ufs-exynos driver enables the shareability option for gs101 which means the descriptors need to be allocated as cacheable. Fix the DT node and update bindings to add the dma-coherent property. This fixes the UFS stability issues we have seen with the upstream UFS driver. Note this DT fix can go in independently of the other UFS fixes series I sent recently [1], as the bootloader already leaves the sharability bits enabled. regards, Peter [1] https://lore.kernel.org/linux-scsi/20250226220414.343659-1-peter.griffin@xxxxxxxxxx/ To: André Draszik <andre.draszik@xxxxxxxxxx> To: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx> To: Rob Herring <robh@xxxxxxxxxx> To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx> To: Conor Dooley <conor+dt@xxxxxxxxxx> To: Alim Akhtar <alim.akhtar@xxxxxxxxxxx> To: Avri Altman <avri.altman@xxxxxxx> To: Bart Van Assche <bvanassche@xxxxxxx> To: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: linux-samsung-soc@xxxxxxxxxxxxxxx Cc: devicetree@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: linux-scsi@xxxxxxxxxxxxxxx Cc: kernel-team@xxxxxxxxxxx Cc: willmcvicker@xxxxxxxxxx Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx> --- Peter Griffin (2): arm64: dts: exynos: gs101: ufs: add dma-coherent property scsi: ufs: dt-bindings: exynos: add dma-coherent property for gs101 Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml | 2 ++ arch/arm64/boot/dts/exynos/google/gs101.dtsi | 1 + 2 files changed, 3 insertions(+) --- base-commit: b323d8e7bc03d27dec646bfdccb7d1a92411f189 change-id: 20250314-ufs-dma-coherent-980f2467690d Best regards, -- Peter Griffin <peter.griffin@xxxxxxxxxx>
