linux-iio.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Jonathan Cameron <jic23@kernel.org>
To: linux-iio@vger.kernel.org
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH 02/19] iio: accel: bma220: Fix buffer alignment in iio_push_to_buffers_with_timestamp()
Date: Thu, 13 May 2021 18:26:06 +0100	[thread overview]
Message-ID: <20210513182606.2abf9e73@jic23-huawei> (raw)
In-Reply-To: <20210501170121.512209-3-jic23@kernel.org>

On Sat,  1 May 2021 18:01:04 +0100
Jonathan Cameron <jic23@kernel.org> wrote:

> From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
> 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.
~Gah. Clearly wasn't on my best form when I originally wrote these.
Number of chans in this one is wrong as well.  Fixed to 3 as per the
comment that got dropped because it should have been obvious.

As you might imagine, the error in patch 1 made me look closer at
the rest of these whilst applying.
> 
> Fixes: 194dc4c71413 ("iio: accel: Add triggered buffer support for BMA220")
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Applied to the togreg branch of iio.git and pushed out as testing for the
autobuilders to poke at.

Thanks,

Jonathan

> ---
>  drivers/iio/accel/bma220_spi.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c
> index 36fc9876dbca..2802ce1852ef 100644
> --- a/drivers/iio/accel/bma220_spi.c
> +++ b/drivers/iio/accel/bma220_spi.c
> @@ -63,7 +63,11 @@ static const int bma220_scale_table[][2] = {
>  struct bma220_data {
>  	struct spi_device *spi_device;
>  	struct mutex lock;
> -	s8 buffer[16]; /* 3x8-bit channels + 5x8 padding + 8x8 timestamp */
> +	struct {
> +		s8 chans[2];
> +		/* Ensure timestamp is naturally aligned. */
> +		s64 timestamp __aligned(8);
> +	} scan;
>  	u8 tx_buf[2] ____cacheline_aligned;
>  };
>  
> @@ -94,12 +98,12 @@ static irqreturn_t bma220_trigger_handler(int irq, void *p)
>  
>  	mutex_lock(&data->lock);
>  	data->tx_buf[0] = BMA220_REG_ACCEL_X | BMA220_READ_MASK;
> -	ret = spi_write_then_read(spi, data->tx_buf, 1, data->buffer,
> +	ret = spi_write_then_read(spi, data->tx_buf, 1, &data->scan.chans,
>  				  ARRAY_SIZE(bma220_channels) - 1);
>  	if (ret < 0)
>  		goto err;
>  
> -	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
> +	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
>  					   pf->timestamp);
>  err:
>  	mutex_unlock(&data->lock);


  reply	other threads:[~2021-05-13 17:25 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-01 17:01 [PATCH 00/19] IIO: Alignment fixes part 2 - struct used to ensure alignment Jonathan Cameron
2021-05-01 17:01 ` [PATCH 01/19] iio: accel: bma180: Fix buffer alignment in iio_push_to_buffers_with_timestamp() Jonathan Cameron
2021-05-13 17:22   ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 02/19] iio: accel: bma220: " Jonathan Cameron
2021-05-13 17:26   ` Jonathan Cameron [this message]
2021-05-01 17:01 ` [PATCH 03/19] iio: accel: hid: " Jonathan Cameron
2021-05-13 17:28   ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 04/19] iio: accel: kxcjk-1013: " Jonathan Cameron
2021-05-01 19:10   ` Andy Shevchenko
2021-05-13 17:33     ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 05/19] iio: accel: mxc4005: Fix overread of data and alignment issue Jonathan Cameron
2021-05-13 17:37   ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 06/19] iio: accel: stk8312: Fix buffer alignment in iio_push_to_buffers_with_timestamp() Jonathan Cameron
2021-05-13 17:39   ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 07/19] iio: accel: stk8ba50: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 08/19] iio: adc: ti-ads1015: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 09/19] iio: adc: vf610: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 10/19] iio: gyro: bmg160: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 11/19] iio: humidity: am2315: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 12/19] iio: prox: srf08: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 13/19] iio: prox: pulsed-light: " Jonathan Cameron
2021-05-06  6:46   ` Matt Ranostay
2021-05-01 17:01 ` [PATCH 14/19] iio: prox: as3935: " Jonathan Cameron
2021-05-06  6:45   ` Matt Ranostay
2021-05-01 17:01 ` [PATCH 15/19] iio: magn: hmc5843: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 16/19] iio: magn: bmc150: " Jonathan Cameron
2021-05-05 12:57   ` Linus Walleij
2021-05-07  9:23     ` Jonathan Cameron
2021-05-13 17:50   ` Jonathan Cameron
2021-05-01 17:01 ` [PATCH 17/19] iio: light: isl29125: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 18/19] iio: light: tcs3414: " Jonathan Cameron
2021-05-01 17:01 ` [PATCH 19/19] iio: light: tcs3472: " Jonathan Cameron
2021-05-01 19:09   ` Andy Shevchenko
2021-05-01 19:12 ` [PATCH 00/19] IIO: Alignment fixes part 2 - struct used to ensure alignment Andy Shevchenko
2021-05-13 17:54   ` Jonathan Cameron

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210513182606.2abf9e73@jic23-huawei \
    --to=jic23@kernel.org \
    --cc=Jonathan.Cameron@huawei.com \
    --cc=andriy.shevchenko@linux.intel.com \
    --cc=linux-iio@vger.kernel.org \
    --subject='Re: [PATCH 02/19] iio: accel: bma220: Fix buffer alignment in iio_push_to_buffers_with_timestamp()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox