ASoC: Fix the device references to codec and platform drivers
Harsha Priya [Wed, 5 Jan 2011 06:04:51 +0000 (11:04 +0530)]
The soc-core takes the platform and codec driver reference during probe. Few of
these references are not released during remove. This cause the platform and
codec driver module unload to fail.

This patch fixes by the taking only one reference to platform and codec module
during probe and releases them correctly during remove. This allows load/unload
properly

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Harsha Priya <priya.harsha@intel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-core.c

index a233607..bac7291 100644 (file)
@@ -1259,9 +1259,6 @@ find_codec:
                if (!strcmp(codec->name, dai_link->codec_name)) {
                        rtd->codec = codec;
 
-                       if (!try_module_get(codec->dev->driver->owner))
-                               return -ENODEV;
-
                        /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
                        list_for_each_entry(codec_dai, &dai_list, list) {
                                if (codec->dev == codec_dai->dev &&
@@ -1287,10 +1284,6 @@ find_platform:
        /* no, then find CPU DAI from registered DAIs*/
        list_for_each_entry(platform, &platform_list, list) {
                if (!strcmp(platform->name, dai_link->platform_name)) {
-
-                       if (!try_module_get(platform->dev->driver->owner))
-                               return -ENODEV;
-
                        rtd->platform = platform;
                        goto out;
                }
@@ -1425,6 +1418,9 @@ static int soc_probe_codec(struct snd_soc_card *card,
        soc_init_codec_debugfs(codec);
 
        /* mark codec as probed and add to card codec list */
+       if (!try_module_get(codec->dev->driver->owner))
+               return -ENODEV;
+
        codec->probed = 1;
        list_add(&codec->card_list, &card->codec_dev_list);
        list_add(&codec->dapm.list, &card->dapm_list);
@@ -1556,6 +1552,10 @@ static int soc_probe_dai_link(struct snd_soc_card *card, int num)
                        }
                }
                /* mark platform as probed and add to card platform list */
+
+               if (!try_module_get(platform->dev->driver->owner))
+                       return -ENODEV;
+
                platform->probed = 1;
                list_add(&platform->card_list, &card->platform_dev_list);
        }