[media] cx25821: Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/media/video/cx25821/cx25821-audio-upstream.c b/drivers/media/video/cx25821/cx25821-audio-upstream.c
index 4dc2a241335c..20c7ca3351a8 100644
--- a/drivers/media/video/cx25821/cx25821-audio-upstream.c
+++ b/drivers/media/video/cx25821/cx25821-audio-upstream.c
@@ -733,25 +733,22 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
 
         if (dev->input_audiofilename) {
                 str_length = strlen(dev->input_audiofilename);
-                dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
+                dev->_audiofilename = kmemdup(dev->input_audiofilename,
+                                              str_length + 1, GFP_KERNEL);
 
                 if (!dev->_audiofilename)
                         goto error;
 
-                memcpy(dev->_audiofilename, dev->input_audiofilename,
-                       str_length + 1);
-
                 /* Default if filename is empty string */
                 if (strcmp(dev->input_audiofilename, "") == 0)
                         dev->_audiofilename = "/root/audioGOOD.wav";
         } else {
                 str_length = strlen(_defaultAudioName);
-                dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
+                dev->_audiofilename = kmemdup(_defaultAudioName,
+                                              str_length + 1, GFP_KERNEL);
 
                 if (!dev->_audiofilename)
                         goto error;
-
-                memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
         }
 
         retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,