On 2013-08-20 09:57, Dan Carpenter wrote:
In dt282x_ai_insn_read() we call this macro like:
wait_for(!mux_busy(), comedi_error(dev, "timeout\n"); return -ETIME;);
Because the if statement doesn't have curly braces it means we always
return -ETIME and the function never succeeds.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
This macro is very ugly, btw.
diff --git a/drivers/staging/comedi/drivers/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c
index 23cb0335..4a25382 100644
--- a/drivers/staging/comedi/drivers/dt282x.c
+++ b/drivers/staging/comedi/drivers/dt282x.c
@@ -267,8 +267,9 @@ struct dt282x_private {
} \
udelay(5); \
} \
- if (_i) \
+ if (_i) { \
b \
+ } \
} while (0)
static int prep_ai_dma(struct comedi_device *dev, int chan, int size);
Acked-by: Ian Abbott <abbotti@xxxxxxxxx>
The bug was introduced by commit
18e7e78e945527d9cb570a17f0835815f1794c2f in mainline. And yes, it is ugly.
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-
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