi/advansys.c: In function 'advansys_board_found':
drivers/scsi/advansys.c:11300:10: error: implicit declaration of function 'request_dma' [-Werror=implicit-function-declaration]

The problem now showed up in ARM randconfig builds after commit
6571fb3f8b7f ("advansys: Update to version 3.5 and remove compilation
warning") made it possible to build on platforms that have neither
VIRT_TO_BUS nor ISA_DMA_API but that do have ISA.

This adds a dependency to only build the driver on ISA based machines
if they also support ISA_DMA_API, or if they EISA or PCI are also
enabled.

Signed-off-by: Arnd Bergmann <arnd at arndb.de>

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index d2f480b04a52..1d8b8257773d 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -498,7 +498,7 @@ config SCSI_DPT_I2O
 config SCSI_ADVANSYS
 	tristate "AdvanSys SCSI support"
 	depends on SCSI
-	depends on ISA || EISA || PCI
+	depends on (ISA && ISA_DMA_API) || EISA || PCI
 	help
 	  This is a driver for all SCSI host adapters manufactured by
 	  AdvanSys. It is documented in the kernel source in