From: Jonathan Cameron Date: Sat, 1 May 2021 17:01:03 +0000 (+0100) Subject: iio: accel: bma180: Fix buffer alignment in iio_push_to_buffers_with_timestamp() X-Git-Tag: v4.4.276~112 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=540d99705bbb6f4a3e0b01ae09f9f25f388ea24d;p=thirdparty%2Fkernel%2Fstable.git iio: accel: bma180: Fix buffer alignment in iio_push_to_buffers_with_timestamp() [ Upstream commit fc36da3131a747a9367a05caf06de19be1bcc972 ] 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 this function. Fixes: b9a6a237ffc9 ("iio:bma180: Drop _update_scan_mode()") Signed-off-by: Jonathan Cameron Cc: Peter Meerwald Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210501170121.512209-2-jic23@kernel.org Signed-off-by: Sasha Levin --- diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c index f04b884069951..68c9e5478fec8 100644 --- a/drivers/iio/accel/bma180.c +++ b/drivers/iio/accel/bma180.c @@ -120,7 +120,11 @@ struct bma180_data { int scale; int bw; bool pmode; - u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */ + /* Ensure timestamp is naturally aligned */ + struct { + s16 chan[4]; + s64 timestamp __aligned(8); + } scan; }; enum bma180_chan { @@ -666,12 +670,12 @@ static irqreturn_t bma180_trigger_handler(int irq, void *p) mutex_unlock(&data->mutex); goto err; } - ((s16 *)data->buff)[i++] = ret; + data->scan.chan[i++] = ret; } mutex_unlock(&data->mutex); - iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns); + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns); err: iio_trigger_notify_done(indio_dev->trig);