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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2020-10-16 12:08:33 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-11-11 07:45:35 +0300 |
| commit | 77e9c198b1558f51092eaaaed59ec68a552f990e (patch) | |
| tree | 4263414b2e5e0fa0651d50c6fcd52bce966446f0 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | ef9a5d188d663753e73a3c8e8910ceab8e9305c4 (diff) | |
| download | linux-77e9c198b1558f51092eaaaed59ec68a552f990e.tar.xz | |
arm64: dts: qcom: clear the warnings caused by empty dma-ranges
The scripts/dtc/checks.c requires that the node have empty "dma-ranges"
property must have the same "#address-cells" and "#size-cells" values as
the parent node. Otherwise, the following warnings is reported:
arch/arm64/boot/dts/qcom/ipq6018.dtsi:185.3-14: Warning \
(dma_ranges_format): /soc:dma-ranges: empty "dma-ranges" property but \
its #address-cells (1) differs from / (2)
arch/arm64/boot/dts/qcom/ipq6018.dtsi:185.3-14: Warning \
(dma_ranges_format): /soc:dma-ranges: empty "dma-ranges" property but \
its #size-cells (1) differs from / (2)
Arnd Bergmann figured out why it's necessary:
Also note that the #address-cells=<1> means that any device under
this bus is assumed to only support 32-bit addressing, and DMA will
have to go through a slow swiotlb in the absence of an IOMMU.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20201016090833.1892-3-thunder.leizhen@huawei.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions