5.15-stable review patch. If anyone has any objections, please let me know.
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From: Romain Naour romain.naour@skf.com
commit c1472ec1dc4419d0bae663c1a1e6cb98dc7881ad upstream.
A bus_dma_limit was added for l3 bus by commit cfb5d65f2595 ("ARM: dts: dra7: Add bus_dma_limit for L3 bus") to fix an issue observed only with SATA on DRA7-EVM with 4GB RAM and CONFIG_ARM_LPAE enabled.
Since kernel 5.13, the SATA issue can be reproduced again following the SATA node move from L3 bus to L4_cfg in commit 8af15365a368 ("ARM: dts: Configure interconnect target module for dra7 sata").
Fix it by adding an empty dma-ranges property to l4_cfg and segment@100000 nodes (parent device tree node of SATA controller) to inherit the 2GB dma ranges limit from l3 bus node.
Note: A similar fix was applied for PCIe controller by commit 90d4d3f4ea45 ("ARM: dts: dra7: Fix bus_dma_limit for PCIe").
Fixes: 8af15365a368 ("ARM: dts: Configure interconnect target module for dra7 sata"). Link: https://lore.kernel.org/linux-omap/c583e1bb-f56b-4489-8012-ce742e85f233@smil... Cc: stable@vger.kernel.org # 5.13 Signed-off-by: Romain Naour romain.naour@skf.com Link: https://lore.kernel.org/r/20241115102537.1330300-1-romain.naour@smile.fr Signed-off-by: Kevin Hilman khilman@baylibre.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/boot/dts/dra7-l4.dtsi | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/arm/boot/dts/dra7-l4.dtsi +++ b/arch/arm/boot/dts/dra7-l4.dtsi @@ -12,6 +12,7 @@ ranges = <0x00000000 0x4a000000 0x100000>, /* segment 0 */ <0x00100000 0x4a100000 0x100000>, /* segment 1 */ <0x00200000 0x4a200000 0x100000>; /* segment 2 */ + dma-ranges;
segment@0 { /* 0x4a000000 */ compatible = "simple-pm-bus"; @@ -557,6 +558,7 @@ <0x0007e000 0x0017e000 0x001000>, /* ap 124 */ <0x00059000 0x00159000 0x001000>, /* ap 125 */ <0x0005a000 0x0015a000 0x001000>; /* ap 126 */ + dma-ranges;
target-module@2000 { /* 0x4a102000, ap 27 3c.0 */ compatible = "ti,sysc";