[PATCH v2 0/5] ARM: omap[34]: Thumb-2 compatibility fixes

[Kevin Hilman]

Santosh Shilimkar <santosh.shilimkar at ti.com> 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