qed: Revise alloc/setup/free flow

Re-organize the logic that allocates and frees memory of various
sub-components of the hw-function -

 a. No need to pass pointers to said structure as parameters;
    The internal logic knows exactly where to find/set the data.

 b. Nullify pointers after cleanup to prevent possible errors to
    re-entrant code.

Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_dcbx.c

@@ -923,6 +923,7 @@ int qed_dcbx_info_alloc(struct qed_hwfn *p_hwfn)
 void qed_dcbx_info_free(struct qed_hwfn *p_hwfn)
 {
 	kfree(p_hwfn->p_dcbx_info);
+	p_hwfn->p_dcbx_info = NULL;
 }
 
 static void qed_dcbx_update_protocol_data(struct protocol_dcb_data *p_data,

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -161,6 +161,7 @@ void qed_resc_free(struct qed_dev *cdev)
 	cdev->fw_data = NULL;
 
 	kfree(cdev->reset_stats);
+	cdev->reset_stats = NULL;
 
 	for_each_hwfn(cdev, i) {
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
@@ -168,18 +169,18 @@ void qed_resc_free(struct qed_dev *cdev)
 		qed_cxt_mngr_free(p_hwfn);
 		qed_qm_info_free(p_hwfn);
 		qed_spq_free(p_hwfn);
-		qed_eq_free(p_hwfn, p_hwfn->p_eq);
-		qed_consq_free(p_hwfn, p_hwfn->p_consq);
+		qed_eq_free(p_hwfn);
+		qed_consq_free(p_hwfn);
 		qed_int_free(p_hwfn);
 #ifdef CONFIG_QED_LL2
-		qed_ll2_free(p_hwfn, p_hwfn->p_ll2_info);
+		qed_ll2_free(p_hwfn);
 #endif
 		if (p_hwfn->hw_info.personality == QED_PCI_FCOE)
-			qed_fcoe_free(p_hwfn, p_hwfn->p_fcoe_info);
+			qed_fcoe_free(p_hwfn);
 
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
-			qed_iscsi_free(p_hwfn, p_hwfn->p_iscsi_info);
-			qed_ooo_free(p_hwfn, p_hwfn->p_ooo_info);
+			qed_iscsi_free(p_hwfn);
+			qed_ooo_free(p_hwfn);
 		}
 		qed_iov_free(p_hwfn);
 		qed_dmae_info_free(p_hwfn);
@@ -843,15 +844,7 @@ alloc_err:
 
 int qed_resc_alloc(struct qed_dev *cdev)
 {
-	struct qed_iscsi_info *p_iscsi_info;
-	struct qed_fcoe_info *p_fcoe_info;
-	struct qed_ooo_info *p_ooo_info;
-#ifdef CONFIG_QED_LL2
-	struct qed_ll2_info *p_ll2_info;
-#endif
 	u32 rdma_tasks, excess_tasks;
-	struct qed_consq *p_consq;
-	struct qed_eq *p_eq;
 	u32 line_count;
 	int i, rc = 0;
 
@@ -956,45 +949,38 @@ int qed_resc_alloc(struct qed_dev *cdev)
 			DP_ERR(p_hwfn,
 			       "Cannot allocate 0x%x EQ elements. The maximum of a u16 chain is 0x%x\n",
 			       n_eqes, 0xFFFF);
-			rc = -EINVAL;
-			goto alloc_err;
+			goto alloc_no_mem;
 		}
 
-		p_eq = qed_eq_alloc(p_hwfn, (u16) n_eqes);
-		if (!p_eq)
-			goto alloc_no_mem;
-		p_hwfn->p_eq = p_eq;
+		rc = qed_eq_alloc(p_hwfn, (u16) n_eqes);
+		if (rc)
+			goto alloc_err;
 
-		p_consq = qed_consq_alloc(p_hwfn);
-		if (!p_consq)
-			goto alloc_no_mem;
-		p_hwfn->p_consq = p_consq;
+		rc = qed_consq_alloc(p_hwfn);
+		if (rc)
+			goto alloc_err;
 
 #ifdef CONFIG_QED_LL2
 		if (p_hwfn->using_ll2) {
-			p_ll2_info = qed_ll2_alloc(p_hwfn);
-			if (!p_ll2_info)
-				goto alloc_no_mem;
-			p_hwfn->p_ll2_info = p_ll2_info;
+			rc = qed_ll2_alloc(p_hwfn);
+			if (rc)
+				goto alloc_err;
 		}
 #endif
 
 		if (p_hwfn->hw_info.personality == QED_PCI_FCOE) {
-			p_fcoe_info = qed_fcoe_alloc(p_hwfn);
-			if (!p_fcoe_info)
-				goto alloc_no_mem;
-			p_hwfn->p_fcoe_info = p_fcoe_info;
+			rc = qed_fcoe_alloc(p_hwfn);
+			if (rc)
+				goto alloc_err;
 		}
 
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
-			p_iscsi_info = qed_iscsi_alloc(p_hwfn);
-			if (!p_iscsi_info)
-				goto alloc_no_mem;
-			p_hwfn->p_iscsi_info = p_iscsi_info;
-			p_ooo_info = qed_ooo_alloc(p_hwfn);
-			if (!p_ooo_info)
-				goto alloc_no_mem;
-			p_hwfn->p_ooo_info = p_ooo_info;
+			rc = qed_iscsi_alloc(p_hwfn);
+			if (rc)
+				goto alloc_err;
+			rc = qed_ooo_alloc(p_hwfn);
+			if (rc)
+				goto alloc_err;
 		}
 
 		/* DMA info initialization */
@@ -1033,8 +1019,8 @@ void qed_resc_setup(struct qed_dev *cdev)
 
 		qed_cxt_mngr_setup(p_hwfn);
 		qed_spq_setup(p_hwfn);
-		qed_eq_setup(p_hwfn, p_hwfn->p_eq);
-		qed_consq_setup(p_hwfn, p_hwfn->p_consq);
+		qed_eq_setup(p_hwfn);
+		qed_consq_setup(p_hwfn);
 
 		/* Read shadow of current MFW mailbox */
 		qed_mcp_read_mb(p_hwfn, p_hwfn->p_main_ptt);
@@ -1047,14 +1033,14 @@ void qed_resc_setup(struct qed_dev *cdev)
 		qed_iov_setup(p_hwfn, p_hwfn->p_main_ptt);
 #ifdef CONFIG_QED_LL2
 		if (p_hwfn->using_ll2)
-			qed_ll2_setup(p_hwfn, p_hwfn->p_ll2_info);
+			qed_ll2_setup(p_hwfn);
 #endif
 		if (p_hwfn->hw_info.personality == QED_PCI_FCOE)
-			qed_fcoe_setup(p_hwfn, p_hwfn->p_fcoe_info);
+			qed_fcoe_setup(p_hwfn);
 
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
-			qed_iscsi_setup(p_hwfn, p_hwfn->p_iscsi_info);
-			qed_ooo_setup(p_hwfn, p_hwfn->p_ooo_info);
+			qed_iscsi_setup(p_hwfn);
+			qed_ooo_setup(p_hwfn);
 		}
 	}
 }
@@ -1968,6 +1954,7 @@ static void qed_hw_hwfn_free(struct qed_hwfn *p_hwfn)
 {
 	qed_ptt_pool_free(p_hwfn);
 	kfree(p_hwfn->hw_info.p_igu_info);
+	p_hwfn->hw_info.p_igu_info = NULL;
 }
 
 /* Setup bar access */

drivers/net/ethernet/qlogic/qed/qed_fcoe.c

@@ -538,7 +538,7 @@ static void __iomem *qed_fcoe_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
 	}
 }
 
-struct qed_fcoe_info *qed_fcoe_alloc(struct qed_hwfn *p_hwfn)
+int qed_fcoe_alloc(struct qed_hwfn *p_hwfn)
 {
 	struct qed_fcoe_info *p_fcoe_info;
 
@@ -546,19 +546,21 @@ struct qed_fcoe_info *qed_fcoe_alloc(struct qed_hwfn *p_hwfn)
 	p_fcoe_info = kzalloc(sizeof(*p_fcoe_info), GFP_KERNEL);
 	if (!p_fcoe_info) {
 		DP_NOTICE(p_hwfn, "Failed to allocate qed_fcoe_info'\n");
-		return NULL;
+		return -ENOMEM;
 	}
 	INIT_LIST_HEAD(&p_fcoe_info->free_list);
-	return p_fcoe_info;
+
+	p_hwfn->p_fcoe_info = p_fcoe_info;
+	return 0;
 }
 
-void qed_fcoe_setup(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info)
+void qed_fcoe_setup(struct qed_hwfn *p_hwfn)
 {
 	struct fcoe_task_context *p_task_ctx = NULL;
 	int rc;
 	u32 i;
 
-	spin_lock_init(&p_fcoe_info->lock);
+	spin_lock_init(&p_hwfn->p_fcoe_info->lock);
 	for (i = 0; i < p_hwfn->pf_params.fcoe_pf_params.num_tasks; i++) {
 		rc = qed_cxt_get_task_ctx(p_hwfn, i,
 					  QED_CTX_WORKING_MEM,
@@ -576,15 +578,15 @@ void qed_fcoe_setup(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info)
 	}
 }
 
-void qed_fcoe_free(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info)
+void qed_fcoe_free(struct qed_hwfn *p_hwfn)
 {
 	struct qed_fcoe_conn *p_conn = NULL;
 
-	if (!p_fcoe_info)
+	if (!p_hwfn->p_fcoe_info)
 		return;
 
-	while (!list_empty(&p_fcoe_info->free_list)) {
-		p_conn = list_first_entry(&p_fcoe_info->free_list,
+	while (!list_empty(&p_hwfn->p_fcoe_info->free_list)) {
+		p_conn = list_first_entry(&p_hwfn->p_fcoe_info->free_list,
 					  struct qed_fcoe_conn, list_entry);
 		if (!p_conn)
 			break;
@@ -592,7 +594,8 @@ void qed_fcoe_free(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info)
 		qed_fcoe_free_connection(p_hwfn, p_conn);
 	}
 
-	kfree(p_fcoe_info);
+	kfree(p_hwfn->p_fcoe_info);
+	p_hwfn->p_fcoe_info = NULL;
 }
 
 static int

drivers/net/ethernet/qlogic/qed/qed_fcoe.h

@@ -49,29 +49,21 @@ struct qed_fcoe_info {
 };
 
 #if IS_ENABLED(CONFIG_QED_FCOE)
-struct qed_fcoe_info *qed_fcoe_alloc(struct qed_hwfn *p_hwfn);
+int qed_fcoe_alloc(struct qed_hwfn *p_hwfn);
 
-void qed_fcoe_setup(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info);
+void qed_fcoe_setup(struct qed_hwfn *p_hwfn);
 
-void qed_fcoe_free(struct qed_hwfn *p_hwfn, struct qed_fcoe_info *p_fcoe_info);
+void qed_fcoe_free(struct qed_hwfn *p_hwfn);
 void qed_get_protocol_stats_fcoe(struct qed_dev *cdev,
 				 struct qed_mcp_fcoe_stats *stats);
 #else /* CONFIG_QED_FCOE */
-static inline struct qed_fcoe_info *
-qed_fcoe_alloc(struct qed_hwfn *p_hwfn)
+static inline int qed_fcoe_alloc(struct qed_hwfn *p_hwfn)
 {
-	return NULL;
+	return -EINVAL;
 }
 
-static inline void qed_fcoe_setup(struct qed_hwfn *p_hwfn,
-				  struct qed_fcoe_info *p_fcoe_info)
-{
-}
-
-static inline void qed_fcoe_free(struct qed_hwfn *p_hwfn,
-				 struct qed_fcoe_info *p_fcoe_info)
-{
-}
+static inline void qed_fcoe_setup(struct qed_hwfn *p_hwfn) {}
+static inline void qed_fcoe_free(struct qed_hwfn *p_hwfn) {}
 
 static inline void qed_get_protocol_stats_fcoe(struct qed_dev *cdev,
 					       struct qed_mcp_fcoe_stats *stats)

drivers/net/ethernet/qlogic/qed/qed_init_ops.c

@@ -158,6 +158,7 @@ int qed_init_alloc(struct qed_hwfn *p_hwfn)
 				    GFP_KERNEL);
 	if (!rt_data->init_val) {
 		kfree(rt_data->b_valid);
+		rt_data->b_valid = NULL;
 		return -ENOMEM;
 	}
 
@@ -167,7 +168,9 @@ int qed_init_alloc(struct qed_hwfn *p_hwfn)
 void qed_init_free(struct qed_hwfn *p_hwfn)
 {
 	kfree(p_hwfn->rt_data.init_val);
+	p_hwfn->rt_data.init_val = NULL;
 	kfree(p_hwfn->rt_data.b_valid);
+	p_hwfn->rt_data.b_valid = NULL;
 }
 
 static int qed_init_array_dmae(struct qed_hwfn *p_hwfn,
@@ -525,6 +528,7 @@ int qed_init_run(struct qed_hwfn *p_hwfn,
 	}
 
 	kfree(p_hwfn->unzip_buf);
+	p_hwfn->unzip_buf = NULL;
 	return rc;
 }
 

drivers/net/ethernet/qlogic/qed/qed_int.c

@@ -2328,6 +2328,7 @@ static void qed_int_sb_attn_free(struct qed_hwfn *p_hwfn)
 				  SB_ATTN_ALIGNED_SIZE(p_hwfn),
 				  p_sb->sb_attn, p_sb->sb_phys);
 	kfree(p_sb);
+	p_hwfn->p_sb_attn = NULL;
 }
 
 static void qed_int_sb_attn_setup(struct qed_hwfn *p_hwfn,
@@ -2679,6 +2680,7 @@ static void qed_int_sp_sb_free(struct qed_hwfn *p_hwfn)
 				  p_sb->sb_info.sb_virt,
 				  p_sb->sb_info.sb_phys);
 	kfree(p_sb);
+	p_hwfn->p_sp_sb = NULL;
 }
 
 static int qed_int_sp_sb_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
@@ -3157,6 +3159,7 @@ static int qed_int_sp_dpc_alloc(struct qed_hwfn *p_hwfn)
 static void qed_int_sp_dpc_free(struct qed_hwfn *p_hwfn)
 {
 	kfree(p_hwfn->sp_dpc);
+	p_hwfn->sp_dpc = NULL;
 }
 
 int qed_int_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)

drivers/net/ethernet/qlogic/qed/qed_iscsi.c

@@ -818,29 +818,32 @@ void qed_iscsi_free_connection(struct qed_hwfn *p_hwfn,
 	kfree(p_conn);
 }
 
-struct qed_iscsi_info *qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
+int qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
 {
 	struct qed_iscsi_info *p_iscsi_info;
 
 	p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
 	if (!p_iscsi_info)
-		return NULL;
+		return -ENOMEM;
 
 	INIT_LIST_HEAD(&p_iscsi_info->free_list);
-	return p_iscsi_info;
+
+	p_hwfn->p_iscsi_info = p_iscsi_info;
+	return 0;
 }
 
-void qed_iscsi_setup(struct qed_hwfn *p_hwfn,
-		     struct qed_iscsi_info *p_iscsi_info)
+void qed_iscsi_setup(struct qed_hwfn *p_hwfn)
 {
-	spin_lock_init(&p_iscsi_info->lock);
+	spin_lock_init(&p_hwfn->p_iscsi_info->lock);
 }
 
-void qed_iscsi_free(struct qed_hwfn *p_hwfn,
-		    struct qed_iscsi_info *p_iscsi_info)
+void qed_iscsi_free(struct qed_hwfn *p_hwfn)
 {
 	struct qed_iscsi_conn *p_conn = NULL;
 
+	if (!p_hwfn->p_iscsi_info)
+		return;
+
 	while (!list_empty(&p_hwfn->p_iscsi_info->free_list)) {
 		p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 					  struct qed_iscsi_conn, list_entry);
@@ -850,7 +853,8 @@ void qed_iscsi_free(struct qed_hwfn *p_hwfn,
 		}
 	}
 
-	kfree(p_iscsi_info);
+	kfree(p_hwfn->p_iscsi_info);
+	p_hwfn->p_iscsi_info = NULL;
 }
 
 static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,

drivers/net/ethernet/qlogic/qed/qed_iscsi.h

@@ -57,13 +57,11 @@ extern const struct qed_ll2_ops qed_ll2_ops_pass;
 #endif
 
 #if IS_ENABLED(CONFIG_QED_ISCSI)
-struct qed_iscsi_info *qed_iscsi_alloc(struct qed_hwfn *p_hwfn);
+int qed_iscsi_alloc(struct qed_hwfn *p_hwfn);
 
-void qed_iscsi_setup(struct qed_hwfn *p_hwfn,
-		     struct qed_iscsi_info *p_iscsi_info);
+void qed_iscsi_setup(struct qed_hwfn *p_hwfn);
 
-void qed_iscsi_free(struct qed_hwfn *p_hwfn,
-		    struct qed_iscsi_info *p_iscsi_info);
+void qed_iscsi_free(struct qed_hwfn *p_hwfn);
 
 /**
  * @brief - Fills provided statistics struct with statistics.
@@ -74,12 +72,15 @@ void qed_iscsi_free(struct qed_hwfn *p_hwfn,
 void qed_get_protocol_stats_iscsi(struct qed_dev *cdev,
 				  struct qed_mcp_iscsi_stats *stats);
 #else /* IS_ENABLED(CONFIG_QED_ISCSI) */
-static inline struct qed_iscsi_info *qed_iscsi_alloc(
-		struct qed_hwfn *p_hwfn) { return NULL; }
-static inline void qed_iscsi_setup(struct qed_hwfn *p_hwfn,
-				   struct qed_iscsi_info *p_iscsi_info) {}
-static inline void qed_iscsi_free(struct qed_hwfn *p_hwfn,
-				 struct qed_iscsi_info *p_iscsi_info) {}
+static inline int qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
+{
+	return -EINVAL;
+}
+
+static inline void qed_iscsi_setup(struct qed_hwfn *p_hwfn) {}
+
+static inline void qed_iscsi_free(struct qed_hwfn *p_hwfn) {}
+
 static inline void
 qed_get_protocol_stats_iscsi(struct qed_dev *cdev,
 			     struct qed_mcp_iscsi_stats *stats) {}

drivers/net/ethernet/qlogic/qed/qed_ll2.c

@@ -1920,7 +1920,7 @@ void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
 	mutex_unlock(&p_ll2_conn->mutex);
 }
 
-struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn)
+int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
 {
 	struct qed_ll2_info *p_ll2_connections;
 	u8 i;
@@ -1930,28 +1930,31 @@ struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn)
 				    sizeof(struct qed_ll2_info), GFP_KERNEL);
 	if (!p_ll2_connections) {
 		DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
-		return NULL;
+		return -ENOMEM;
 	}
 
 	for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
 		p_ll2_connections[i].my_id = i;
 
-	return p_ll2_connections;
+	p_hwfn->p_ll2_info = p_ll2_connections;
+	return 0;
 }
 
-void qed_ll2_setup(struct qed_hwfn *p_hwfn,
-		   struct qed_ll2_info *p_ll2_connections)
+void qed_ll2_setup(struct qed_hwfn *p_hwfn)
 {
 	int i;
 
 	for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
-		mutex_init(&p_ll2_connections[i].mutex);
+		mutex_init(&p_hwfn->p_ll2_info[i].mutex);
 }
 
-void qed_ll2_free(struct qed_hwfn *p_hwfn,
-		  struct qed_ll2_info *p_ll2_connections)
+void qed_ll2_free(struct qed_hwfn *p_hwfn)
 {
-	kfree(p_ll2_connections);
+	if (!p_hwfn->p_ll2_info)
+		return;
+
+	kfree(p_hwfn->p_ll2_info);
+	p_hwfn->p_ll2_info = NULL;
 }
 
 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,

drivers/net/ethernet/qlogic/qed/qed_ll2.h

@@ -306,27 +306,24 @@ int qed_ll2_get_stats(struct qed_hwfn *p_hwfn,
  *
  * @param p_hwfn
  *
- * @return pointer to alocated qed_ll2_info or NULL
+ * @return int
  */
-struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn);
+int qed_ll2_alloc(struct qed_hwfn *p_hwfn);
 
 /**
  * @brief qed_ll2_setup - Inits LL2 connections set
  *
  * @param p_hwfn
- * @param p_ll2_connections
  *
  */
-void qed_ll2_setup(struct qed_hwfn *p_hwfn,
-		   struct qed_ll2_info *p_ll2_connections);
+void qed_ll2_setup(struct qed_hwfn *p_hwfn);
 
 /**
  * @brief qed_ll2_free - Releases LL2 connections set
  *
  * @param p_hwfn
- * @param p_ll2_connections
  *
  */
-void qed_ll2_free(struct qed_hwfn *p_hwfn,
-		  struct qed_ll2_info *p_ll2_connections);
+void qed_ll2_free(struct qed_hwfn *p_hwfn);
+
 #endif

drivers/net/ethernet/qlogic/qed/qed_mcp.c

@@ -177,6 +177,7 @@ int qed_mcp_free(struct qed_hwfn *p_hwfn)
 	}
 
 	kfree(p_hwfn->mcp_info);
+	p_hwfn->mcp_info = NULL;
 
 	return 0;
 }

drivers/net/ethernet/qlogic/qed/qed_ooo.c

@@ -99,7 +99,7 @@ void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
 	p_history->head_idx++;
 }
 
-struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn)
+int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
 {
 	u16 max_num_archipelagos = 0, cid_base;
 	struct qed_ooo_info *p_ooo_info;
@@ -109,7 +109,7 @@ struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn)
 	if (p_hwfn->hw_info.personality != QED_PCI_ISCSI) {
 		DP_NOTICE(p_hwfn,
 			  "Failed to allocate qed_ooo_info: unknown personality\n");
-		return NULL;
+		return -EINVAL;
 	}
 
 	max_num_archipelagos = p_hwfn->pf_params.iscsi_pf_params.num_cons;
@@ -119,12 +119,12 @@ struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn)
 	if (!max_num_archipelagos) {
 		DP_NOTICE(p_hwfn,
 			  "Failed to allocate qed_ooo_info: unknown amount of connections\n");
-		return NULL;
+		return -EINVAL;
 	}
 
 	p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
 	if (!p_ooo_info)
-		return NULL;
+		return -ENOMEM;
 
 	p_ooo_info->cid_base = cid_base;
 	p_ooo_info->max_num_archipelagos = max_num_archipelagos;
@@ -164,7 +164,8 @@ struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn)
 
 	p_ooo_info->ooo_history.num_of_cqes = QED_MAX_NUM_OOO_HISTORY_ENTRIES;
 
-	return p_ooo_info;
+	p_hwfn->p_ooo_info = p_ooo_info;
+	return 0;
 
 no_history_mem:
 	kfree(p_ooo_info->p_archipelagos_mem);
@@ -172,7 +173,7 @@ no_archipelagos_mem:
 	kfree(p_ooo_info->p_isles_mem);
 no_isles_mem:
 	kfree(p_ooo_info);
-	return NULL;
+	return -ENOMEM;
 }
 
 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
@@ -249,19 +250,23 @@ void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
 				      &p_ooo_info->free_buffers_list);
 }
 
-void qed_ooo_setup(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info)
+void qed_ooo_setup(struct qed_hwfn *p_hwfn)
 {
-	qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
-	memset(p_ooo_info->ooo_history.p_cqes, 0,
-	       p_ooo_info->ooo_history.num_of_cqes *
+	qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
+	memset(p_hwfn->p_ooo_info->ooo_history.p_cqes, 0,
+	       p_hwfn->p_ooo_info->ooo_history.num_of_cqes *
 	       sizeof(struct ooo_opaque));
-	p_ooo_info->ooo_history.head_idx = 0;
+	p_hwfn->p_ooo_info->ooo_history.head_idx = 0;
 }
 
-void qed_ooo_free(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info)
+void qed_ooo_free(struct qed_hwfn *p_hwfn)
 {
+	struct qed_ooo_info *p_ooo_info  = p_hwfn->p_ooo_info;
 	struct qed_ooo_buffer *p_buffer;
 
+	if (!p_ooo_info)
+		return;
+
 	qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
 	while (!list_empty(&p_ooo_info->free_buffers_list)) {
 		p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
@@ -282,6 +287,7 @@ void qed_ooo_free(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info)
 	kfree(p_ooo_info->p_archipelagos_mem);
 	kfree(p_ooo_info->ooo_history.p_cqes);
 	kfree(p_ooo_info);
+	p_hwfn->p_ooo_info = NULL;
 }
 
 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,

drivers/net/ethernet/qlogic/qed/qed_ooo.h

@@ -88,7 +88,11 @@ void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
 				struct qed_ooo_info *p_ooo_info,
 				struct ooo_opaque *p_cqe);
 
-struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn);
+int qed_ooo_alloc(struct qed_hwfn *p_hwfn);
+
+void qed_ooo_setup(struct qed_hwfn *p_hwfn);
+
+void qed_ooo_free(struct qed_hwfn *p_hwfn);
 
 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
 				      struct qed_ooo_info *p_ooo_info,
@@ -97,10 +101,6 @@ void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
 void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
 			       struct qed_ooo_info *p_ooo_info);
 
-void qed_ooo_setup(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info);
-
-void qed_ooo_free(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info);
-
 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
 			     struct qed_ooo_info *p_ooo_info,
 			     struct qed_ooo_buffer *p_buffer);
@@ -140,8 +140,14 @@ static inline void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
 					      struct qed_ooo_info *p_ooo_info,
 					      struct ooo_opaque *p_cqe) {}
 
-static inline struct qed_ooo_info *qed_ooo_alloc(
-				struct qed_hwfn *p_hwfn) { return NULL; }
+static inline int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
+{
+	return -EINVAL;
+}
+
+static inline void qed_ooo_setup(struct qed_hwfn *p_hwfn) {}
+
+static inline void qed_ooo_free(struct qed_hwfn *p_hwfn) {}
 
 static inline void
 qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
@@ -152,12 +158,6 @@ static inline void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
 					     struct qed_ooo_info *p_ooo_info)
 					     {}
 
-static inline void qed_ooo_setup(struct qed_hwfn *p_hwfn,
-				 struct qed_ooo_info *p_ooo_info) {}
-
-static inline void qed_ooo_free(struct qed_hwfn *p_hwfn,
-				struct qed_ooo_info *p_ooo_info) {}
-
 static inline void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
 					   struct qed_ooo_info *p_ooo_info,
 					   struct qed_ooo_buffer *p_buffer) {}

drivers/net/ethernet/qlogic/qed/qed_sp.h

@@ -270,28 +270,23 @@ void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
  * @param p_hwfn
  * @param num_elem number of elements in the eq
  *
- * @return struct qed_eq* - a newly allocated structure; NULL upon error.
+ * @return int
  */
-struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
-			    u16 num_elem);
+int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem);
 
 /**
- * @brief qed_eq_setup - Reset the SPQ to its start state.
+ * @brief qed_eq_setup - Reset the EQ to its start state.
  *
  * @param p_hwfn
- * @param p_eq
  */
-void qed_eq_setup(struct qed_hwfn *p_hwfn,
-		  struct qed_eq *p_eq);
+void qed_eq_setup(struct qed_hwfn *p_hwfn);
 
 /**
- * @brief qed_eq_deallocate - deallocates the given EQ struct.
+ * @brief qed_eq_free - deallocates the given EQ struct.
  *
  * @param p_hwfn
- * @param p_eq
  */
-void qed_eq_free(struct qed_hwfn *p_hwfn,
-		 struct qed_eq *p_eq);
+void qed_eq_free(struct qed_hwfn *p_hwfn);
 
 /**
  * @brief qed_eq_prod_update - update the FW with default EQ producer
@@ -342,28 +337,23 @@ u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);
  *
  * @param p_hwfn
  *
- * @return struct qed_eq* - a newly allocated structure; NULL upon error.
+ * @return int
  */
-struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);
+int qed_consq_alloc(struct qed_hwfn *p_hwfn);
 
 /**
- * @brief qed_consq_setup - Reset the ConsQ to its start
- *        state.
+ * @brief qed_consq_setup - Reset the ConsQ to its start state.
  *
  * @param p_hwfn
- * @param p_eq
  */
-void qed_consq_setup(struct qed_hwfn *p_hwfn,
-		     struct qed_consq *p_consq);
+void qed_consq_setup(struct qed_hwfn *p_hwfn);
 
 /**
  * @brief qed_consq_free - deallocates the given ConsQ struct.
  *
  * @param p_hwfn
- * @param p_eq
  */
-void qed_consq_free(struct qed_hwfn *p_hwfn,
-		    struct qed_consq *p_consq);
+void qed_consq_free(struct qed_hwfn *p_hwfn);
 
 /**
  * @file

drivers/net/ethernet/qlogic/qed/qed_spq.c

@@ -403,14 +403,14 @@ int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 	return rc;
 }
 
-struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
+int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 {
 	struct qed_eq *p_eq;
 
 	/* Allocate EQ struct */
 	p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL);
 	if (!p_eq)
-		return NULL;
+		return -ENOMEM;
 
 	/* Allocate and initialize EQ chain*/
 	if (qed_chain_alloc(p_hwfn->cdev,
@@ -426,24 +426,28 @@ struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 	qed_int_register_cb(p_hwfn, qed_eq_completion,
 			    p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
 
-	return p_eq;
+	p_hwfn->p_eq = p_eq;
+	return 0;
 
 eq_allocate_fail:
-	qed_eq_free(p_hwfn, p_eq);
-	return NULL;
-}
-
-void qed_eq_setup(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq)
-{
-	qed_chain_reset(&p_eq->chain);
-}
-
-void qed_eq_free(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq)
-{
-	if (!p_eq)
-		return;
-	qed_chain_free(p_hwfn->cdev, &p_eq->chain);
 	kfree(p_eq);
+	return -ENOMEM;
+}
+
+void qed_eq_setup(struct qed_hwfn *p_hwfn)
+{
+	qed_chain_reset(&p_hwfn->p_eq->chain);
+}
+
+void qed_eq_free(struct qed_hwfn *p_hwfn)
+{
+	if (!p_hwfn->p_eq)
+		return;
+
+	qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain);
+
+	kfree(p_hwfn->p_eq);
+	p_hwfn->p_eq = NULL;
 }
 
 /***************************************************************************
@@ -583,8 +587,8 @@ void qed_spq_free(struct qed_hwfn *p_hwfn)
 	}
 
 	qed_chain_free(p_hwfn->cdev, &p_spq->chain);
-	;
 	kfree(p_spq);
+	p_hwfn->p_spq = NULL;
 }
 
 int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent)
@@ -934,14 +938,14 @@ int qed_spq_completion(struct qed_hwfn *p_hwfn,
 	return rc;
 }
 
-struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn)
+int qed_consq_alloc(struct qed_hwfn *p_hwfn)
 {
 	struct qed_consq *p_consq;
 
 	/* Allocate ConsQ struct */
 	p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL);
 	if (!p_consq)
-		return NULL;
+		return -ENOMEM;
 
 	/* Allocate and initialize EQ chain*/
 	if (qed_chain_alloc(p_hwfn->cdev,
@@ -952,22 +956,26 @@ struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn)
 			    0x80, &p_consq->chain))
 		goto consq_allocate_fail;
 
-	return p_consq;
+	p_hwfn->p_consq = p_consq;
+	return 0;
 
 consq_allocate_fail:
-	qed_consq_free(p_hwfn, p_consq);
-	return NULL;
-}
-
-void qed_consq_setup(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq)
-{
-	qed_chain_reset(&p_consq->chain);
-}
-
-void qed_consq_free(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq)
-{
-	if (!p_consq)
-		return;
-	qed_chain_free(p_hwfn->cdev, &p_consq->chain);
 	kfree(p_consq);
+	return -ENOMEM;
+}
+
+void qed_consq_setup(struct qed_hwfn *p_hwfn)
+{
+	qed_chain_reset(&p_hwfn->p_consq->chain);
+}
+
+void qed_consq_free(struct qed_hwfn *p_hwfn)
+{
+	if (!p_hwfn->p_consq)
+		return;
+
+	qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain);
+
+	kfree(p_hwfn->p_consq);
+	p_hwfn->p_consq = NULL;
 }