From b8bf07567660ebd5b67c434e11d32717b7edce20 Mon Sep 17 00:00:00 2001
From: Camelia Groza <camelia.groza@nxp.com>
Date: Fri, 24 Nov 2017 11:55:51 +0200
Subject: sdk_dpaa: ceetm: coding style fixes and added comments

Signed-off-by: Camelia Groza <camelia.groza@nxp.com>

diff --git a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
index b7362bd..db61c3a 100644
--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
@@ -69,15 +69,17 @@ static void get_dcp_and_sp(struct net_device *dev, enum qm_dc_portal *dcp_id,
 static void ceetm_ern(struct qman_portal *portal, struct qman_fq *fq,
 		      const struct qm_mr_entry *msg)
 {
-	struct net_device *net_dev;
-	struct ceetm_class *cls;
+	struct dpa_percpu_priv_s *dpa_percpu_priv;
 	struct ceetm_class_stats *cstats = NULL;
 	const struct dpa_priv_s *dpa_priv;
-	struct dpa_percpu_priv_s *dpa_percpu_priv;
-	struct sk_buff *skb;
 	struct qm_fd fd = msg->ern.fd;
+	struct net_device *net_dev;
+	struct ceetm_fq *ceetm_fq;
+	struct ceetm_class *cls;
+	struct sk_buff *skb;
 
-	net_dev = ((struct ceetm_fq *)fq)->net_dev;
+	ceetm_fq = container_of(fq, struct ceetm_fq, fq);
+	net_dev = ceetm_fq->net_dev;
 	dpa_priv = netdev_priv(net_dev);
 	dpa_percpu_priv = raw_cpu_ptr(dpa_priv->percpu_priv);
 
@@ -86,7 +88,7 @@ static void ceetm_ern(struct qman_portal *portal, struct qman_fq *fq,
 	dpa_percpu_priv->stats.tx_fifo_errors++;
 
 	/* Increment CEETM counters */
-	cls = ((struct ceetm_fq *)fq)->ceetm_cls;
+	cls = ceetm_fq->ceetm_cls;
 	switch (cls->type) {
 	case CEETM_PRIO:
 		cstats = this_cpu_ptr(cls->prio.cstats);
@@ -99,11 +101,15 @@ static void ceetm_ern(struct qman_portal *portal, struct qman_fq *fq,
 	if (cstats)
 		cstats->ern_drop_count++;
 
+	/* Release the buffers that were supposed to be recycled. */
 	if (fd.bpid != 0xff) {
 		dpa_fd_release(net_dev, &fd);
 		return;
 	}
 
+	/* Release the frames that were supposed to return on the
+	 * confirmation path.
+	 */
 	skb = _dpa_cleanup_tx_fd(dpa_priv, &fd);
 	dev_kfree_skb_any(skb);
 }
@@ -1909,18 +1915,22 @@ static struct ceetm_class *ceetm_classify(struct sk_buff *skb,
 
 int __hot ceetm_tx(struct sk_buff *skb, struct net_device *net_dev)
 {
-	int ret;
-	bool act_drop = false;
+	const int queue_mapping = dpa_get_queue_mapping(skb);
 	struct Qdisc *sch = net_dev->qdisc;
-	struct ceetm_class *cl;
+	struct ceetm_class_stats *cstats;
+	struct ceetm_qdisc_stats *qstats;
 	struct dpa_priv_s *priv_dpa;
 	struct ceetm_fq *ceetm_fq;
+	struct ceetm_qdisc *priv;
 	struct qman_fq *conf_fq;
-	struct ceetm_qdisc *priv = qdisc_priv(sch);
-	struct ceetm_qdisc_stats *qstats = this_cpu_ptr(priv->root.qstats);
-	struct ceetm_class_stats *cstats;
-	const int queue_mapping = dpa_get_queue_mapping(skb);
-	spinlock_t *root_lock = qdisc_lock(sch);
+	struct ceetm_class *cl;
+	spinlock_t *root_lock;
+	bool act_drop = false;
+	int ret;
+
+	root_lock = qdisc_lock(sch);
+	priv = qdisc_priv(sch);
+	qstats = this_cpu_ptr(priv->root.qstats);
 
 	spin_lock(root_lock);
 	cl = ceetm_classify(skb, sch, &ret, &act_drop);
-- 
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