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Date:   Mon, 31 Aug 2020 16:35:57 -0700
From:   Shannon Nelson <snelson@...sando.io>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     Shannon Nelson <snelson@...sando.io>, Neel Patel <neel@...sando.io>
Subject: [PATCH net-next 4/5] ionic: clean up desc_info and cq_info structs

Remove some unnecessary struct fields and related code.

Signed-off-by: Neel Patel <neel@...sando.io>
Signed-off-by: Shannon Nelson <snelson@...sando.io>
---
 .../net/ethernet/pensando/ionic/ionic_dev.c   | 33 ++-----------------
 .../net/ethernet/pensando/ionic/ionic_dev.h   |  6 ----
 .../net/ethernet/pensando/ionic/ionic_txrx.c  |  8 +++--
 3 files changed, 8 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 3645673b4b18..6068f51a11d9 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -467,9 +467,7 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 		  struct ionic_intr_info *intr,
 		  unsigned int num_descs, size_t desc_size)
 {
-	struct ionic_cq_info *cur;
 	unsigned int ring_size;
-	unsigned int i;
 
 	if (desc_size == 0 || !is_power_of_2(num_descs))
 		return -EINVAL;
@@ -485,19 +483,6 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 	cq->tail_idx = 0;
 	cq->done_color = 1;
 
-	cur = cq->info;
-
-	for (i = 0; i < num_descs; i++) {
-		if (i + 1 == num_descs) {
-			cur->next = cq->info;
-			cur->last = true;
-		} else {
-			cur->next = cur + 1;
-		}
-		cur->index = i;
-		cur++;
-	}
-
 	return 0;
 }
 
@@ -551,9 +536,7 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 		 unsigned int num_descs, size_t desc_size,
 		 size_t sg_desc_size, unsigned int pid)
 {
-	struct ionic_desc_info *cur;
 	unsigned int ring_size;
-	unsigned int i;
 
 	if (desc_size == 0 || !is_power_of_2(num_descs))
 		return -EINVAL;
@@ -574,18 +557,6 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 
 	snprintf(q->name, sizeof(q->name), "L%d-%s%u", lif->index, name, index);
 
-	cur = q->info;
-
-	for (i = 0; i < num_descs; i++) {
-		if (i + 1 == num_descs)
-			cur->next = q->info;
-		else
-			cur->next = cur + 1;
-		cur->index = i;
-		cur->left = num_descs - i;
-		cur++;
-	}
-
 	return 0;
 }
 
@@ -652,6 +623,7 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 	struct ionic_desc_info *desc_info;
 	ionic_desc_cb cb;
 	void *cb_arg;
+	u16 index;
 
 	/* check for empty queue */
 	if (q->tail_idx == q->head_idx)
@@ -665,6 +637,7 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 
 	do {
 		desc_info = &q->info[q->tail_idx];
+		index = q->tail_idx;
 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 		cb = desc_info->cb;
@@ -675,5 +648,5 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 
 		if (cb)
 			cb(q, desc_info, cq_info, cb_arg);
-	} while (desc_info->index != stop_index);
+	} while (index != stop_index);
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 87debc512755..21c3ce9ee446 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -156,9 +156,6 @@ struct ionic_cq_info {
 		struct ionic_admin_comp *admincq;
 		struct ionic_notifyq_event *notifyq;
 	};
-	struct ionic_cq_info *next;
-	unsigned int index;
-	bool last;
 };
 
 struct ionic_queue;
@@ -186,9 +183,6 @@ struct ionic_desc_info {
 		struct ionic_txq_sg_desc *txq_sg_desc;
 		struct ionic_rxq_sg_desc *rxq_sgl_desc;
 	};
-	struct ionic_desc_info *next;
-	unsigned int index;
-	unsigned int left;
 	unsigned int npages;
 	struct ionic_page_info pages[IONIC_RX_MAX_SG_ELEMS + 1];
 	ionic_desc_cb cb;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index efc02b366e73..8ba14792616f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -240,10 +240,10 @@ static bool ionic_rx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	if (q->tail_idx == q->head_idx)
 		return false;
 
-	desc_info = &q->info[q->tail_idx];
-	if (desc_info->index != le16_to_cpu(comp->comp_index))
+	if (q->tail_idx != le16_to_cpu(comp->comp_index))
 		return false;
 
+	desc_info = &q->info[q->tail_idx];
 	q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 	/* clean the related q entry, only one per qc completion */
@@ -637,6 +637,7 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	struct ionic_txq_comp *comp = cq_info->cq_desc;
 	struct ionic_queue *q = cq->bound_q;
 	struct ionic_desc_info *desc_info;
+	u16 index;
 
 	if (!color_match(comp->color, cq->done_color))
 		return false;
@@ -646,11 +647,12 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	 */
 	do {
 		desc_info = &q->info[q->tail_idx];
+		index = q->tail_idx;
 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 		ionic_tx_clean(q, desc_info, cq_info, desc_info->cb_arg);
 		desc_info->cb = NULL;
 		desc_info->cb_arg = NULL;
-	} while (desc_info->index != le16_to_cpu(comp->comp_index));
+	} while (index != le16_to_cpu(comp->comp_index));
 
 	return true;
 }
-- 
2.17.1

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