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From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: Ferruh Yigit <ferruh.yigit@xilinx.com>,
	Stephen Hemminger <stephen@networkplumber.org>
Cc: dev@dpdk.org, Min Hu <humin29@huawei.com>,
	Ke Zhang <ke1x.zhang@intel.com>,
	stable@dpdk.org
Subject: [PATCH v4 2/2] kni: fix warning about discarding const qualifier
Date: Wed,  8 Jun 2022 14:13:59 +0300	[thread overview]
Message-ID: <20220608111359.1234110-3-andrew.rybchenko@oktetlabs.ru> (raw)
In-Reply-To: <20220608111359.1234110-1-andrew.rybchenko@oktetlabs.ru>

From: Ke Zhang <ke1x.zhang@intel.com>

The warning info:
warning: passing argument 1 of ‘memcpy’ discards ‘const’
qualifier from pointer target type

Variable dev_addr is done const intentionally in v5.17 to prevent using
it directly. See kernel series [1] for more information.

[1] https://lore.kernel.org/netdev/YZYAb4X%2FVQFy0iks@shredder/T/

Fixes: ea6b39b5b847 ("kni: remove ethtool support")
Cc: stable@dpdk.org

Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
 kernel/linux/kni/compat.h   | 4 ++++
 kernel/linux/kni/kni_misc.c | 9 +++++++--
 kernel/linux/kni/kni_net.c  | 4 ++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/kernel/linux/kni/compat.h b/kernel/linux/kni/compat.h
index 0db29a4a6f..2c8f346ddf 100644
--- a/kernel/linux/kni/compat.h
+++ b/kernel/linux/kni/compat.h
@@ -145,3 +145,7 @@
 #if KERNEL_VERSION(5, 18, 0) > LINUX_VERSION_CODE
 #define HAVE_NETIF_RX_NI
 #endif
+
+#if KERNEL_VERSION(5, 15, 0) <= LINUX_VERSION_CODE
+#define HAVE_ETH_HW_ADDR_SET
+#endif
diff --git a/kernel/linux/kni/kni_misc.c b/kernel/linux/kni/kni_misc.c
index 4f6dd373a3..0c3a86ee35 100644
--- a/kernel/linux/kni/kni_misc.c
+++ b/kernel/linux/kni/kni_misc.c
@@ -402,11 +402,16 @@ kni_ioctl_create(struct net *net, uint32_t ioctl_num,
 	pr_debug("mbuf_size:    %u\n", kni->mbuf_size);
 
 	/* if user has provided a valid mac address */
-	if (is_valid_ether_addr(dev_info.mac_addr))
+	if (is_valid_ether_addr(dev_info.mac_addr)) {
+#ifdef HAVE_ETH_HW_ADDR_SET
+		eth_hw_addr_set(net_dev, dev_info.mac_addr);
+#else
 		memcpy(net_dev->dev_addr, dev_info.mac_addr, ETH_ALEN);
-	else
+#endif
+	} else {
 		/* Assign random MAC address. */
 		eth_hw_addr_random(net_dev);
+	}
 
 	if (dev_info.mtu)
 		net_dev->mtu = dev_info.mtu;
diff --git a/kernel/linux/kni/kni_net.c b/kernel/linux/kni/kni_net.c
index 41805fcabf..6257dcb1a8 100644
--- a/kernel/linux/kni/kni_net.c
+++ b/kernel/linux/kni/kni_net.c
@@ -783,7 +783,11 @@ kni_net_set_mac(struct net_device *netdev, void *p)
 		return -EADDRNOTAVAIL;
 
 	memcpy(req.mac_addr, addr->sa_data, netdev->addr_len);
+#ifdef HAVE_ETH_HW_ADDR_SET
+	eth_hw_addr_set(net_dev, addr->sa_data);
+#else
 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+#endif
 
 	ret = kni_net_process_request(netdev, &req);
 
-- 
2.30.2


  parent reply	other threads:[~2022-06-08 11:14 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-31  9:13 [PATCH] examples/kni: clear " Ke Zhang
2022-05-31 14:55 ` Stephen Hemminger
2022-06-01  5:45 ` [PATCH v2] " Ke Zhang
2022-06-01 15:44   ` Ferruh Yigit
2022-06-05  9:47 ` [PATCH v3 1/2] kni: use dedicated function to set random MAC address Andrew Rybchenko
2022-06-05  9:47   ` [PATCH v3 2/2] kni: fix warning about discarding const qualifier Andrew Rybchenko
2022-06-08 11:13 ` [PATCH v4 0/2] kni: fix build warnings with Linux 5.17+ Andrew Rybchenko
2022-06-08 11:13   ` [PATCH v4 1/2] kni: use dedicated function to set random MAC address Andrew Rybchenko
2022-06-08 11:13   ` Andrew Rybchenko [this message]
2022-06-08 12:11 ` [PATCH v5 0/2] kni: fix build warnings with Linux 5.17+ Andrew Rybchenko
2022-06-08 12:11   ` [PATCH v5 1/2] kni: use dedicated function to set random MAC address Andrew Rybchenko
2022-06-08 12:52     ` Ferruh Yigit
2022-06-08 12:11   ` [PATCH v5 2/2] kni: fix warning about discarding const qualifier Andrew Rybchenko
2022-06-08 12:54     ` Ferruh Yigit
2022-06-08 13:10       ` Ferruh Yigit
2022-06-08 17:23   ` [PATCH v5 0/2] kni: fix build warnings with Linux 5.17+ Andrew Rybchenko

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