Date: Mon, 2 Apr 2018 23:44:12 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331899 - stable/11/sys/dev/usb/net Message-ID: <201804022344.w32NiCvF071727@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: gonzo Date: Mon Apr 2 23:44:12 2018 New Revision: 331899 URL: https://svnweb.freebsd.org/changeset/base/331899 Log: MFC r325048: Fix MAC address detection regression introduced by r324184 To accomodate all variaties of Pi DTS files floating around we look for MAC address property either in DTS node for USB ethernet (if it exists) or at predefined path ".../usb/hub/ethernet". After r324184 smsc_fdt_find_eth_node started to return node with compatibility string "usb424,ec00" as an eth node. In imported GNU dts files this node still does not have MAC address related property, and therefor following check for "mac-address" and "local-mac-address" fails. To make this logic more robust do not just search for the node but also make sure it has required property, so if node with accepted compatibility string exists but doesn't have the property we fall back to looking for hardoded path mentioned above. Modified: stable/11/sys/dev/usb/net/if_smsc.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/usb/net/if_smsc.c ============================================================================== --- stable/11/sys/dev/usb/net/if_smsc.c Mon Apr 2 23:40:50 2018 (r331898) +++ stable/11/sys/dev/usb/net/if_smsc.c Mon Apr 2 23:44:12 2018 (r331899) @@ -1637,6 +1637,37 @@ smsc_fdt_find_eth_node_by_path(phandle_t start) return (-1); } +/* + * Look through known names that can contain mac address + * return 0 if valid MAC address has been found + */ +static int +smsc_fdt_read_mac_property(phandle_t node, unsigned char *mac) +{ + int len; + + /* Check if there is property */ + if ((len = OF_getproplen(node, "local-mac-address")) > 0) { + if (len != ETHER_ADDR_LEN) + return (EINVAL); + + OF_getprop(node, "local-mac-address", mac, + ETHER_ADDR_LEN); + return (0); + } + + if ((len = OF_getproplen(node, "mac-address")) > 0) { + if (len != ETHER_ADDR_LEN) + return (EINVAL); + + OF_getprop(node, "mac-address", mac, + ETHER_ADDR_LEN); + return (0); + } + + return (ENXIO); +} + /** * Get MAC address from FDT blob. Firmware or loader should fill * mac-address or local-mac-address property. Returns 0 if MAC address @@ -1646,37 +1677,22 @@ static int smsc_fdt_find_mac(unsigned char *mac) { phandle_t node, root; - int len; root = OF_finddevice("/"); node = smsc_fdt_find_eth_node(root); + if (node != -1) { + if (smsc_fdt_read_mac_property(node, mac) == 0) + return (0); + } + /* * If it's not FreeBSD FDT blob for RPi, try more * generic .../usb/hub/ethernet */ - if (node == -1) - node = smsc_fdt_find_eth_node_by_path(root); + node = smsc_fdt_find_eth_node_by_path(root); - if (node != -1) { - /* Check if there is property */ - if ((len = OF_getproplen(node, "local-mac-address")) > 0) { - if (len != ETHER_ADDR_LEN) - return (EINVAL); - - OF_getprop(node, "local-mac-address", mac, - ETHER_ADDR_LEN); - return (0); - } - - if ((len = OF_getproplen(node, "mac-address")) > 0) { - if (len != ETHER_ADDR_LEN) - return (EINVAL); - - OF_getprop(node, "mac-address", mac, - ETHER_ADDR_LEN); - return (0); - } - } + if (node != -1) + return smsc_fdt_read_mac_property(node, mac); return (ENXIO); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201804022344.w32NiCvF071727>