tree 75d3aac76ba345c4a1035926d64a45ef37a5809e
parent bf604a4c44a91cc2ceb60d4643a091b6b32cc999
author Manfred Schlaegl <manfred.schlaegl@gmx.at> 1436561730 +0200
committer Jonathan Cameron <jic23@kernel.org> 1437310731 +0100

iio: mcp320x: Fix NULL pointer dereference

On reading in_voltage_scale of we got an NULL pointer dereference Oops.

The reason for this is, that mcp320x_read_raw tries to access
chip_info->resolution from struct mcp320x, but chip_info is never set.

chip_info was never set since the driver was added, but there was no
acute problem, because it was not referenced.
The acute problem exists since
b12206e917ac34bec41b9ff93d37d8bd53a2b3bc
iio: adc: mcp320x. Add support for more ADCs

This patch fixes the issue by setting chip_info in mcp320x_probe.

Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Reviewed-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>