diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2021-02-23 14:30:49 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 17:06:32 +0100 |
| commit | ddfeb236ed8e4b35f44468e65cd806c3b33d2a5c (patch) | |
| tree | f8e9787aa6cfb37e865188062378deae37a3531a /drivers/staging | |
| parent | c30fe0f767c3c5b27ef624ed9895f87114e55305 (diff) | |
staging: comedi: pcl711: Fix endian problem for AI command data
commit a084303a645896e834883f2c5170d044410dfdb3 upstream.
The analog input subdevice supports Comedi asynchronous commands that
use Comedi's 16-bit sample format. However, the call to
`comedi_buf_write_samples()` is passing the address of a 32-bit integer
variable. On bigendian machines, this will copy 2 bytes from the wrong
end of the 32-bit value. Fix it by changing the type of the variable
holding the sample value to `unsigned short`.
Fixes: 1f44c034de2e ("staging: comedi: pcl711: use comedi_buf_write_samples()")
Cc: <stable@vger.kernel.org> # 3.19+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20210223143055.257402-9-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/drivers/pcl711.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/comedi/drivers/pcl711.c b/drivers/staging/comedi/drivers/pcl711.c index 2dbf69e30965..bd6f42fe9e3c 100644 --- a/drivers/staging/comedi/drivers/pcl711.c +++ b/drivers/staging/comedi/drivers/pcl711.c @@ -184,7 +184,7 @@ static irqreturn_t pcl711_interrupt(int irq, void *d) struct comedi_device *dev = d; struct comedi_subdevice *s = dev->read_subdev; struct comedi_cmd *cmd = &s->async->cmd; - unsigned int data; + unsigned short data; if (!dev->attached) { dev_err(dev->class_dev, "spurious interrupt\n"); |