linux-kernel - [PATCH v2] greybus/operation: Drop reference when message has been sent

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Message-Id: <20210310141736.3459-1-lyl2019@mail.ustc.edu.cn>
Date:   Wed, 10 Mar 2021 06:17:36 -0800
From:   Lv Yunlong <lyl2019@...l.ustc.edu.cn>
To:     johan@...nel.org, elder@...nel.org, gregkh@...uxfoundation.org
Cc:     greybus-dev@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Lv Yunlong <lyl2019@...l.ustc.edu.cn>
Subject: [PATCH v2] greybus/operation: Drop reference when message has been sent

In gb_operation_response_send, get an extra reference
before gb_message_send() with this comment "/* Reference will
be dropped when message has been sent. */". Therefore, we
should drop the got reference not only in the error branch,
but also in the complete branch.

Signed-off-by: Lv Yunlong <lyl2019@...l.ustc.edu.cn>
---
 drivers/greybus/operation.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/greybus/operation.c b/drivers/greybus/operation.c
index 8459e9bc0749..500b3fe53a04 100644
--- a/drivers/greybus/operation.c
+++ b/drivers/greybus/operation.c
@@ -855,6 +855,10 @@ static int gb_operation_response_send(struct gb_operation *operation,
 	if (ret)
 		goto err_put_active;
 
+	/*Drop reference after message send completes. */
+	gb_operation_put_active(operation);
+	gb_operation_put(operation);
+
 	return 0;
 
 err_put_active:
-- 
2.25.1