Messages in this thread | | | From | Saravana Kannan <> | Date | Tue, 25 Jan 2022 19:45:40 -0800 | Subject | Relation between MMC_CAP_WAIT_WHILE_BUSY and card_busy() |
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I'm trying to understand the MMC suspend path a bit.
I looked at the commit message of 6fa79651cc808f68db6f6f297be5a950ccd5dffb.
IIUC, if MMC_CAP_WAIT_WHILE_BUSY is set then the mmc framework is going to depend on the card_busy() op to ensure correctness instead of using the S_A_TIMEOUT value from the card.
But I see a lot of mmc host drivers that implement card_busy() but don't set the MMC_CAP_WAIT_WHILE_BUSY flag. That doesn't seem right to me if my understanding is correct.
If it's supposed to be "we'll use card_busy() if MMC_CAP_WAIT_WHILE_BUSY isn't set", then why do we have some mmc host drivers that have both?
What am I misunderstanding?
-Saravana
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