mfd: rtsx_usb: Defer autosuspend while card exists

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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>

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Roger Tseng 2015-01-21 18:09:21 +08:00 • committed by Lee Jones

parent c7f15d43a5

commit bb400d2120

1 changed files with 18 additions and 0 deletions

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drivers/mfd/rtsx_usb.c

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