On Thu, Feb 10, 2011 at 9:38 PM, Kevin Hilman <khilman@xxxxxx> wrote: > Santosh Shilimkar <santosh.shilimkar@xxxxxx> 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. Thanks for the clarification. For simplicity, and since Thumb-2 should be unrelated to the MMC subsystem, I've been testing suspend from the initramfs instead ... which sidesteps the MMC issue. Power-off-suspend does still have some weird problems when CONFIG_THUMB2_KERNEL is enabled; I'm still investigating this. Cheers ---Dave -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
