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[3/6] rpmsg: glink: Put an extra reference during cleanup

Message ID 20190918171916.4039-4-bjorn.andersson@linaro.org (mailing list archive)
State Superseded
Headers show
Series rpmsg: glink stability fixes | expand

Commit Message

Bjorn Andersson Sept. 18, 2019, 5:19 p.m. UTC
From: Chris Lew <clew@codeaurora.org>

In a remote processor crash scenario, there is no guarantee the remote
processor sent close requests before it went into a bad state. Remove
the reference that is normally handled by the close command in the
so channel resources can be released.

Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver")
Cc: stable@vger.kernel.org
Signed-off-by: Chris Lew <clew@codeaurora.org>
Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
 drivers/rpmsg/qcom_glink_native.c | 4 ++++
 1 file changed, 4 insertions(+)
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diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 72ed671f5dcd..21fd2ae5f7f1 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1641,6 +1641,10 @@  void qcom_glink_native_remove(struct qcom_glink *glink)
 	idr_for_each_entry(&glink->lcids, channel, cid)
 		kref_put(&channel->refcount, qcom_glink_channel_release);
+	/* Release any defunct local channels, waiting for close-req */
+	idr_for_each_entry(&glink->rcids, channel, cid)
+		kref_put(&channel->refcount, qcom_glink_channel_release);
 	spin_unlock_irqrestore(&glink->idr_lock, flags);