From ef4815ab1ff10d642c21ef92faa6544934bc78d1 Mon Sep 17 00:00:00 2001 From: Martin Hostettler Date: Thu, 24 Feb 2011 12:51:31 -0800 Subject: [PATCH] omap: iommu: Gracefully fail iommu_enable if no arch_iommu is registered In a modular build of the iommu code it's possible that the arch iommu code isn't loaded when trying to enable the iommu. Instead of blindly following a null pointer return -NODEV in that case. Signed-off-by: Martin Hostettler Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c index b1107c08da5..3d8f55ea866 100644 --- a/arch/arm/plat-omap/iommu.c +++ b/arch/arm/plat-omap/iommu.c @@ -104,6 +104,9 @@ static int iommu_enable(struct iommu *obj) if (!obj) return -EINVAL; + if (!arch_iommu) + return -ENODEV; + clk_enable(obj->clk); err = arch_iommu->enable(obj);