[PATCH V1 4/6] rpmsg: glink: Remove the rpmsg dev in close_ack

[Deepak Kumar Singh]

From: Arun Kumar Neelakantam <ane...@codeaurora.org>

Un-register and register of rpmsg driver is sending invalid open_ack
on closed channel.

To avoid sending invalid open_ack case unregister the rpmsg device
after receiving the local_close_ack from remote side.

Signed-off-by: Deepak Kumar Singh <dee...@codeaurora.org>
signed-off-by: Arun Kumar Neelakantam <ane...@codeaurora.org>
---
 drivers/rpmsg/qcom_glink_native.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c 
b/drivers/rpmsg/qcom_glink_native.c
index ac179b1..031bc1d 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1526,6 +1526,7 @@ 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);
 
@@ -1539,6 +1540,7 @@ static void qcom_glink_rx_close(struct qcom_glink *glink, 
unsigned int rcid)
 
 static void qcom_glink_rx_close_ack(struct qcom_glink *glink, unsigned int 
lcid)
 {
+       struct rpmsg_channel_info chinfo;
        struct glink_channel *channel;
        unsigned long flags;
 
@@ -1553,6 +1555,16 @@ static void qcom_glink_rx_close_ack(struct qcom_glink 
*glink, unsigned int lcid)
        channel->lcid = 0;
        spin_unlock_irqrestore(&glink->idr_lock, flags);
 
+       /* Decouple the potential rpdev from the channel */
+       if (channel->rpdev) {
+               strlcpy(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;
+
        kref_put(&channel->refcount, qcom_glink_channel_release);
 }
 
-- 
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