From: Ian Abbott <abbotti@mev.co.uk> commit 1c0f20b78781b9ca50dc3ecfd396d0db5b141890 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: d1d24cb65ee3 ("staging: comedi: das6402: read analog input samples in interrupt handler") Cc: <stable@vger.kernel.org> # 3.19+ Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Link: https://lore.kernel.org/r/20210223143055.257402-5-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/staging/comedi/drivers/das6402.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/comedi/drivers/das6402.c b/drivers/staging/comedi/drivers/das6402.c index f99211ec46deb..0034005bdf8f1 100644 --- a/drivers/staging/comedi/drivers/das6402.c +++ b/drivers/staging/comedi/drivers/das6402.c @@ -186,7 +186,7 @@ static irqreturn_t das6402_interrupt(int irq, void *d) if (status & DAS6402_STATUS_FFULL) { async->events |= COMEDI_CB_OVERFLOW; } else if (status & DAS6402_STATUS_FFNE) { - unsigned int val; + unsigned short val; val = das6402_ai_read_sample(dev, s); comedi_buf_write_samples(s, &val, 1); -- 2.25.1