linux-kernel - [PATCH 05/24] staging: cx25821: Remove NULL check before kfree

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Date:	Sun, 13 Mar 2011 00:28:58 -0500
From:	Ilia Mirkin <imirkin@...m.mit.edu>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 05/24] staging: cx25821: Remove NULL check before kfree

This patch was generated by the following semantic patch:
// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);

@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>

Signed-off-by: Ilia Mirkin <imirkin@...m.mit.edu>
---
 drivers/staging/cx25821/cx25821-audio-upstream.c   |    9 +++------
 .../staging/cx25821/cx25821-video-upstream-ch2.c   |    9 +++------
 drivers/staging/cx25821/cx25821-video-upstream.c   |    9 +++------
 3 files changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/cx25821/cx25821-audio-upstream.c b/drivers/staging/cx25821/cx25821-audio-upstream.c
index 7992a3b..0f9ca77 100644
--- a/drivers/staging/cx25821/cx25821-audio-upstream.c
+++ b/drivers/staging/cx25821/cx25821-audio-upstream.c
@@ -244,13 +244,10 @@ void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
 	dev->_audioframe_count = 0;
 	dev->_audiofile_status = END_OF_FILE;
 
-	if (dev->_irq_audio_queues) {
-		kfree(dev->_irq_audio_queues);
-		dev->_irq_audio_queues = NULL;
-	}
+	kfree(dev->_irq_audio_queues);
+	dev->_irq_audio_queues = NULL;
 
-	if (dev->_audiofilename != NULL)
-		kfree(dev->_audiofilename);
+	kfree(dev->_audiofilename);
 }
 
 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
diff --git a/drivers/staging/cx25821/cx25821-video-upstream-ch2.c b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
index e2efacd..655357d 100644
--- a/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
+++ b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
@@ -234,13 +234,10 @@ void cx25821_stop_upstream_video_ch2(struct cx25821_dev *dev)
 	dev->_frame_count_ch2 = 0;
 	dev->_file_status_ch2 = END_OF_FILE;
 
-	if (dev->_irq_queues_ch2) {
-		kfree(dev->_irq_queues_ch2);
-		dev->_irq_queues_ch2 = NULL;
-	}
+	kfree(dev->_irq_queues_ch2);
+	dev->_irq_queues_ch2 = NULL;
 
-	if (dev->_filename_ch2 != NULL)
-		kfree(dev->_filename_ch2);
+	kfree(dev->_filename_ch2);
 
 	tmp = cx_read(VID_CH_MODE_SEL);
 	cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
diff --git a/drivers/staging/cx25821/cx25821-video-upstream.c b/drivers/staging/cx25821/cx25821-video-upstream.c
index 31b4e3c..eb0172b 100644
--- a/drivers/staging/cx25821/cx25821-video-upstream.c
+++ b/drivers/staging/cx25821/cx25821-video-upstream.c
@@ -279,13 +279,10 @@ void cx25821_stop_upstream_video_ch1(struct cx25821_dev *dev)
 	dev->_frame_count = 0;
 	dev->_file_status = END_OF_FILE;
 
-	if (dev->_irq_queues) {
-		kfree(dev->_irq_queues);
-		dev->_irq_queues = NULL;
-	}
+	kfree(dev->_irq_queues);
+	dev->_irq_queues = NULL;
 
-	if (dev->_filename != NULL)
-		kfree(dev->_filename);
+	kfree(dev->_filename);
 
 	tmp = cx_read(VID_CH_MODE_SEL);
 	cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
-- 
1.7.3.4

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