linux-kernel - [PATCH V4 8/9] rpmsg: glink: unregister rpmsg device during endpoint destroy

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Message-Id: <1532693849-7037-9-git-send-email-aneela@codeaurora.org>
Date:   Fri, 27 Jul 2018 17:47:28 +0530
From:   Arun Kumar Neelakantam <aneela@...eaurora.org>
To:     ohad@...ery.com, bjorn.andersson@...aro.org, clew@...eaurora.org,
        robh+dt@...nel.org, arnaud.pouliquen@...com, andy.gross@...aro.org
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Arun Kumar Neelakantam <aneela@...eaurora.org>
Subject: [PATCH V4 8/9] rpmsg: glink: unregister rpmsg device during endpoint destroy

Rpmsg device unregister is not happening if channel close is triggered
from local side and causing re-registration of device failures.

Unregister rpmsg device for local close in endpoint destroy path.

Signed-off-by: Arun Kumar Neelakantam <aneela@...eaurora.org>
---
 drivers/rpmsg/qcom_glink_native.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 484b427..d849bc4 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1184,6 +1184,7 @@ static void qcom_glink_destroy_ept(struct rpmsg_endpoint *ept)
 {
 	struct glink_channel *channel = to_glink_channel(ept);
 	struct qcom_glink *glink = channel->glink;
+	struct rpmsg_channel_info chinfo;
 	unsigned long flags;
 
 	spin_lock_irqsave(&channel->recv_lock, flags);
@@ -1191,6 +1192,13 @@ static void qcom_glink_destroy_ept(struct rpmsg_endpoint *ept)
 	spin_unlock_irqrestore(&channel->recv_lock, flags);
 
 	/* Decouple the potential rpdev from the channel */
+	if (channel->rpdev) {
+		strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
+		chinfo.src = RPMSG_ADDR_ANY;
+		chinfo.dst = RPMSG_ADDR_ANY;
+
+		rpmsg_unregister_device(glink->dev, &chinfo);
+	}
 	channel->rpdev = NULL;
 
 	qcom_glink_send_close_req(glink, channel);
@@ -1456,6 +1464,7 @@ static void qcom_glink_rx_close(struct qcom_glink *glink, unsigned int rcid)
 
 		rpmsg_unregister_device(glink->dev, &chinfo);
 	}
+	channel->rpdev = NULL;
 
 	qcom_glink_send_close_ack(glink, channel->rcid);
 
-- 
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