Re: [PATCH] Staging: comedi: drivers: comedi_test: Avoid multiple line dereference

From: Ian Abbott
Date: Mon Feb 20 2017 - 05:05:41 EST


On 20/02/17 08:28, Cheah Kok Cheong wrote:
Fix checkpatch warning "Avoid multiple line dereference"
using a local variable to avoid line wrap.

Signed-off-by: Cheah Kok Cheong <thrust73@xxxxxxxxx>
---
drivers/staging/comedi/drivers/comedi_test.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c
index 2a063f0..fde83e0 100644
--- a/drivers/staging/comedi/drivers/comedi_test.c
+++ b/drivers/staging/comedi/drivers/comedi_test.c
@@ -480,11 +480,9 @@ static void waveform_ao_timer(unsigned long arg)
/* output the last scan */
for (i = 0; i < cmd->scan_end_arg; i++) {
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
+ unsigned short d = devpriv->ao_loopbacks[chan];

- if (comedi_buf_read_samples(s,
- &devpriv->
- ao_loopbacks[chan],
- 1) == 0) {
+ if (!comedi_buf_read_samples(s, &d, 1)) {
/* unexpected underrun! (cancelled?) */
async->events |= COMEDI_CB_OVERFLOW;
goto underrun;


NAK. This leaves devpriv->ao_loopbacks[chan] unchanged.

--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Web: http://www.mev.co.uk/ )=-