Re: [PATCH] drivers: regmap: bugfix in regcache-rbtree.c

Mark Brown
2013-08-21T14:08:41Z

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On Wed, Aug 21, 2013 at 03:14:23PM +0200, David Jander wrote:

> Here's the explanation:

> 1. If a driver initializes a regmap with a RB-tree cache, and starts writing to
> registers in some arbitrary order, you might get overlapping rbnodes:
> Suppose I have this rb-tree (a real case I happen to have):

> # cat /sys/kernel/debug/regmap/1-000a/rbtree
> 2-19 (24)
> 4-1b (24)

Like I say this isn't supposed to be the case in the first place, those
two nodes should be being merged - what we need to understand is where
the overlapping nodes came from.

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