ARM i.MX DMA: return gracefully on different socs

Code called from an initcall can be maybe called for
machines it's not intended for. So check for valid
machines and return gracefully if an incompatible machine
is found.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-imx/dma-v1.c b/arch/arm/mach-imx/dma-v1.c
index 3e8c47c63bac6bb3556c5b74e90c9def1b66e4c5..dcb24a90998c711abcb11fb84bdab1248a0c836a 100644 (file)
--- a/arch/arm/mach-imx/dma-v1.c
+++ b/arch/arm/mach-imx/dma-v1.c
@@ -818,7 +818,7 @@ static int __init imx_dma_init(void)
                imx_dmav1_baseaddr = MX27_IO_ADDRESS(MX27_DMA_BASE_ADDR);
        else
 #endif
-               BUG();
+               return 0;
 
        dma_clk = clk_get(NULL, "dma");
        clk_enable(dma_clk);