Messages in this thread Patch in this message | | | From | Christoph Hellwig <> | Subject | [PATCH 09/10] sh: don't allow non-coherent DMA for NOMMU | Date | Tue, 24 Mar 2020 17:26:32 +0100 |
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The code handling non-coherent DMA depends on being able to remap code as non-cached. But that can't be done without an MMU, so using this option on NOMMU builds is broken.
Signed-off-by: Christoph Hellwig <hch@lst.de> --- arch/sh/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 808b638b11f3..b97d9712c252 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -48,6 +48,7 @@ config SUPERH select MAY_HAVE_SPARSE_IRQ select MODULES_USE_ELF_RELA select NEED_SG_DMA_LENGTH + select NO_DMA if !MMU && !DMA_COHERENT select NO_GENERIC_PCI_IOPORT_MAP if PCI select OLD_SIGACTION select OLD_SIGSUSPEND @@ -155,7 +156,7 @@ config DMA_COHERENT bool config DMA_NONCOHERENT - def_bool !DMA_COHERENT + def_bool !NO_DMA && !DMA_COHERENT select ARCH_HAS_SYNC_DMA_FOR_DEVICE config PGTABLE_LEVELS -- 2.25.1
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