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@alum.mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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)

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);

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);