From: Mark Brown <broonie@kernel.org>
Date: Sat, 19 Sep 2015 14:00:18 +0000 (-0700)
Subject: regmap: debugfs: Ensure we don't underflow when printing access masks
X-Git-Tag: v3.2.73~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9bd8029559877940f3f3b436f635794120ea3b2b;p=pandora-kernel.git

regmap: debugfs: Ensure we don't underflow when printing access masks

commit b763ec17ac762470eec5be8ebcc43e4f8b2c2b82 upstream.

If a read is attempted which is smaller than the line length then we may
underflow the subtraction we're doing with the unsigned size_t type so
move some of the calculation to be additions on the right hand side
instead in order to avoid this.

Reported-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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