linux-kernel - [PATCH] [media] cx88: Use common error handling code in get_key

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Message-ID: <962b8373-ca02-b27a-cc25-eb9b4ac16e05@users.sourceforge.net>
Date:   Mon, 25 Sep 2017 21:15:06 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org, Andi Shyti <andi.shyti@...sung.com>,
        Andrey Utkin <andrey_utkin@...tmail.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sean Young <sean@...s.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] [media] cx88: Use common error handling code in
 get_key_pvr2000()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 25 Sep 2017 21:03:57 +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.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/pci/cx88/cx88-input.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/media/pci/cx88/cx88-input.c b/drivers/media/pci/cx88/cx88-input.c
index e02449bf2041..001fbb97bcdf 100644
--- a/drivers/media/pci/cx88/cx88-input.c
+++ b/drivers/media/pci/cx88/cx88-input.c
@@ -566,20 +566,17 @@ static int get_key_pvr2000(struct IR_i2c *ir, enum rc_proto *protocol,
 
 	/* poll IR chip */
 	flags = i2c_smbus_read_byte_data(ir->c, 0x10);
-	if (flags < 0) {
-		dprintk("read error\n");
-		return 0;
-	}
+	if (flags < 0)
+		goto report_read_failure;
+
 	/* key pressed ? */
 	if (0 == (flags & 0x80))
 		return 0;
 
 	/* read actual key code */
 	code = i2c_smbus_read_byte_data(ir->c, 0x00);
-	if (code < 0) {
-		dprintk("read error\n");
-		return 0;
-	}
+	if (code < 0)
+		goto report_read_failure;
 
 	dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
 		code & 0xff, flags & 0xff);
@@ -588,6 +585,10 @@ static int get_key_pvr2000(struct IR_i2c *ir, enum rc_proto *protocol,
 	*scancode = code & 0xff;
 	*toggle = 0;
 	return 1;
+
+report_read_failure:
+	dprintk("read error\n");
+	return 0;
 }
 
 void cx88_i2c_init_ir(struct cx88_core *core)
-- 
2.14.1