Enabling TEGRA186_GPC_DMA will cause this build failure unless some other DMA driver which uses DMA_VIRTUAL_CHANNELS is enabled: ERROR: modpost: "vchan_dma_desc_free_list" [drivers/dma/tegra186-gpc-dma.ko] undefined! ERROR: modpost: "vchan_init" [drivers/dma/tegra186-gpc-dma.ko] undefined! ERROR: modpost: "vchan_tx_submit" [drivers/dma/tegra186-gpc-dma.ko] undefined! ERROR: modpost: "vchan_tx_desc_free" [drivers/dma/tegra186-gpc-dma.ko] undefined! ERROR: modpost: "vchan_find_desc" [drivers/dma/tegra186-gpc-dma.ko] undefined! make[1]: *** [scripts/Makefile.modpost:136: Module.symvers] Error 1 Add an explicit select of DMA_VIRTUAL_CHANNELS to avoid this. Signed-off-by: Mark Salter <msalter@xxxxxxxxxx> --- drivers/dma/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index fb7073fc034f..f5f422f9b850 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -623,6 +623,7 @@ config TEGRA186_GPC_DMA depends on (ARCH_TEGRA || COMPILE_TEST) && ARCH_DMA_ADDR_T_64BIT depends on IOMMU_API select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS help Support for the NVIDIA Tegra General Purpose Central DMA controller. The DMA controller has multiple DMA channels which can be configured -- 2.39.2
