linux-kernel - [PATCH] Staging: comedi: drivers: comedi_test: Avoid multiple line dereference

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Date:   Mon, 20 Feb 2017 16:28:35 +0800
From:   Cheah Kok Cheong <thrust73@...il.com>
To:     abbotti@....co.uk, hsweeten@...ionengravers.com,
        gregkh@...uxfoundation.org, devel@...verdev.osuosl.org
Cc:     linux-kernel@...r.kernel.org, Cheah Kok Cheong <thrust73@...il.com>
Subject: [PATCH] Staging: comedi: drivers: comedi_test: Avoid multiple line dereference

Fix checkpatch warning "Avoid multiple line dereference"
using a local variable to avoid line wrap.

Signed-off-by: Cheah Kok Cheong <thrust73@...il.com>
---
 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;
-- 
2.7.4