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iio: ak8975: fix maybe-uninitialized warning

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commit 05be8d4101 upstream.

If i2c_device_id *id is NULL and acpi_match_device returns NULL too,
then chipset may be unitialized when accessing &ak_def_array[chipset] in
ak8975_probe. Therefore initialize chipset to AK_MAX_TYPE, which will
return an error when not changed.

This patch fixes the following maybe-uninitialized warning:

drivers/iio/magnetometer/ak8975.c: In function ‘ak8975_probe’:
drivers/iio/magnetometer/ak8975.c:788:14: warning: ‘chipset’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
  data->def = &ak_def_array[chipset];

Signed-off-by: Richard Leitner <dev@g0hl1n.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Leitner 2016-04-05 15:03:48 +02:00 committed by Greg Kroah-Hartman
parent d3cd04a8a9
commit 0f5c3afc75
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/magnetometer/ak8975.c
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@ -732,7 +732,7 @@ static int ak8975_probe(struct i2c_client *client,
int eoc_gpio;
int err;
const char *name = NULL;
enum asahi_compass_chipset chipset;
enum asahi_compass_chipset chipset = AK_MAX_TYPE;
/* Grab and set up the supplied GPIO. */
if (client->dev.platform_data)