linux-kernel - [PATCH] radio: wl1273: add check on core->write() return value

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Date:   Wed, 21 Jun 2017 23:01:22 -0500
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: [PATCH] radio: wl1273: add check on core->write() return value

Check return value from call to core->write(), so in case of
error print error message, jump to goto label fail and eventually
return.

Addresses-Coverity-ID: 1226943
Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
---
 drivers/media/radio/radio-wl1273.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c
index 7240223..17e82a9 100644
--- a/drivers/media/radio/radio-wl1273.c
+++ b/drivers/media/radio/radio-wl1273.c
@@ -610,10 +610,21 @@ static int wl1273_fm_start(struct wl1273_device *radio, int new_mode)
 			}
 		}
 
-		if (radio->rds_on)
+		if (radio->rds_on) {
 			r = core->write(core, WL1273_RDS_DATA_ENB, 1);
-		else
+			if (r) {
+				dev_err(dev, "%s: RDS_DATA_ENB ON fails\n",
+					__func__);
+				goto fail;
+			}
+		} else {
 			r = core->write(core, WL1273_RDS_DATA_ENB, 0);
+			if (r) {
+				dev_err(dev, "%s: RDS_DATA_ENB OFF fails\n",
+					__func__);
+				goto fail;
+			}
+		}
 	} else {
 		dev_warn(dev, "%s: Illegal mode.\n", __func__);
 	}
-- 
2.5.0