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: <sta...@vger.kernel.org> # 3.19+
Signed-off-by: Ian Abbott <abbo...@mev.co.uk>
---
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 04e224f8b779..96f4107b8054 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);
--
2.30.0
_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
