linux/drivers/mmc/core/Kconfig

#
# MMC core configuration
#

config MMC_UNSAFE_RESUME
	bool "Allow unsafe resume (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.
mmc: support unsafe resume of cards Since many have the system root on MMC/SD we must allow some foot shooting when it comes to resume. We cannot detect if a card is removed and reinserted during suspend, so the safe approach would be to assume it was, avoiding potential filesystem corruption. This will of course not work if you cannot release the card before suspend. This commit adds a compile time option that makes the MMC layer assume the card wasn't touched if it is redetected upon resume. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> 2007-05-01 14:00:02 +00:00			`#`
			`# MMC core configuration`
			`#`

			`config MMC_UNSAFE_RESUME`
			`bool "Allow unsafe resume (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.`