From mboxrd@z Thu Jan 1 00:00:00 1970 From: borneo.antonio@gmail.com (Antonio Borneo) Date: Fri, 28 Jul 2017 01:26:11 +0200 Subject: [PATCH v2 2/3] ASoC: soc-core: fix unbalanced of_node_get()/of_node_put() In-Reply-To: <20170727232612.23543-1-antonio.borneo@st.com> References: <20170727232612.23543-1-antonio.borneo@st.com> Message-ID: <20170727232612.23543-3-antonio.borneo@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Antonio Borneo On Hikey target board, enabling CONFIG_OF_DYNAMIC triggers several errors at kernel boot, like the following one OF: ERROR: Bad of_node_put() on /soc/i2s at f7118000/ports/port at 0/endpoint each followed by stack dump. of_graph_get_port_parent() walks through the parents looking for a node named "ports". At each step it uses of_get_next_parent() that drops the current node with of_node_put(). Avoid dropping the initial node by calling of_node_get() before of_graph_get_port_parent(). Tested with kernel v4.13-rc2 with hikey_defconfig taken from https://git.linaro.org/people/john.stultz/android-dev.git branch dev/hikey-mainline-WIP This fixes commit a180e8b98843 ("ASoC: add snd_soc_get_dai_id() function"). Signed-off-by: Antonio Borneo --- To: Liam Girdwood To: Mark Brown To: Jaroslav Kysela To: Takashi Iwai To: alsa-devel at alsa-project.org Cc: linux-kernel at vger.kernel.org Cc: Wei Xu Cc: John Stultz Cc: linux-arm-kernel at lists.infradead.org Cc: Kuninori Morimoto --- sound/soc/soc-core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 921622a..a0f39de 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -4087,6 +4087,11 @@ int snd_soc_get_dai_id(struct device_node *ep) struct device_node *node; int ret; + /* + * of_graph_get_port_parent() will call + * of_node_put(). So, call of_node_get() here + */ + of_node_get(ep); node = of_graph_get_port_parent(ep); /* -- 1.9.1