scsi: ufs: exynos: Disable iocc if dma-coherent property isn't set

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[ Upstream commit f92bb74368 ]

If dma-coherent property isn't set then descriptors are non-cacheable
and the iocc shareability bits should be disabled. Without this UFS can
end up in an incompatible configuration and suffer from random cache
related stability issues.

Suggested-by: Bart Van Assche <bvanassche@acm.org>
Fixes: cc52e15397 ("scsi: ufs: ufs-exynos: Support ExynosAuto v9 UFS")
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20250319-exynos-ufs-stability-fixes-v2-3-96722cc2ba1b@linaro.org
Cc: Chanho Park <chanho61.park@samsung.com>
Cc: stable@vger.kernel.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Peter Griffin 2025-03-19 15:30:20 +00:00 • committed by Greg Kroah-Hartman

parent 56f3327cdd

commit 869749e481

2 changed files with 15 additions and 5 deletions

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17

drivers/ufs/host/ufs-exynos.c

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3

drivers/ufs/host/ufs-exynos.h

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