netdev - [PATCH net-next v2 06/17] ethernet: ucc_geth: remove unnecessary memset

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210119150802.19997-7-rasmus.villemoes@prevas.dk>
Date:   Tue, 19 Jan 2021 16:07:51 +0100
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     netdev@...r.kernel.org
Cc:     Li Yang <leoyang.li@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Zhao Qiang <qiang.zhao@....com>, Andrew Lunn <andrew@...n.ch>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Jakub Kicinski <kuba@...nel.org>,
        Joakim Tjernlund <Joakim.Tjernlund@...inera.com>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Subject: [PATCH net-next v2 06/17] ethernet: ucc_geth: remove unnecessary memset_io() calls

These buffers have all just been handed out from qe_muram_alloc(), aka
cpm_muram_alloc(), and the helper cpm_muram_alloc_common() already
does

        memset_io(cpm_muram_addr(start), 0, size);

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
---
 drivers/net/ethernet/freescale/ucc_geth.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index 14c58667992e..be997b559577 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -2506,9 +2506,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 	ugeth->p_tx_glbl_pram =
 	    (struct ucc_geth_tx_global_pram __iomem *) qe_muram_addr(ugeth->
 							tx_glbl_pram_offset);
-	/* Zero out p_tx_glbl_pram */
-	memset_io((void __iomem *)ugeth->p_tx_glbl_pram, 0, sizeof(struct ucc_geth_tx_global_pram));
-
 	/* Fill global PRAM */
 
 	/* TQPTR */
@@ -2596,8 +2593,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 							   scheduler_offset);
 		out_be32(&ugeth->p_tx_glbl_pram->schedulerbasepointer,
 			 ugeth->scheduler_offset);
-		/* Zero out p_scheduler */
-		memset_io((void __iomem *)ugeth->p_scheduler, 0, sizeof(struct ucc_geth_scheduler));
 
 		/* Set values in scheduler */
 		out_be32(&ugeth->p_scheduler->mblinterval,
@@ -2640,9 +2635,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 		ugeth->p_tx_fw_statistics_pram =
 		    (struct ucc_geth_tx_firmware_statistics_pram __iomem *)
 		    qe_muram_addr(ugeth->tx_fw_statistics_pram_offset);
-		/* Zero out p_tx_fw_statistics_pram */
-		memset_io((void __iomem *)ugeth->p_tx_fw_statistics_pram,
-		       0, sizeof(struct ucc_geth_tx_firmware_statistics_pram));
 	}
 
 	/* temoder */
@@ -2675,9 +2667,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 	ugeth->p_rx_glbl_pram =
 	    (struct ucc_geth_rx_global_pram __iomem *) qe_muram_addr(ugeth->
 							rx_glbl_pram_offset);
-	/* Zero out p_rx_glbl_pram */
-	memset_io((void __iomem *)ugeth->p_rx_glbl_pram, 0, sizeof(struct ucc_geth_rx_global_pram));
-
 	/* Fill global PRAM */
 
 	/* RQPTR */
@@ -2715,9 +2704,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 		ugeth->p_rx_fw_statistics_pram =
 		    (struct ucc_geth_rx_firmware_statistics_pram __iomem *)
 		    qe_muram_addr(ugeth->rx_fw_statistics_pram_offset);
-		/* Zero out p_rx_fw_statistics_pram */
-		memset_io((void __iomem *)ugeth->p_rx_fw_statistics_pram, 0,
-		       sizeof(struct ucc_geth_rx_firmware_statistics_pram));
 	}
 
 	/* intCoalescingPtr */
@@ -2803,11 +2789,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 	    (struct ucc_geth_rx_bd_queues_entry __iomem *) qe_muram_addr(ugeth->
 				    rx_bd_qs_tbl_offset);
 	out_be32(&ugeth->p_rx_glbl_pram->rbdqptr, ugeth->rx_bd_qs_tbl_offset);
-	/* Zero out p_rx_bd_qs_tbl */
-	memset_io((void __iomem *)ugeth->p_rx_bd_qs_tbl,
-	       0,
-	       ug_info->numQueuesRx * (sizeof(struct ucc_geth_rx_bd_queues_entry) +
-				       sizeof(struct ucc_geth_rx_prefetched_bds)));
 
 	/* Setup the table */
 	/* Assume BD rings are already established */
-- 
2.23.0