[dpdk-dev] [PATCH v2 4/5] net/bnxt: fix a failure case during initialization

[Kalesh A P <kalesh-anakkur.purayil@broadcom.com>]

From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

During initialization sequence in bnxt_alloc_mem()
if bnxt_alloc_async_cp_ring() fails, driver invokes bnxt_free_mem()
which in turn call bnxt_free_vnic_mem() which causes the error logs
"bnxt_free_vnic_mem(): VNIC is not freed yet!". This is because
vnic memory is allocated but not initialized yet.

Fix this by moving bnxt_init_vnics() from bnxt_init_nic() to
bnxt_alloc_vnic_mem(). Also get rid of bnxt_init_nic() as the
initialization is done in respective functions now.

Fixes: 1bf01f5135f8 ("net/bnxt: prevent device access when device is in reset")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 18 ------------------
 drivers/net/bnxt/bnxt_filter.c |  3 ++-
 drivers/net/bnxt/bnxt_filter.h |  1 -
 drivers/net/bnxt/bnxt_ring.c   |  5 ++---
 drivers/net/bnxt/bnxt_ring.h   |  1 -
 drivers/net/bnxt/bnxt_vnic.c   |  5 +++--
 drivers/net/bnxt/bnxt_vnic.h   |  1 -
 7 files changed, 7 insertions(+), 27 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 3acf66d..b9b055e 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -479,22 +479,6 @@ static int bnxt_shutdown_nic(struct bnxt *bp)
 	return 0;
 }
 
-static int bnxt_init_nic(struct bnxt *bp)
-{
-	int rc;
-
-	if (BNXT_HAS_RING_GRPS(bp)) {
-		rc = bnxt_init_ring_grps(bp);
-		if (rc)
-			return rc;
-	}
-
-	bnxt_init_vnics(bp);
-	bnxt_init_filters(bp);
-
-	return 0;
-}
-
 /*
  * Device configuration and status function
  */
@@ -4665,8 +4649,6 @@ static int bnxt_init_resources(struct bnxt *bp, bool reconfig_dev)
 	if (rc)
 		return rc;
 
-	bnxt_init_nic(bp);
-
 	rc = bnxt_request_int(bp);
 	if (rc)
 		return rc;
diff --git a/drivers/net/bnxt/bnxt_filter.c b/drivers/net/bnxt/bnxt_filter.c
index 7e29468..da1a6c2 100644
--- a/drivers/net/bnxt/bnxt_filter.c
+++ b/drivers/net/bnxt/bnxt_filter.c
@@ -61,7 +61,7 @@ struct bnxt_filter_info *bnxt_alloc_vf_filter(struct bnxt *bp, uint16_t vf)
 	return filter;
 }
 
-void bnxt_init_filters(struct bnxt *bp)
+static void bnxt_init_filters(struct bnxt *bp)
 {
 	struct bnxt_filter_info *filter;
 	int i, max_filters;
@@ -171,6 +171,7 @@ int bnxt_alloc_filter_mem(struct bnxt *bp)
 		return -ENOMEM;
 	}
 	bp->filter_info = filter_mem;
+	bnxt_init_filters(bp);
 	return 0;
 }
 
diff --git a/drivers/net/bnxt/bnxt_filter.h b/drivers/net/bnxt/bnxt_filter.h
index 7415b36..9db3e74 100644
--- a/drivers/net/bnxt/bnxt_filter.h
+++ b/drivers/net/bnxt/bnxt_filter.h
@@ -81,7 +81,6 @@ struct bnxt_filter_info {
 
 struct bnxt_filter_info *bnxt_alloc_filter(struct bnxt *bp);
 struct bnxt_filter_info *bnxt_alloc_vf_filter(struct bnxt *bp, uint16_t vf);
-void bnxt_init_filters(struct bnxt *bp);
 void bnxt_free_all_filters(struct bnxt *bp);
 void bnxt_free_filter_mem(struct bnxt *bp);
 int bnxt_alloc_filter_mem(struct bnxt *bp);
diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index 0a182d3..ea46fa9 100644
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -38,15 +38,13 @@ void bnxt_free_ring(struct bnxt_ring *ring)
  * Ring groups
  */
 
-int bnxt_init_ring_grps(struct bnxt *bp)
+static void bnxt_init_ring_grps(struct bnxt *bp)
 {
 	unsigned int i;
 
 	for (i = 0; i < bp->max_ring_grps; i++)
 		memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
 		       sizeof(struct bnxt_ring_grp_info));
-
-	return 0;
 }
 
 int bnxt_alloc_ring_grps(struct bnxt *bp)
@@ -76,6 +74,7 @@ int bnxt_alloc_ring_grps(struct bnxt *bp)
 				    "Failed to alloc grp info tbl.\n");
 			return -ENOMEM;
 		}
+		bnxt_init_ring_grps(bp);
 	}
 
 	return 0;
diff --git a/drivers/net/bnxt/bnxt_ring.h b/drivers/net/bnxt/bnxt_ring.h
index 8331183..48a39d7 100644
--- a/drivers/net/bnxt/bnxt_ring.h
+++ b/drivers/net/bnxt/bnxt_ring.h
@@ -65,7 +65,6 @@ struct bnxt_tx_ring_info;
 struct bnxt_rx_ring_info;
 struct bnxt_cp_ring_info;
 void bnxt_free_ring(struct bnxt_ring *ring);
-int bnxt_init_ring_grps(struct bnxt *bp);
 int bnxt_alloc_ring_grps(struct bnxt *bp);
 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
 			    struct bnxt_tx_queue *txq,
diff --git a/drivers/net/bnxt/bnxt_vnic.c b/drivers/net/bnxt/bnxt_vnic.c
index 2f0ed10..412a53d 100644
--- a/drivers/net/bnxt/bnxt_vnic.c
+++ b/drivers/net/bnxt/bnxt_vnic.c
@@ -35,7 +35,7 @@ void prandom_bytes(void *dest_ptr, size_t len)
 	}
 }
 
-void bnxt_init_vnics(struct bnxt *bp)
+static void bnxt_init_vnics(struct bnxt *bp)
 {
 	struct bnxt_vnic_info *vnic;
 	uint16_t max_vnics;
@@ -52,7 +52,6 @@ void bnxt_init_vnics(struct bnxt *bp)
 		vnic->hash_mode =
 			HWRM_VNIC_RSS_CFG_INPUT_HASH_MODE_FLAGS_DEFAULT;
 
-		prandom_bytes(vnic->rss_hash_key, HW_HASH_KEY_SIZE);
 		STAILQ_INIT(&vnic->filter);
 		STAILQ_INIT(&vnic->flow_list);
 		STAILQ_INSERT_TAIL(&bp->free_vnic_list, vnic, next);
@@ -179,6 +178,7 @@ int bnxt_alloc_vnic_attributes(struct bnxt *bp)
 				HW_HASH_KEY_SIZE);
 		vnic->mc_list_dma_addr = vnic->rss_hash_key_dma_addr +
 				HW_HASH_KEY_SIZE;
+		prandom_bytes(vnic->rss_hash_key, HW_HASH_KEY_SIZE);
 	}
 
 	return 0;
@@ -220,6 +220,7 @@ int bnxt_alloc_vnic_mem(struct bnxt *bp)
 		return -ENOMEM;
 	}
 	bp->vnic_info = vnic_mem;
+	bnxt_init_vnics(bp);
 	return 0;
 }
 
diff --git a/drivers/net/bnxt/bnxt_vnic.h b/drivers/net/bnxt/bnxt_vnic.h
index 4f760e0..a372b89 100644
--- a/drivers/net/bnxt/bnxt_vnic.h
+++ b/drivers/net/bnxt/bnxt_vnic.h
@@ -58,7 +58,6 @@ struct bnxt_vnic_info {
 };
 
 struct bnxt;
-void bnxt_init_vnics(struct bnxt *bp);
 int bnxt_free_vnic(struct bnxt *bp, struct bnxt_vnic_info *vnic,
 			  int pool);
 struct bnxt_vnic_info *bnxt_alloc_vnic(struct bnxt *bp);
-- 
2.10.1