diff options
| author | Manfred Schlaegl <manfred.schlaegl@gmx.at> | 2015-07-10 20:55:30 (GMT) |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-07-19 12:58:51 (GMT) |
| commit | 41be6a0d5aa3c4fcb472f3d44251683b085b00a3 (patch) | |
| tree | 75d3aac76ba345c4a1035926d64a45ef37a5809e /drivers/iio/adc/mcp320x.c | |
| parent | bf604a4c44a91cc2ceb60d4643a091b6b32cc999 (diff) | |
| download | linux-41be6a0d5aa3c4fcb472f3d44251683b085b00a3.tar.xz | |
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>
Diffstat (limited to 'drivers/iio/adc/mcp320x.c')
| -rw-r--r-- | drivers/iio/adc/mcp320x.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c index 8d9c9b9..d819823 100644 --- a/drivers/iio/adc/mcp320x.c +++ b/drivers/iio/adc/mcp320x.c @@ -299,6 +299,8 @@ static int mcp320x_probe(struct spi_device *spi) indio_dev->channels = chip_info->channels; indio_dev->num_channels = chip_info->num_channels; + adc->chip_info = chip_info; + adc->transfer[0].tx_buf = &adc->tx_buf; adc->transfer[0].len = sizeof(adc->tx_buf); adc->transfer[1].rx_buf = adc->rx_buf; |