Messages in this thread | | | Date | Fri, 13 Jan 2012 16:52:16 +0200 (EET) | From | Aaro Koskinen <> | Subject | Re: [PATCH] mmc: use usleep_range() in mmc_delay() |
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Hi,
On Fri, 13 Jan 2012, Dmitry Antipov wrote: > 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.
Hmm, but the code above is rounding it up to at least 1 ms?
A.
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