This is a note to let you know that I've just added the patch titled rpmsg: glink: Put an extra reference during cleanup to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: rpmsg-glink-put-an-extra-reference-during-cleanup.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b646293e272816dd0719529dcebbd659de0722f7 Mon Sep 17 00:00:00 2001 From: Chris Lew <clew@xxxxxxxxxxxxxx> Date: Fri, 4 Oct 2019 15:26:59 -0700 Subject: rpmsg: glink: Put an extra reference during cleanup From: Chris Lew <clew@xxxxxxxxxxxxxx> commit b646293e272816dd0719529dcebbd659de0722f7 upstream. 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@xxxxxxxxxxxxxxx Tested-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx> Reported-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/rpmsg/qcom_glink_native.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1613,6 +1613,10 @@ void qcom_glink_native_remove(struct qco 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); + idr_destroy(&glink->lcids); idr_destroy(&glink->rcids); spin_unlock_irqrestore(&glink->idr_lock, flags); Patches currently in stable-queue which might be from clew@xxxxxxxxxxxxxx are queue-4.14/rpmsg-glink-fix-rpmsg_register_device-err-handling.patch queue-4.14/rpmsg-glink-don-t-send-pending-rx_done-during-remove.patch queue-4.14/rpmsg-glink-fix-reuse-intents-memory-leak-issue.patch queue-4.14/rpmsg-glink-set-tail-pointer-to-0-at-end-of-fifo.patch queue-4.14/rpmsg-glink-put-an-extra-reference-during-cleanup.patch queue-4.14/rpmsg-glink-free-pending-deferred-work-on-remove.patch