Messages in this thread | | | Date | Fri, 13 Jan 2012 17:51:09 +0400 | From | Dmitry Antipov <> | Subject | Re: [PATCH] mmc: use usleep_range() in mmc_delay() |
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On 01/13/2012 05:22 PM, Aaro Koskinen wrote:
> Anyway, I think the change is good. On systems with multiple MMC devices > the boot/probe can spend 100-200 ms alone just doing busylooping delays. I > think e.g. in mmc_rescan() the code uses frequently mmc_delay(10).
I'm worrying about this:
mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000))
since I have no ideas about typical values for this timeout. If it may be too small (<=10 us), using usleep_range() makes no sense.
Dmitry
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