Messages in this thread | | | Date | Wed, 16 Nov 2011 18:15:31 +0100 | From | Lars-Peter Clausen <> | Subject | Re: [PATCH 5/7] regmap: Check if a register is writable instead of readable in regcache_read |
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On 11/16/2011 06:12 PM, Mark Brown wrote: > On Wed, Nov 16, 2011 at 06:09:06PM +0100, Lars-Peter Clausen wrote: >> On 11/16/2011 05:56 PM, Mark Brown wrote: > >>> No, really - just do something legible and robust. For example, teach >>> regmap_readable() about the cache. > >> Doesn't make much sense. We call regmap_readable from regcache_read, which >> is only called if we use a cache. So if we let regmap_readable return true >> in case we use a cache it will always be true in regcache_read and we can >> drop the check entirely. > > We should at least check that we actually have a cached value there - > the cache is sparse after all.
That's what the cache already does today, you recently change the rbtree implementation to return -ENOENT if there is no cached value.
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