Santosh Shilimkar <[email protected]> writes:
[...]
>>
>> The SD card gets suspended, but nothing else seems to happen, and I
>> can't resume the system.
>>
>> Am I doing something wrong?
>>
> MMC suspend is broken. I use ramdisk-ext3 or NFS for my testing
>
Just to clarify, MMC suspend is not broken. It's a "feature" the MMC
core. See the help text of the following Kconfig option, and ensure
that it's enabled:
config MMC_UNSAFE_RESUME
bool "Assume MMC/SD cards are non-removable (DANGEROUS)"
help
If you say Y here, the MMC layer will assume that all cards
stayed in their respective slots during the suspend. The
normal behaviour is to remove them at suspend and
redetecting them at resume. Breaking this assumption will
in most cases result in data corruption.
This option is usually just for embedded systems which use
a MMC/SD card for rootfs. Most people should say N here.
This option sets a default which can be overridden by the
module parameter "removable=0" or "removable=1".
Looking at Dave's .config, this option is disabled, so suspend will hang
when rootfs is on MMC.
Kevin
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