samsung-zeroltexx: Copied/adapted patch to set random MAC address instead of...

samsung-zeroltexx: Copied/adapted patch to set random MAC address instead of 00:00:00:00:00:00 for rndis connection.

device/testing/linux-samsung-zeroltexx/0007-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch

+From 2e32a401ea5df22ab899f4da3e5e1b448b2df51a Mon Sep 17 00:00:00 2001
+From: Alexey Min <alexey.min@gmail.com>
+Date: Thu, 7 Mar 2019 17:25:48 +0300
+Subject: [PATCH 5/6] usb_gadget: set random rndis host MAC address to prevent
+ zero address
+
+This fixes zero host MAC:
+
+rndis0: MAC f6:45:91:9b:4e:43
+rndis0: HOST MAC 00:00:00:00:00:00
+
+and allows devive to automatically obtain IP addrest on PC host side
+zero MAC address prevented interface from autoconfiguring
+---
+ drivers/usb/gadget/function/u_ether.c | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c
+index bf8b64d904c..9ce3ab6de34 100644
+--- a/drivers/usb/gadget/u_ether.c
++++ b/drivers/usb/gadget/u_ether.c
+@@ -1224,8 +1224,16 @@
+	dev_warn(&g->dev,
+	    "using random %s ethernet address\n", "self");
+ #ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
+-	memcpy(dev->host_mac, ethaddr, ETH_ALEN);
+-	printk(KERN_DEBUG "usb: set unique host mac\n");
++    if ((ethaddr[0] == 0x00) && (ethaddr[1] == 0x00) &&
++        (ethaddr[2] == 0x00) && (ethaddr[3] == 0x00) &&
++        (ethaddr[4] == 0x00) && (ethaddr[5] == 0x00)) {
++        printk(KERN_DEBUG "%s: no unique host MAC was set, generate random\n", __func__);
++        /* we can use random_ether_addr() from include/linux/etherdevice.h */
++        random_ether_addr(ethaddr);
++    } else {
++        printk(KERN_DEBUG "%s: set unique host mac\n", __func__);
++    }
++    memcpy(dev->host_mac, ethaddr, ETH_ALEN);
+ #else
+    if (get_ether_addr(host_addr, dev->host_mac))
+	dev_warn(&g->dev,

device/testing/linux-samsung-zeroltexx/APKBUILD

@@ -24,6 +24,7 @@ source="
 	03-fix-fimc-is-firmware-path.patch
 	Makefile_fix_paths.patch
 	gcc10-extern_YYLOC_global_declaration.patch
+	0007-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch
 "
 
 builddir="$srcdir/$_repository-$_commit"
@@ -58,4 +59,5 @@ sha512sums="1f8917dfaf01865cbc0385579cad1565dcb1ec4445bbeaf3e70d0bd8a6a572a45781
 9afbb020311f0bf8043f021292d0f05041ff4e29003bf2114dfc31906869f44dbf15ff560170bc9e9baf62d7bb4ed73d58415212fecac6f1bdd6886783b0fcc1  02-fix-wifi-firmware-path.patch
 c98a074f46376936493b74285632cf38818bdb9d5e7b70b5b291aa8774711a93f352cb569d856215ebc75a33f819a8ce6cd5ccbee506d0a81141938924cf45e3  03-fix-fimc-is-firmware-path.patch
 00aac98cfbaa68bd30c41622b12f38106f6595e2d74ee5cdd05add56f03facb4db45deb43b5df997143b54497d621b9fc5bae7207898c70df0672ebb482c4b46  Makefile_fix_paths.patch
-2b48f1bf0e3f70703d2cdafc47d5e615cc7c56c70bec56b2e3297d3fa4a7a1321d649a8679614553dde8fe52ff1051dae38d5990e3744c9ca986d92187dcdbeb  gcc10-extern_YYLOC_global_declaration.patch"
+2b48f1bf0e3f70703d2cdafc47d5e615cc7c56c70bec56b2e3297d3fa4a7a1321d649a8679614553dde8fe52ff1051dae38d5990e3744c9ca986d92187dcdbeb  gcc10-extern_YYLOC_global_declaration.patch
+8684da1ef7032cb2160c9b071b2bf8cb57a31f5527ee3f6e9e3b58fa485a0ff244e3bc85446c8b09f5b5cec7d1a3f92da681f63495728aaa547438c93eb375d5  0007-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch"