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authorFabio Estevam <fabio.estevam@freescale.com>2015-01-14 11:56:22 -0200
committerMark Brown <broonie@kernel.org>2015-01-14 17:13:46 +0000
commit0984f3410089a773e408a0a76f719df109436cf1 (patch)
tree947a0e266e69659b729770b9e1c003f0759acf27 /sound
parent97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff)
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ASoC: fsl: imx-wm8962: Set the card owner field
The following crash happens when trying to unload the snd_soc_imx_wm8962 module while playback is active: [ 208.666868] Unable to handle kernel paging request at virtc [ 208.674110] pgd = 80004000 [ 208.676867] [7f06541c] *pgd=4c334811, *pte=00000000, *ppte=00000000 [ 208.683211] Internal error: Oops: 80000007 [#1] SMP ARM [ 208.688445] Modules linked in: snd_soc_wm8962 snd_soc_fsl_ssi snd_soc_imx_audmux imx_pcm_fiq evbug] ... In order to avoid such problem, fill the card owner field as suggested by Lars-Peter Clausen: "But looking at the source it seems that this is a core feature of ALSA and at least for the card module itself it will do the ref-counting when a stream is started/stopped. And we even support setting the owner of a card in ASoC. It's just that pretty much no ASoC card driver bothers to set the owner field in the snd_soc_card struct. So this particular problem can be fixed by updating the imx-wm8962 driver to set the owner field." By doing as suggested, we no longer see the crash when attempting to unload the snd_soc_imx_wm8962 module while playback is active: $ modprobe -r snd_soc_imx_wm8962 modprobe: can't unload module snd_soc_imx_wm8962: Resource temporarily unavailable Reported-by: Jiada Wang <jiada_wang@mentor.com> Suggested-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/fsl/imx-wm8962.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-wm8962.c b/sound/soc/fsl/imx-wm8962.c
index 4caacb05a623..cd146d4fa805 100644
--- a/sound/soc/fsl/imx-wm8962.c
+++ b/sound/soc/fsl/imx-wm8962.c
@@ -257,6 +257,7 @@ static int imx_wm8962_probe(struct platform_device *pdev)
if (ret)
goto clk_fail;
data->card.num_links = 1;
+ data->card.owner = THIS_MODULE;
data->card.dai_link = &data->dai;
data->card.dapm_widgets = imx_wm8962_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);