mmc: sdhci-acpi: Fix device hang on Intel BayTrail
Intel Baytrail has been observed sometimes to hang
if host controllers are using DMA while deep C-states
are used. Workaround that by specifying a maximum
DMA latency that will prevent deep C-states.
Same problem, i've see a patch in the android kernel git that is related to this problem: git.android- x86.org/ ?p=kernel/ common. git;a=commit; h=df2f12ff0c798 5e1164ac197623c cb32e761ccc7
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mmc: sdhci-acpi: Fix device hang on Intel BayTrail
Intel Baytrail has been observed sometimes to hang
if host controllers are using DMA while deep C-states
are used. Workaround that by specifying a maximum
DMA latency that will prevent deep C-states.