diff mbox series

[v4,2/2] kni: fix warning about discarding const qualifier

Message ID 20220608111359.1234110-3-andrew.rybchenko@oktetlabs.ru (mailing list archive)
State Superseded, archived
Delegated to: Andrew Rybchenko
Headers
Series kni: fix build warnings with Linux 5.17+ |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail Compilation issues
ci/intel-Testing success Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-aarch64-compile-testing success Testing PASS
ci/iol-aarch64-unit-testing success Testing PASS
ci/iol-x86_64-compile-testing success Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/iol-abi-testing success Testing PASS

Commit Message

Andrew Rybchenko June 8, 2022, 11:13 a.m. UTC 
  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 mbox series

Patch

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);