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* [PATCH edk2-platforms 1/1] Platform/DeveloperBox: drop dma-ranges property from DT root node
@ 2020-02-21 16:29 Ard Biesheuvel
  2020-03-06 10:39 ` Ard Biesheuvel
  2020-03-06 12:58 ` Leif Lindholm
  0 siblings, 2 replies; 4+ messages in thread
From: Ard Biesheuvel @ 2020-02-21 16:29 UTC (permalink / raw)
  To: devel; +Cc: leif, Ard Biesheuvel

The dma-ranges DT property describes the DMA translation between a
parent bus and its children, and so having a dma-ranges property in
the root node makes little sense, but it doesn't harm either.

However, recent kernels (v5.5+) have started spewing warnings into
the kernel log of the following nature:

  OF: translation of DMA address(0) to CPU address failed node(/uart@2a400000)
  OF: translation of DMA address(0) to CPU address failed node(/pmu)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@70000000)
  OF: translation of DMA address(0) to CPU address failed node(/uart@51040000)
  OF: translation of DMA address(0) to CPU address failed node(/gpio@51000000)
  OF: translation of DMA address(0) to CPU address failed node(/i2c@51210000)
  OF: translation of DMA address(0) to CPU address failed node(/gpio-keys)
  OF: translation of DMA address(0) to CPU address failed node(/tpm_tis@10000000)
  OF: translation of DMA address(0) to CPU address failed node(/sdhci@52300000)
  OF: translation of DMA address(0) to CPU address failed node(/ethernet@522d0000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
  OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)

and so we should probably get rid of this bogus dma-ranges property.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi b/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
index afb9e2c779df..2ee3821fca0b 100644
--- a/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
+++ b/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
@@ -21,7 +21,6 @@
     #address-cells = <2>;
     #size-cells = <2>;
     interrupt-parent = <&gic>;
-    dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x0>;
 
     aliases {
         serial0 = &soc_uart0;
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-03-06 16:42 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2020-02-21 16:29 [PATCH edk2-platforms 1/1] Platform/DeveloperBox: drop dma-ranges property from DT root node Ard Biesheuvel
2020-03-06 10:39 ` Ard Biesheuvel
2020-03-06 12:58 ` Leif Lindholm
2020-03-06 16:42   ` Ard Biesheuvel

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