tree 686ede6c3d3404102019913178d4a0a501c299ec
parent c7f15d43a5c59c6cedb438e02032060558303589
author Roger Tseng <rogerable@realtek.com> 1421834961 +0800
committer Lee Jones <lee.jones@linaro.org> 1421942882 +0000

mfd: rtsx_usb: Defer autosuspend while card exists

A card insertion happens after the lastest polling before reader is
suspended may never have a chance to be detected. Under current 1-HZ
polling interval setting in mmc_core, the worst case of such
undetectablility is about 1 second.

To further reduce the undetectability, detect card slot again in suspend
method and defer the autosuspend if the slot is loaded. The default 2
second autosuspend delay of USB subsystem should let the next polling
detects the card.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>