linux-kernel - [PATCH 1/8] [media] cx231xx: Delete eight error messages for a failed memory allocation

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Date:   Sun, 17 Sep 2017 22:16:50 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org, Bhumika Goyal <bhumirks@...il.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Johan Hovold <johan@...nel.org>,
        Julia Lawall <Julia.Lawall@...6.fr>,
        Matthias Schwarzott <zzam@...too.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Oleh Kravchenko <oleg@....org.ua>,
        Peter Rosin <peda@...ntia.se>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/8] [media] cx231xx: Delete eight error messages for a failed
 memory allocation

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 17 Sep 2017 17:43:47 +0200

Omit extra messages for a memory allocation failure in these functions.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/usb/cx231xx/cx231xx-core.c | 14 ++------------
 drivers/media/usb/cx231xx/cx231xx-dvb.c  |  7 ++-----
 drivers/media/usb/cx231xx/cx231xx-vbi.c  | 11 +----------
 3 files changed, 5 insertions(+), 27 deletions(-)

diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c
index f372ad3917a8..d9f4ae50e869 100644
--- a/drivers/media/usb/cx231xx/cx231xx-core.c
+++ b/drivers/media/usb/cx231xx/cx231xx-core.c
@@ -1038,12 +1038,7 @@ int cx231xx_init_isoc(struct cx231xx *dev, int max_packets,
-	if (!dev->video_mode.isoc_ctl.urb) {
-		dev_err(dev->dev,
-			"cannot alloc memory for usb buffers\n");
+	if (!dev->video_mode.isoc_ctl.urb)
 		return -ENOMEM;
-	}
 
 	dev->video_mode.isoc_ctl.transfer_buffer =
 	    kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
 	if (!dev->video_mode.isoc_ctl.transfer_buffer) {
-		dev_err(dev->dev,
-			"cannot allocate memory for usbtransfer\n");
 		kfree(dev->video_mode.isoc_ctl.urb);
@@ -1173,12 +1168,7 @@ int cx231xx_init_bulk(struct cx231xx *dev, int max_packets,
-	if (!dev->video_mode.bulk_ctl.urb) {
-		dev_err(dev->dev,
-			"cannot alloc memory for usb buffers\n");
+	if (!dev->video_mode.bulk_ctl.urb)
 		return -ENOMEM;
-	}
 
 	dev->video_mode.bulk_ctl.transfer_buffer =
 	    kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
 	if (!dev->video_mode.bulk_ctl.transfer_buffer) {
-		dev_err(dev->dev,
-			"cannot allocate memory for usbtransfer\n");
 		kfree(dev->video_mode.bulk_ctl.urb);
diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c b/drivers/media/usb/cx231xx/cx231xx-dvb.c
index c18bb33e060e..248b62e2099c 100644
--- a/drivers/media/usb/cx231xx/cx231xx-dvb.c
+++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c
@@ -618,9 +618,6 @@ static int dvb_init(struct cx231xx *dev)
-
-	if (dvb == NULL) {
-		dev_info(dev->dev,
-			 "cx231xx_dvb: memory allocation failed\n");
+	if (!dvb)
 		return -ENOMEM;
-	}
+
 	dev->dvb = dvb;
 	dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
 	dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;
diff --git a/drivers/media/usb/cx231xx/cx231xx-vbi.c b/drivers/media/usb/cx231xx/cx231xx-vbi.c
index 76e901920f6f..9c27db16db2a 100644
--- a/drivers/media/usb/cx231xx/cx231xx-vbi.c
+++ b/drivers/media/usb/cx231xx/cx231xx-vbi.c
@@ -420,12 +420,7 @@ int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
-	if (!dev->vbi_mode.bulk_ctl.urb) {
-		dev_err(dev->dev,
-			"cannot alloc memory for usb buffers\n");
+	if (!dev->vbi_mode.bulk_ctl.urb)
 		return -ENOMEM;
-	}
 
 	dev->vbi_mode.bulk_ctl.transfer_buffer =
 	    kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
 	if (!dev->vbi_mode.bulk_ctl.transfer_buffer) {
-		dev_err(dev->dev,
-			"cannot allocate memory for usbtransfer\n");
 		kfree(dev->vbi_mode.bulk_ctl.urb);
@@ -453,8 +448,4 @@ int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
 		if (!dev->vbi_mode.bulk_ctl.transfer_buffer[i]) {
-			dev_err(dev->dev,
-				"unable to allocate %i bytes for transfer buffer %i%s\n",
-				sb_size, i,
-				in_interrupt() ? " while in int" : "");
 			cx231xx_uninit_vbi_isoc(dev);
 			return -ENOMEM;
 		}
-- 
2.14.1