mmc: Add helper function to check if a card is removable
commit71d7d3d190fe77588269a8febf93cd739bd91eb3
authorMatt Fleming <matt@console-pimps.org>
Mon, 27 Sep 2010 08:42:19 +0000 (27 09:42 +0100)
committerChris Ball <cjb@laptop.org>
Sat, 23 Oct 2010 13:11:15 +0000 (23 21:11 +0800)
tree32aa0d033c40c38327a704e2cad0fc61e2dd86ae
parentd3c502b84f734b36abdc9d11ec61f00016e98d33
mmc: Add helper function to check if a card is removable

There are two checks that need to be made when determining whether a
card is removable. A host controller may set MMC_CAP_NONREMOVABLE if the
controller does not support removing cards (e.g. eMMC), in which case
the card is physically non-removable. Also the 'mmc_assume_removable'
module parameter can be configured at module load time, in which case
the card may be logically non-removable.

A helper function keeps the logic in one place so that code always
checks both conditions.

Because this new function is likely to be called from modules we now
need to export the mmc_assume_removable symbol.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
drivers/mmc/core/core.c
drivers/mmc/core/core.h
drivers/mmc/core/mmc.c
drivers/mmc/core/sd.c
include/linux/mmc/host.h