linux-kernel - [PATCH v3 3/5] soc: qcom: smd: Refactor channel open and close handling

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Message-Id: <1455777546-19280-4-git-send-email-bjorn.andersson@linaro.org>
Date:	Wed, 17 Feb 2016 22:39:04 -0800
From:	Bjorn Andersson <bjorn.andersson@...aro.org>
To:	Andy Gross <andy.gross@...aro.org>,
	David Brown <david.brown@...aro.org>
Cc:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Fengwei Yin <fengwei.yin@...aro.org>,
	linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>
Subject: [PATCH v3 3/5] soc: qcom: smd: Refactor channel open and close handling

From: Bjorn Andersson <bjorn.andersson@...ymobile.com>

Refactor opening and closing of channels into two separate functions
instead of open coding this in the various places.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---

Changes since v2:
- None

Changes since v1:
- New patch

 drivers/soc/qcom/smd.c | 62 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 40 insertions(+), 22 deletions(-)

diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index e8972ddfee85..d253e5cc233f 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -808,18 +808,12 @@ static int qcom_smd_dev_match(struct device *dev, struct device_driver *drv)
 }
 
 /*
- * Probe the smd client.
- *
- * The remote side have indicated that it want the channel to be opened, so
- * complete the state handshake and probe our client driver.
+ * Helper for opening a channel
  */
-static int qcom_smd_dev_probe(struct device *dev)
+static int qcom_smd_channel_open(struct qcom_smd_channel *channel,
+				 qcom_smd_cb_t cb)
 {
-	struct qcom_smd_device *qsdev = to_smd_device(dev);
-	struct qcom_smd_driver *qsdrv = to_smd_driver(dev);
-	struct qcom_smd_channel *channel = qsdev->channel;
 	size_t bb_size;
-	int ret;
 
 	/*
 	 * Packets are maximum 4k, but reduce if the fifo is smaller
@@ -829,11 +823,44 @@ static int qcom_smd_dev_probe(struct device *dev)
 	if (!channel->bounce_buffer)
 		return -ENOMEM;
 
-	qcom_smd_channel_set_callback(channel, qsdrv->callback);
+	qcom_smd_channel_set_callback(channel, cb);
 	qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENING);
-
 	qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENED);
 
+	return 0;
+}
+
+/*
+ * Helper for closing and resetting a channel
+ */
+static void qcom_smd_channel_close(struct qcom_smd_channel *channel)
+{
+	qcom_smd_channel_set_callback(channel, NULL);
+
+	kfree(channel->bounce_buffer);
+	channel->bounce_buffer = NULL;
+
+	qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED);
+	qcom_smd_channel_reset(channel);
+}
+
+/*
+ * Probe the smd client.
+ *
+ * The remote side have indicated that it want the channel to be opened, so
+ * complete the state handshake and probe our client driver.
+ */
+static int qcom_smd_dev_probe(struct device *dev)
+{
+	struct qcom_smd_device *qsdev = to_smd_device(dev);
+	struct qcom_smd_driver *qsdrv = to_smd_driver(dev);
+	struct qcom_smd_channel *channel = qsdev->channel;
+	int ret;
+
+	ret = qcom_smd_channel_open(channel, qsdrv->callback);
+	if (ret)
+		return ret;
+
 	ret = qsdrv->probe(qsdev);
 	if (ret)
 		goto err;
@@ -845,11 +872,7 @@ static int qcom_smd_dev_probe(struct device *dev)
 err:
 	dev_err(&qsdev->dev, "probe failed\n");
 
-	qcom_smd_channel_set_callback(channel, NULL);
-	kfree(channel->bounce_buffer);
-	channel->bounce_buffer = NULL;
-
-	qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED);
+	qcom_smd_channel_close(channel);
 	return ret;
 }
 
@@ -886,12 +909,7 @@ static int qcom_smd_dev_remove(struct device *dev)
 	 * The client is now gone, cleanup and reset the channel state.
 	 */
 	channel->qsdev = NULL;
-	kfree(channel->bounce_buffer);
-	channel->bounce_buffer = NULL;
-
-	qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED);
-
-	qcom_smd_channel_reset(channel);
+	qcom_smd_channel_close(channel);
 
 	return 0;
 }
-- 
2.5.0