Re: [PATCH V5 1/5] rpmsg: glink: Use complete_all for open states

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On 5/14/2020 2:29 AM, Mathieu Poirier wrote:
Hi Arun,

On Wed, May 13, 2020 at 10:40:02AM +0530, Arun Kumar Neelakantam wrote:
From: Chris Lew <clew@xxxxxxxxxxxxxx>

The open_req and open_ack completion variables are the state variables
to represet a remote channel as open. Use complete_all so there are no
s/represet/represent
done added in patch set 6

races with waiters and using completion_done.

Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx>
Signed-off-by: Arun Kumar Neelakantam <aneela@xxxxxxxxxxxxxx>
---
  drivers/rpmsg/qcom_glink_native.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 1995f5b..604f11f 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -970,7 +970,7 @@ static int qcom_glink_rx_open_ack(struct qcom_glink *glink, unsigned int lcid)
  		return -EINVAL;
  	}
- complete(&channel->open_ack);
+	complete_all(&channel->open_ack);
If you do this and as per the note in the comment section above
completion_done(), there shouldn't be a need to call completion_done() in
qcom_glink_announce_create().

Thanks,
Mathieu
the completion_done() check still required to avoid sending intent request on channel which only opened by remote.
return 0;
  }
@@ -1413,7 +1413,7 @@ static int qcom_glink_rx_open(struct qcom_glink *glink, unsigned int rcid,
  	channel->rcid = ret;
  	spin_unlock_irqrestore(&glink->idr_lock, flags);
- complete(&channel->open_req);
+	complete_all(&channel->open_req);
if (create_device) {
  		rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
--
2.7.4



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