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From: Ratheesh Kannoth <rkannoth@marvell.com>
To: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
CC: <sgoutham@marvell.com>, <davem@davemloft.net>, <edumazet@google.com>,
        <kuba@kernel.org>, <pabeni@redhat.com>, <sbhatta@marvell.com>,
        <gakula@marvell.com>, <hkelam@marvell.com>, <bcreeley@amd.com>,
        <sumang@marvell.com>, Ratheesh Kannoth <rkannoth@marvell.com>
Subject: [PATCH net v1] octeontx2-af: Initialize bitmap arrays.
Date: Thu, 25 Jan 2024 12:04:14 +0530
Message-ID: <20240125063414.3930526-1-rkannoth@marvell.com>
Precedence: bulk
MIME-Version: 1.0
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kmalloc_array() without __GFP_ZERO flag does not initializes
memory to zero.  This causes issues with bitmap. Use __GFP_ZERO
to fix the issue.

Fixes: dd7842878633 ("octeontx2-af: Add new devlink param to configure maximum usable NIX block LFs")
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>

ChangeLogs:
v0 -> v1: Removed devm_kcalloc()._
---
 .../ethernet/marvell/octeontx2/af/rvu_npc.c   | 20 ++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 167145bdcb75..b56def17a2ba 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -1905,12 +1905,13 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 
 	/* Allocate bitmaps for managing MCAM entries */
 	mcam->bmap = kmalloc_array(BITS_TO_LONGS(mcam->bmap_entries),
-				   sizeof(long), GFP_KERNEL);
+				   sizeof(long), GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->bmap)
 		return -ENOMEM;
 
 	mcam->bmap_reverse = kmalloc_array(BITS_TO_LONGS(mcam->bmap_entries),
-					   sizeof(long), GFP_KERNEL);
+					   sizeof(long),
+					   GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->bmap_reverse)
 		goto free_bmap;
 
@@ -1918,7 +1919,8 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 
 	/* Alloc memory for saving entry to RVU PFFUNC allocation mapping */
 	mcam->entry2pfvf_map = kmalloc_array(mcam->bmap_entries,
-					     sizeof(u16), GFP_KERNEL);
+					     sizeof(u16),
+					     GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->entry2pfvf_map)
 		goto free_bmap_reverse;
 
@@ -1942,7 +1944,8 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 		goto free_entry_map;
 
 	mcam->cntr2pfvf_map = kmalloc_array(mcam->counters.max,
-					    sizeof(u16), GFP_KERNEL);
+					    sizeof(u16),
+					    GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->cntr2pfvf_map)
 		goto free_cntr_bmap;
 
@@ -1950,18 +1953,21 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
 	 * counter's reference count.
 	 */
 	mcam->entry2cntr_map = kmalloc_array(mcam->bmap_entries,
-					     sizeof(u16), GFP_KERNEL);
+					     sizeof(u16),
+					     GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->entry2cntr_map)
 		goto free_cntr_map;
 
 	mcam->cntr_refcnt = kmalloc_array(mcam->counters.max,
-					  sizeof(u16), GFP_KERNEL);
+					  sizeof(u16),
+					  GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->cntr_refcnt)
 		goto free_entry_cntr_map;
 
 	/* Alloc memory for saving target device of mcam rule */
 	mcam->entry2target_pffunc = kmalloc_array(mcam->total_entries,
-						  sizeof(u16), GFP_KERNEL);
+						  sizeof(u16),
+						  GFP_KERNEL | __GFP_ZERO);
 	if (!mcam->entry2target_pffunc)
 		goto free_cntr_refcnt;
 
-- 
2.25.1