MSM_IOMMU doesn't play nice in multi-platform kernel This is causing probe issue as it tries to register unconditionally Specially experienced on tegra_drm where IOMMU support was enabled for tegra30 and later since 3.19. It has prevented the fallback to non-iommu in the tegra20 case. This need additionals "workaround" patches for EXYNOS, OMAP and Rockchip. v2 for thoses patches are reported at: http://lists.linuxfoundation.org/pipermail/iommu/2015-February/012226.html This config change and thoses additionals patches would need to be backported down to 3.19 fedora kernels --- config-armv7 | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/config-armv7 b/config-armv7 index 7f76e38..4e62e3a 100644 --- a/config-armv7 +++ b/config-armv7 @@ -356,7 +356,7 @@ CONFIG_PHY_QCOM_APQ8064_SATA=m CONFIG_PHY_QCOM_IPQ806X_SATA=m CONFIG_USB_DWC3_QCOM=m CONFIG_CRYPTO_DEV_QCE=m -CONFIG_MSM_IOMMU=y +# CONFIG_MSM_IOMMU is not set CONFIG_DRM_MSM=m CONFIG_DRM_MSM_FBDEV=y CONFIG_USB_EHCI_MSM=m -- 1.7.2.1