staging: iio: ad5933: avoid uninitialized variable in error case

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The ad5933_i2c_read function returns an error code to indicate
whether it could read data or not. However ad5933_work() ignores
this return code and just accesses the data unconditionally,
which gets detected by gcc as a possible bug:

drivers/staging/iio/impedance-analyzer/ad5933.c: In function 'ad5933_work':
drivers/staging/iio/impedance-analyzer/ad5933.c:649:16: warning: 'status' may be used uninitialized in this function [-Wmaybe-uninitialized]

This adds minimal error handling so we only evaluate the
data if it was correctly read.

Link: https://patchwork.kernel.org/patch/8110281/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Arnd Bergmann 2016-10-24 17:22:01 +02:00 • committed by Greg Kroah-Hartman

parent fb26718744

commit b8fd722075

1 changed files with 10 additions and 7 deletions

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drivers/staging/iio/impedance-analyzer/ad5933.c

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