tree b5d577496add5052fa5facd1c969d9df93251236
parent b787f68c36d49bb1d9236f403813641efa74a031
author Maxime Coquelin <maxime.coquelin@st.com> 1434455599 +0200
committer Mark Brown <broonie@kernel.org> 1434455902 +0100

regmap: Fix possible shift overflow in regmap_field_init()

The way the mask is generated in regmap_field_init() is wrong.
Indeed, a field initialized with msb = 31 and lsb = 0 provokes a shift
overflow while calculating the mask field.

On some 32 bits architectures, such as x86, the generated mask is 0,
instead of the expected 0xffffffff.

This patch uses GENMASK() to fix the problem, as this macro is already safe
regarding shift overflow.

Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org