[media] cx25821: fix error return code and clean up

The function cx25821_sram_channel_setup_upstream_audio always return zero,
so the return value is not saved any more.
Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 10 insertions, 7 deletions

diff --git a/drivers/media/pci/cx25821/cx25821-audio-upstream.c b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
index ad84613cf88..42ad84a6854 100644
--- a/drivers/media/pci/cx25821/cx25821-audio-upstream.c
+++ b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
@@ -700,7 +700,6 @@ fail_irq:
 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
 {
         struct sram_channel *sram_ch;
-        int retval = 0;
         int err = 0;
         int str_length = 0;
 
@@ -735,8 +734,10 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
                 dev->_audiofilename = kmemdup(dev->input_audiofilename,
                                               str_length + 1, GFP_KERNEL);
 
-                if (!dev->_audiofilename)
+                if (!dev->_audiofilename) {
+                        err = -ENOMEM;
                         goto error;
+                }
 
                 /* Default if filename is empty string */
                 if (strcmp(dev->input_audiofilename, "") == 0)
@@ -746,12 +747,14 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
                 dev->_audiofilename = kmemdup(_defaultAudioName,
                                               str_length + 1, GFP_KERNEL);
 
-                if (!dev->_audiofilename)
+                if (!dev->_audiofilename) {
+                        err = -ENOMEM;
                         goto error;
+                }
         }
 
-        retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
-                                                        _line_size, 0);
+        cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
+                                                  _line_size, 0);
 
         dev->audio_upstream_riscbuf_size =
                 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
@@ -759,9 +762,9 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
         dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
 
         /* Allocating buffers and prepare RISC program */
-        retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
+        err = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
                                                         _line_size);
-        if (retval < 0) {
+        if (err < 0) {
                 pr_err("%s: Failed to set up Audio upstream buffers!\n",
                         dev->name);
                 goto error;