linux-kernel - [PATCH 1/2] staging: greybus: operation: add private data with get/set accessors

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Message-Id: <1509852459-5847-2-git-send-email-pure.logic@nexus-software.ie>
Date:   Sun,  5 Nov 2017 03:27:38 +0000
From:   Bryan O'Donoghue <pure.logic@...us-software.ie>
To:     johan@...nel.org, elder@...nel.org, gregkh@...uxfoundation.org,
        devel@...verdev.osuosl.org, keescook@...omium.org,
        linux-kernel@...r.kernel.org
Cc:     Bryan O'Donoghue <pure.logic@...us-software.ie>,
        greybus-dev@...ts.linaro.org
Subject: [PATCH 1/2] staging: greybus: operation: add private data with get/set accessors

Asynchronous operation completion handler's lives are made easier if there
is a generic pointer that can store private data associated with the
operation. This patch adds a pointer field to operation.h and get/set
methods to access that pointer.

Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
Cc: Johan Hovold <johan@...nel.org>
Cc: Alex Elder <elder@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: greybus-dev@...ts.linaro.org
Cc: devel@...verdev.osuosl.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/staging/greybus/operation.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/staging/greybus/operation.h b/drivers/staging/greybus/operation.h
index 7529f01..bfec1e9 100644
--- a/drivers/staging/greybus/operation.h
+++ b/drivers/staging/greybus/operation.h
@@ -105,6 +105,8 @@ struct gb_operation {
 
 	int			active;
 	struct list_head	links;		/* connection->operations */
+
+	void			*private;
 };
 
 static inline bool
@@ -206,6 +208,17 @@ static inline int gb_operation_unidirectional(struct gb_connection *connection,
 			request, request_size, GB_OPERATION_TIMEOUT_DEFAULT);
 }
 
+static inline void *gb_operation_get_data(struct gb_operation *operation)
+{
+	return operation->private;
+}
+
+static inline void gb_operation_set_data(struct gb_operation *operation,
+					 void *data)
+{
+	operation->private = data;
+}
+
 int gb_operation_init(void);
 void gb_operation_exit(void);
 
-- 
2.7.4