releases/4.19.22/iio-ti-ads8688-update-buffer-allocation-for-timestamps.patch

   1 From f214ff521fb1f861c8d7f7d0af98b06bf61b3369 Mon Sep 17 00:00:00 2001
   2 From: Dan Murphy <dmurphy@ti.com>
   3 Date: Fri, 11 Jan 2019 13:57:07 -0600
   4 Subject: iio: ti-ads8688: Update buffer allocation for timestamps
   5
   6 From: Dan Murphy <dmurphy@ti.com>
   7
   8 commit f214ff521fb1f861c8d7f7d0af98b06bf61b3369 upstream.
   9
  10 Per Jonathan Cameron, the buffer needs to allocate room for a
  11 64 bit timestamp as well as the channels.  Change the buffer
  12 to allocate this additional space.
  13
  14 Fixes: 2a86487786b5c ("iio: adc: ti-ads8688: add trigger and buffer support")
  15 Signed-off-by: Dan Murphy <dmurphy@ti.com>
  16 Cc: <Stable@vger.kernel.org>
  17 Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19
  20 ---
  21  drivers/iio/adc/ti-ads8688.c |    3 ++-
  22  1 file changed, 2 insertions(+), 1 deletion(-)
  23
  24 --- a/drivers/iio/adc/ti-ads8688.c
  25 +++ b/drivers/iio/adc/ti-ads8688.c
  26 @@ -41,6 +41,7 @@
  27
  28  #define ADS8688_VREF_MV                        4096
  29  #define ADS8688_REALBITS               16
  30 +#define ADS8688_MAX_CHANNELS           8
  31
  32  /*
  33   * enum ads8688_range - ADS8688 reference voltage range
  34 @@ -385,7 +386,7 @@ static irqreturn_t ads8688_trigger_handl
  35  {
  36         struct iio_poll_func *pf = p;
  37         struct iio_dev *indio_dev = pf->indio_dev;
  38 -       u16 buffer[8];
  39 +       u16 buffer[ADS8688_MAX_CHANNELS + sizeof(s64)/sizeof(u16)];
  40         int i, j = 0;
  41
  42         for (i = 0; i < indio_dev->masklength; i++) {