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iio: adc: mcp3911: fix sizeof() vs ARRAY_SIZE() bug

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This code uses sizeof() instead of ARRAY_SIZE() so it reads beyond the
end of the mcp3911_osr_table[] array.

Fixes: 6d965885f4 ("iio: adc: mcp3911: add support for oversampling ratio")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/YzFsjY3xLHUQMjVr@kili
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Dan Carpenter 2022-09-26 12:10:37 +03:00 committed by Jonathan Cameron
parent 0dec4d2f26
commit 7578847b59
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/mcp3911.c
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@ -248,7 +248,7 @@ static int mcp3911_write_raw(struct iio_dev *indio_dev,
break;
case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
for (int i = 0; i < sizeof(mcp3911_osr_table); i++) {
for (int i = 0; i < ARRAY_SIZE(mcp3911_osr_table); i++) {
if (val == mcp3911_osr_table[i]) {
val = FIELD_PREP(MCP3911_CONFIG_OSR, i);
ret = mcp3911_update(adc, MCP3911_REG_CONFIG, MCP3911_CONFIG_OSR,