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SubjectRe: regcache_sync() errors for read-only registers cache
On Fri, Feb 27, 2015 at 01:59:30PM +0100, Takashi Iwai wrote:

> A quick fix is the patch like below, but obviously it doesn't cover
> the all cases but only addresses the signle rw.

Please don't bury patches in the middle of mails, that just means that
if the patch is useful it's painful to apply. Your patch seems fine but
can you please resend in a directly applyable format unless something in
the below indicates against that...

> Also, _regmap_write() itself calls again regmap_writeable(), so it's
> superfluous. Alternatively, we may check -EIO from _regmap_write()
> and treat as a special case not to show the error. Or, add a
> parameter to skip regmap_writeable() call.

I'm sorry but I can't parse the above - what is "it" in this context?
Silently ignoring -EIO from the physical register write sounds like a
very bad idea though, that seems likely to discard actual errors.
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