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iio: adc: ad_sigma_delta: don't overallocate scan buffer

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[ Upstream commit 5a2f15c5a8e017d0951e6dc62aa7b5b634f56881 ]

Fix overallocating the size of the scan buffer by converting bits to
bytes. The size is meant to be in bytes, so scanbits needs to be
divided by 8.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250701-iio-adc-ad7173-add-spi-offload-support-v3-1-42abb83e3dac@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Lechner
2025-07-01 16:37:49 -05:00
committed by Greg Kroah-Hartman
parent 0a4757bf98
commit 3c3454b02c
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ad_sigma_delta.c
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@@ -378,7 +378,7 @@ static int ad_sd_buffer_postenable(struct iio_dev *indio_dev)
return ret;
}
samples_buf_size = ALIGN(slot * indio_dev->channels[0].scan_type.storagebits, 8);
samples_buf_size = ALIGN(slot * indio_dev->channels[0].scan_type.storagebits / 8, 8);
samples_buf_size += sizeof(int64_t);
samples_buf = devm_krealloc(&sigma_delta->spi->dev, sigma_delta->samples_buf,
samples_buf_size, GFP_KERNEL);