[PATCH AUTOSEL 5.9 109/147] rpmsg: glink: Use complete_all for open states

Sasha Levin
2020-10-27T00:32:12Z

From: Chris Lew <clew@codeaurora.org>

[ Upstream commit 4fcdaf6e28d11e2f3820d54dd23cd12a47ddd44e ]

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
races with waiters and using completion_done.

Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Link: https://lore.kernel.org/r/1593017121-7953-2-git-send-email-deesin@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/rpmsg/qcom_glink_native.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index f40312b16da06..b5570c83a28c6 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);

return 0;
}
@@ -1178,7 +1178,7 @@ static int qcom_glink_announce_create(struct rpmsg_device *rpdev)
__be32 *val = defaults;
int size;

- if (glink->intentless)
+ if (glink->intentless || !completion_done(&channel->open_ack))
return 0;

prop = of_find_property(np, "qcom,intents", NULL);
@@ -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);
--
2.25.1