regmap: Fix possible shift overflow in regmap_field_init()

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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

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Maxime Coquelin 2015-06-16 13:53:19 +02:00 • committed by Mark Brown

parent b787f68c36

commit 921cc29473

1 changed files with 1 additions and 2 deletions

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drivers/base/regmap/regmap.c

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