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12b827758f
of_dma_is_coherent() currently expects the architecture to be non-coherent and some devices being coherent getting marked as such with the dma-coherent devicetree property. For PowerPC CONFIG_OF_DMA_DEFAULT_COHERENT was added which currently makes of_dma_is_coherent() always return true but doesn't handle the case of the architecture being coherent but some devices not. So modify the function to also check for dma-noncoherent and set a suitable default return value. If CONFIG_OF_DMA_DEFAULT_COHERENT is set the value starts with true and finding dma-noncoherent will set it to false and without CONFIG_OF_DMA_DEFAULT_COHERENT, the behaviour is reversed. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Guo Ren <guoren@kernel.org> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220706231536.2041855-2-heiko@sntech.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> |
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.. | ||
unittest-data | ||
address.c | ||
base.c | ||
device.c | ||
dynamic.c | ||
fdt_address.c | ||
fdt.c | ||
irq.c | ||
Kconfig | ||
kexec.c | ||
kobj.c | ||
Makefile | ||
of_numa.c | ||
of_private.h | ||
of_reserved_mem.c | ||
overlay.c | ||
pdt.c | ||
platform.c | ||
property.c | ||
resolver.c | ||
unittest.c |