linux-kernel - [PATCH 1/6] [media] tda8261: Use common error handling code in tda8261_set

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Date:   Tue, 26 Sep 2017 13:27:47 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Max Kellermann <max.kellermann@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/6] [media] tda8261: Use common error handling code in
 tda8261_set_params()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 26 Sep 2017 11:01:44 +0200

* Add a jump target so that a bit of exception handling can be better
  reused at the end of this function.

  This issue was detected by using the Coccinelle software.

* The script "checkpatch.pl" pointed information out like the following.

  ERROR: do not use assignment in if condition

  Thus fix an affected source code place.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/dvb-frontends/tda8261.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/media/dvb-frontends/tda8261.c b/drivers/media/dvb-frontends/tda8261.c
index 4eb294f330bc..5a8a9b6b8107 100644
--- a/drivers/media/dvb-frontends/tda8261.c
+++ b/drivers/media/dvb-frontends/tda8261.c
@@ -129,18 +129,18 @@ static int tda8261_set_params(struct dvb_frontend *fe)
 
 	/* Set params */
 	err = tda8261_write(state, buf);
-	if (err < 0) {
-		pr_err("%s: I/O Error\n", __func__);
-		return err;
-	}
+	err = tda8261_get_status(fe, &status);
+	if (err < 0)
+		goto report_failure;
+
 	/* sleep for some time */
 	pr_debug("%s: Waiting to Phase LOCK\n", __func__);
 	msleep(20);
 	/* check status */
-	if ((err = tda8261_get_status(fe, &status)) < 0) {
-		pr_err("%s: I/O Error\n", __func__);
-		return err;
-	}
+	err = tda8261_get_status(fe, &status);
+	if (err < 0)
+		goto report_failure;
+
 	if (status == 1) {
 		pr_debug("%s: Tuner Phase locked: status=%d\n", __func__,
 			 status);
@@ -150,6 +150,10 @@ static int tda8261_set_params(struct dvb_frontend *fe)
 	}
 
 	return 0;
+
+report_failure:
+	pr_err("%s: I/O Error\n", __func__);
+	return err;
 }
 
 static void tda8261_release(struct dvb_frontend *fe)
-- 
2.14.1