caif-driver: add HAS_DMA dependency

Fix this error on an s390 allyesconfig build:

linux-2.6/drivers/net/caif/caif_spi.c:98:
    undefined reference to `dma_free_coherent'

Cc: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/caif/Kconfig b/drivers/net/caif/Kconfig
index 631a624..75bfc3a 100644 (file)
--- a/drivers/net/caif/Kconfig
+++ b/drivers/net/caif/Kconfig
@@ -15,7 +15,7 @@ config CAIF_TTY
 
 config CAIF_SPI_SLAVE
        tristate "CAIF SPI transport driver for slave interface"
-       depends on CAIF
+       depends on CAIF && HAS_DMA
        default n
        ---help---
        The CAIF Link layer SPI Protocol driver for Slave SPI interface.