From: Jonathan Cameron Jonathan.Cameron@huawei.com
stable inclusion from stable-5.10.50 commit c61ac1f83b3246d895a63d60ac68d6c2781b8672 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit f4ca2e2595d9fee65d5ce0d218b22ce00e5b2915 ]
To make code more readable, use a structure to express the channel layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of uses of iio_push_to_buffers_with_timestamp()
Fixes: 0d96d5ead3f7 ("iio: humidity: Add triggered buffer support for AM2315") Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Link: https://lore.kernel.org/r/20210501170121.512209-12-jic23@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/iio/humidity/am2315.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/humidity/am2315.c b/drivers/iio/humidity/am2315.c index 02ad1767c845..3398fa413ec5 100644 --- a/drivers/iio/humidity/am2315.c +++ b/drivers/iio/humidity/am2315.c @@ -33,7 +33,11 @@ struct am2315_data { struct i2c_client *client; struct mutex lock; - s16 buffer[8]; /* 2x16-bit channels + 2x16 padding + 4x16 timestamp */ + /* Ensure timestamp is naturally aligned */ + struct { + s16 chans[2]; + s64 timestamp __aligned(8); + } scan; };
struct am2315_sensor_data { @@ -167,20 +171,20 @@ static irqreturn_t am2315_trigger_handler(int irq, void *p)
mutex_lock(&data->lock); if (*(indio_dev->active_scan_mask) == AM2315_ALL_CHANNEL_MASK) { - data->buffer[0] = sensor_data.hum_data; - data->buffer[1] = sensor_data.temp_data; + data->scan.chans[0] = sensor_data.hum_data; + data->scan.chans[1] = sensor_data.temp_data; } else { i = 0; for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) { - data->buffer[i] = (bit ? sensor_data.temp_data : - sensor_data.hum_data); + data->scan.chans[i] = (bit ? sensor_data.temp_data : + sensor_data.hum_data); i++; } } mutex_unlock(&data->lock);
- iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, pf->timestamp); err: iio_trigger_notify_done(indio_dev->trig);