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authorJerome Brunet <jbrunet@baylibre.com>2020-04-20 13:45:11 +0200
committerMark Brown <broonie@kernel.org>2020-04-20 13:58:22 +0100
commitde911b4e683f9c28a063bb62991f2db206c38ba4 (patch)
treebce134cabd6a2a78b41c3b956a91d7f4bccfa0e4 /sound
parentASoC: meson: axg-card: fix codec-to-codec link setup (diff)
downloadwireguard-linux-de911b4e683f9c28a063bb62991f2db206c38ba4.tar.xz
wireguard-linux-de911b4e683f9c28a063bb62991f2db206c38ba4.zip
ASoC: meson: gx-card: fix codec-to-codec link setup
Since the addition of commit 9b5db059366a ("ASoC: soc-pcm: dpcm: Only allow playback/capture if supported"), meson-axg cards which have codec-to-codec links fail to init and Oops. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000128 Internal error: Oops: 96000044 [#1] PREEMPT SMP CPU: 3 PID: 1582 Comm: arecord Not tainted 5.7.0-rc1 pc : invalidate_paths_ep+0x30/0xe0 lr : snd_soc_dapm_dai_get_connected_widgets+0x170/0x1a8 Call trace: invalidate_paths_ep+0x30/0xe0 snd_soc_dapm_dai_get_connected_widgets+0x170/0x1a8 dpcm_path_get+0x38/0xd0 dpcm_fe_dai_open+0x70/0x920 snd_pcm_open_substream+0x564/0x840 snd_pcm_open+0xfc/0x228 snd_pcm_capture_open+0x4c/0x78 snd_open+0xac/0x1a8 ... While this error was initially reported the axg-card type, it also applies to the gx-card type. While initiliazing the links, ASoC treats the codec-to-codec links of this card type as a DPCM backend. This error eventually leads to the Oops. Most of the card driver code is shared between DPCM backends and codec-to-codec links. The property "no_pcm" marking DCPM BE was left set on codec-to-codec links, leading to this problem. This commit fixes that. Fixes: e37a0c313a0f ("ASoC: meson: gx: add sound card support") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Link: https://lore.kernel.org/r/20200420114511.450560-3-jbrunet@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/meson/gx-card.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/soc/meson/gx-card.c b/sound/soc/meson/gx-card.c
index 7b01dcb73e5e..4abf7efb7eac 100644
--- a/sound/soc/meson/gx-card.c
+++ b/sound/soc/meson/gx-card.c
@@ -108,8 +108,10 @@ static int gx_card_add_link(struct snd_soc_card *card, struct device_node *np,
ret = gx_card_parse_i2s(card, np, index);
/* Or apply codec to codec params if necessary */
- else if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL"))
+ else if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL")) {
dai_link->params = &codec_params;
+ dai_link->no_pcm = 0; /* link is not a DPCM BE */
+ }
return ret;
}