iio: hid-sensor-magn-3d: Scan for usage attributes before setting up iio channels

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Scan for and count the HID usage attributes supported by the driver.
This allows for the driver to only setup the IIO channels for the
sensor usages present in the HID USB reports.

Changes from v5
-Fixed kernel panic from invalid pointer dereference
-Fixed variable assignment style

Signed-off-by: Reyad Attiyat <reyad.attiyat@gmail.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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Reyad Attiyat 2014-07-17 19:18:00 +01:00 • committed by Jonathan Cameron

parent 11b8ddab81

commit 2a96540a5c

1 changed files with 105 additions and 44 deletions

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drivers/iio/magnetometer/hid-sensor-magn-3d.c

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