Hi All,
I'm currently studying the suspension behavior of MMC. However, I
don't quite understand the rationale why the kernel needs to wait
until timeout in the following code:
/*
* If the host does not wait while the card signals busy, then we will
* will have to wait the sleep/awake timeout. Note, we cannot use the
* SEND_STATUS command to poll the status because that command (and most
* others) is invalid while the card sleeps.
*/
if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY)){
mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000));
}
Can anyone explain this to me?
Best,
Renju Liu
[email protected]
--------------------------------------------
"Renju is awesome!"
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