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Date: Sun, 20 Aug 2017 04:19:36 +0800
From: kbuild test robot <lkp@...el.com>
To: Larry Finger <Larry.Finger@...inger.net>
Cc: kbuild-all@...org, gregkh@...uxfoundation.org,
devel@...verdev.osuosl.org, Ping-Ke Shih <pkshih@...ltek.com>,
Yan-Hsuan Chuang <yhchuang@...ltek.com>,
netdev@...r.kernel.org, Birming Chiu <birming@...ltek.com>,
Shaofu <shaofu@...ltek.com>,
Steven Ting <steventing@...ltek.com>,
Larry Finger <Larry.Finger@...inger.net>
Subject: Re: [PATCH 7/8] staging: r8822be: Add Makefiles and Kconfig for new
driver
Hi Larry,
[auto build test WARNING on staging/staging-testing]
[also build test WARNING on v4.13-rc5 next-20170817]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Larry-Finger/staging-r8822be-Add-existing-rtlwifi-and-rtl_pci-parts-for-new-driver/20170820-023830
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/staging/rtlwifi/base.c: In function 'rtl_check_beacon_key':
>> drivers/staging/rtlwifi/base.c:2546:34: warning: 'ht_cap_ie' may be used uninitialized in this function [-Wmaybe-uninitialized]
bcn_key.ht_cap_info = ht_cap_ie->cap_info;
~~~~~~~~~^~~~~~~~~~
vim +/ht_cap_ie +2546 drivers/staging/rtlwifi/base.c
128be9f8 Ping-Ke Shih 2017-08-17 2465
128be9f8 Ping-Ke Shih 2017-08-17 2466 bool rtl_check_beacon_key(struct ieee80211_hw *hw, void *data, unsigned int len)
128be9f8 Ping-Ke Shih 2017-08-17 2467 {
128be9f8 Ping-Ke Shih 2017-08-17 2468 struct rtl_priv *rtlpriv = rtl_priv(hw);
128be9f8 Ping-Ke Shih 2017-08-17 2469 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
128be9f8 Ping-Ke Shih 2017-08-17 2470 struct rtl_phy *rtlphy = &rtlpriv->phy;
128be9f8 Ping-Ke Shih 2017-08-17 2471 struct ieee80211_hdr *hdr = data;
128be9f8 Ping-Ke Shih 2017-08-17 2472 struct ieee80211_ht_cap *ht_cap_ie;
128be9f8 Ping-Ke Shih 2017-08-17 2473 struct ieee80211_ht_operation *ht_oper_ie = NULL;
128be9f8 Ping-Ke Shih 2017-08-17 2474 struct rtl_beacon_keys bcn_key;
128be9f8 Ping-Ke Shih 2017-08-17 2475 struct rtl_beacon_keys *cur_bcn_key;
128be9f8 Ping-Ke Shih 2017-08-17 2476 u8 *ht_cap;
128be9f8 Ping-Ke Shih 2017-08-17 2477 u8 ht_cap_len;
128be9f8 Ping-Ke Shih 2017-08-17 2478 u8 *ht_oper;
128be9f8 Ping-Ke Shih 2017-08-17 2479 u8 ht_oper_len;
128be9f8 Ping-Ke Shih 2017-08-17 2480 u8 *ds_param;
128be9f8 Ping-Ke Shih 2017-08-17 2481 u8 ds_param_len;
128be9f8 Ping-Ke Shih 2017-08-17 2482
128be9f8 Ping-Ke Shih 2017-08-17 2483 if (mac->opmode != NL80211_IFTYPE_STATION)
128be9f8 Ping-Ke Shih 2017-08-17 2484 return false;
128be9f8 Ping-Ke Shih 2017-08-17 2485
128be9f8 Ping-Ke Shih 2017-08-17 2486 /* check if this really is a beacon*/
128be9f8 Ping-Ke Shih 2017-08-17 2487 if (!ieee80211_is_beacon(hdr->frame_control))
128be9f8 Ping-Ke Shih 2017-08-17 2488 return false;
128be9f8 Ping-Ke Shih 2017-08-17 2489
128be9f8 Ping-Ke Shih 2017-08-17 2490 /* min. beacon length + FCS_LEN */
128be9f8 Ping-Ke Shih 2017-08-17 2491 if (len <= 40 + FCS_LEN)
128be9f8 Ping-Ke Shih 2017-08-17 2492 return false;
128be9f8 Ping-Ke Shih 2017-08-17 2493
128be9f8 Ping-Ke Shih 2017-08-17 2494 cur_bcn_key = &mac->cur_beacon_keys;
128be9f8 Ping-Ke Shih 2017-08-17 2495
128be9f8 Ping-Ke Shih 2017-08-17 2496 if (rtlpriv->mac80211.link_state == MAC80211_NOLINK) {
128be9f8 Ping-Ke Shih 2017-08-17 2497 if (cur_bcn_key->valid) {
128be9f8 Ping-Ke Shih 2017-08-17 2498 cur_bcn_key->valid = false;
128be9f8 Ping-Ke Shih 2017-08-17 2499 RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
128be9f8 Ping-Ke Shih 2017-08-17 2500 "Reset cur_beacon_keys.valid to false!\n");
128be9f8 Ping-Ke Shih 2017-08-17 2501 }
128be9f8 Ping-Ke Shih 2017-08-17 2502 return false;
128be9f8 Ping-Ke Shih 2017-08-17 2503 }
128be9f8 Ping-Ke Shih 2017-08-17 2504
128be9f8 Ping-Ke Shih 2017-08-17 2505 /* and only beacons from the associated BSSID, please */
128be9f8 Ping-Ke Shih 2017-08-17 2506 if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
128be9f8 Ping-Ke Shih 2017-08-17 2507 return false;
128be9f8 Ping-Ke Shih 2017-08-17 2508
128be9f8 Ping-Ke Shih 2017-08-17 2509 /***** Parsing DS Param IE ******/
128be9f8 Ping-Ke Shih 2017-08-17 2510 ds_param = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_DS_PARAMS);
128be9f8 Ping-Ke Shih 2017-08-17 2511
128be9f8 Ping-Ke Shih 2017-08-17 2512 if (ds_param && !(ds_param[1] < sizeof(*ds_param)))
128be9f8 Ping-Ke Shih 2017-08-17 2513 ds_param_len = ds_param[1];
128be9f8 Ping-Ke Shih 2017-08-17 2514 else
128be9f8 Ping-Ke Shih 2017-08-17 2515 ds_param = NULL;
128be9f8 Ping-Ke Shih 2017-08-17 2516
128be9f8 Ping-Ke Shih 2017-08-17 2517 /***** Parsing HT Cap. IE ******/
128be9f8 Ping-Ke Shih 2017-08-17 2518 ht_cap = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_CAPABILITY);
128be9f8 Ping-Ke Shih 2017-08-17 2519
128be9f8 Ping-Ke Shih 2017-08-17 2520 if (ht_cap && !(ht_cap[1] < sizeof(*ht_cap))) {
128be9f8 Ping-Ke Shih 2017-08-17 2521 ht_cap_len = ht_cap[1];
128be9f8 Ping-Ke Shih 2017-08-17 2522 ht_cap_ie = (struct ieee80211_ht_cap *)&ht_cap[2];
128be9f8 Ping-Ke Shih 2017-08-17 2523 } else {
128be9f8 Ping-Ke Shih 2017-08-17 2524 ht_cap = NULL;
128be9f8 Ping-Ke Shih 2017-08-17 2525 }
128be9f8 Ping-Ke Shih 2017-08-17 2526
128be9f8 Ping-Ke Shih 2017-08-17 2527 /***** Parsing HT Info. IE ******/
128be9f8 Ping-Ke Shih 2017-08-17 2528 ht_oper = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_OPERATION);
128be9f8 Ping-Ke Shih 2017-08-17 2529
128be9f8 Ping-Ke Shih 2017-08-17 2530 if (ht_oper && !(ht_oper[1] < sizeof(*ht_oper))) {
128be9f8 Ping-Ke Shih 2017-08-17 2531 ht_oper_len = ht_oper[1];
128be9f8 Ping-Ke Shih 2017-08-17 2532 ht_oper_ie = (struct ieee80211_ht_operation *)&ht_oper[2];
128be9f8 Ping-Ke Shih 2017-08-17 2533 } else {
128be9f8 Ping-Ke Shih 2017-08-17 2534 ht_oper = NULL;
128be9f8 Ping-Ke Shih 2017-08-17 2535 }
128be9f8 Ping-Ke Shih 2017-08-17 2536
128be9f8 Ping-Ke Shih 2017-08-17 2537 /* update bcn_key */
128be9f8 Ping-Ke Shih 2017-08-17 2538 memset(&bcn_key, 0, sizeof(bcn_key));
128be9f8 Ping-Ke Shih 2017-08-17 2539
128be9f8 Ping-Ke Shih 2017-08-17 2540 if (ds_param)
128be9f8 Ping-Ke Shih 2017-08-17 2541 bcn_key.bcn_channel = ds_param[2];
128be9f8 Ping-Ke Shih 2017-08-17 2542 else if (ht_oper && ht_oper_ie)
128be9f8 Ping-Ke Shih 2017-08-17 2543 bcn_key.bcn_channel = ht_oper_ie->primary_chan;
128be9f8 Ping-Ke Shih 2017-08-17 2544
128be9f8 Ping-Ke Shih 2017-08-17 2545 if (ht_cap)
128be9f8 Ping-Ke Shih 2017-08-17 @2546 bcn_key.ht_cap_info = ht_cap_ie->cap_info;
128be9f8 Ping-Ke Shih 2017-08-17 2547
128be9f8 Ping-Ke Shih 2017-08-17 2548 if (ht_oper && ht_oper_ie)
128be9f8 Ping-Ke Shih 2017-08-17 2549 bcn_key.ht_info_infos_0_sco = ht_oper_ie->ht_param & 0x03;
128be9f8 Ping-Ke Shih 2017-08-17 2550
128be9f8 Ping-Ke Shih 2017-08-17 2551 bcn_key.valid = true;
128be9f8 Ping-Ke Shih 2017-08-17 2552
128be9f8 Ping-Ke Shih 2017-08-17 2553 /* update cur_beacon_keys or compare beacon key */
128be9f8 Ping-Ke Shih 2017-08-17 2554 if ((rtlpriv->mac80211.link_state != MAC80211_LINKED) &&
128be9f8 Ping-Ke Shih 2017-08-17 2555 (rtlpriv->mac80211.link_state != MAC80211_LINKED_SCANNING))
128be9f8 Ping-Ke Shih 2017-08-17 2556 return true;
128be9f8 Ping-Ke Shih 2017-08-17 2557
128be9f8 Ping-Ke Shih 2017-08-17 2558 if (!cur_bcn_key->valid) {
128be9f8 Ping-Ke Shih 2017-08-17 2559 /* update cur_beacon_keys */
128be9f8 Ping-Ke Shih 2017-08-17 2560 memset(cur_bcn_key, 0, sizeof(bcn_key));
128be9f8 Ping-Ke Shih 2017-08-17 2561 memcpy(cur_bcn_key, &bcn_key, sizeof(bcn_key));
128be9f8 Ping-Ke Shih 2017-08-17 2562 cur_bcn_key->valid = true;
128be9f8 Ping-Ke Shih 2017-08-17 2563
128be9f8 Ping-Ke Shih 2017-08-17 2564 RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
128be9f8 Ping-Ke Shih 2017-08-17 2565 "Beacon key update!ch=%d, ht_cap_info=0x%x, sco=0x%x\n",
128be9f8 Ping-Ke Shih 2017-08-17 2566 cur_bcn_key->bcn_channel,
128be9f8 Ping-Ke Shih 2017-08-17 2567 cur_bcn_key->ht_cap_info,
128be9f8 Ping-Ke Shih 2017-08-17 2568 cur_bcn_key->ht_info_infos_0_sco);
128be9f8 Ping-Ke Shih 2017-08-17 2569 return true;
128be9f8 Ping-Ke Shih 2017-08-17 2570 }
128be9f8 Ping-Ke Shih 2017-08-17 2571
128be9f8 Ping-Ke Shih 2017-08-17 2572 /* compare beacon key */
128be9f8 Ping-Ke Shih 2017-08-17 2573 if (!memcmp(cur_bcn_key, &bcn_key, sizeof(bcn_key))) {
128be9f8 Ping-Ke Shih 2017-08-17 2574 /* same beacon key */
128be9f8 Ping-Ke Shih 2017-08-17 2575 mac->new_beacon_cnt = 0;
128be9f8 Ping-Ke Shih 2017-08-17 2576 goto chk_exit;
128be9f8 Ping-Ke Shih 2017-08-17 2577 }
128be9f8 Ping-Ke Shih 2017-08-17 2578
128be9f8 Ping-Ke Shih 2017-08-17 2579 if ((cur_bcn_key->bcn_channel == bcn_key.bcn_channel) &&
128be9f8 Ping-Ke Shih 2017-08-17 2580 (cur_bcn_key->ht_cap_info == bcn_key.ht_cap_info)) {
128be9f8 Ping-Ke Shih 2017-08-17 2581 /* Beacon HT info IE, secondary channel offset check */
128be9f8 Ping-Ke Shih 2017-08-17 2582 /* 40M -> 20M */
128be9f8 Ping-Ke Shih 2017-08-17 2583 if (cur_bcn_key->ht_info_infos_0_sco >
128be9f8 Ping-Ke Shih 2017-08-17 2584 bcn_key.ht_info_infos_0_sco) {
128be9f8 Ping-Ke Shih 2017-08-17 2585 /* Not a new beacon */
128be9f8 Ping-Ke Shih 2017-08-17 2586 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2587 "Beacon BW change! sco:0x%x -> 0x%x\n",
128be9f8 Ping-Ke Shih 2017-08-17 2588 cur_bcn_key->ht_info_infos_0_sco,
128be9f8 Ping-Ke Shih 2017-08-17 2589 bcn_key.ht_info_infos_0_sco);
128be9f8 Ping-Ke Shih 2017-08-17 2590
128be9f8 Ping-Ke Shih 2017-08-17 2591 cur_bcn_key->ht_info_infos_0_sco =
128be9f8 Ping-Ke Shih 2017-08-17 2592 bcn_key.ht_info_infos_0_sco;
128be9f8 Ping-Ke Shih 2017-08-17 2593 } else {
128be9f8 Ping-Ke Shih 2017-08-17 2594 /* 20M -> 40M */
128be9f8 Ping-Ke Shih 2017-08-17 2595 if (rtlphy->max_ht_chan_bw >= HT_CHANNEL_WIDTH_20_40) {
128be9f8 Ping-Ke Shih 2017-08-17 2596 /* Not a new beacon */
128be9f8 Ping-Ke Shih 2017-08-17 2597 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2598 "Beacon BW change! sco:0x%x -> 0x%x\n",
128be9f8 Ping-Ke Shih 2017-08-17 2599 cur_bcn_key->ht_info_infos_0_sco,
128be9f8 Ping-Ke Shih 2017-08-17 2600 bcn_key.ht_info_infos_0_sco);
128be9f8 Ping-Ke Shih 2017-08-17 2601
128be9f8 Ping-Ke Shih 2017-08-17 2602 cur_bcn_key->ht_info_infos_0_sco =
128be9f8 Ping-Ke Shih 2017-08-17 2603 bcn_key.ht_info_infos_0_sco;
128be9f8 Ping-Ke Shih 2017-08-17 2604 } else {
128be9f8 Ping-Ke Shih 2017-08-17 2605 mac->new_beacon_cnt++;
128be9f8 Ping-Ke Shih 2017-08-17 2606 }
128be9f8 Ping-Ke Shih 2017-08-17 2607 }
128be9f8 Ping-Ke Shih 2017-08-17 2608 } else {
128be9f8 Ping-Ke Shih 2017-08-17 2609 mac->new_beacon_cnt++;
128be9f8 Ping-Ke Shih 2017-08-17 2610 }
128be9f8 Ping-Ke Shih 2017-08-17 2611
128be9f8 Ping-Ke Shih 2017-08-17 2612 if (mac->new_beacon_cnt == 1) {
128be9f8 Ping-Ke Shih 2017-08-17 2613 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2614 "Get new beacon.\n");
128be9f8 Ping-Ke Shih 2017-08-17 2615 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2616 "Cur : ch=%d, ht_cap=0x%x, sco=0x%x\n",
128be9f8 Ping-Ke Shih 2017-08-17 2617 cur_bcn_key->bcn_channel,
128be9f8 Ping-Ke Shih 2017-08-17 2618 cur_bcn_key->ht_cap_info,
128be9f8 Ping-Ke Shih 2017-08-17 2619 cur_bcn_key->ht_info_infos_0_sco);
128be9f8 Ping-Ke Shih 2017-08-17 2620 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2621 "New RX : ch=%d, ht_cap=0x%x, sco=0x%x\n",
128be9f8 Ping-Ke Shih 2017-08-17 2622 bcn_key.bcn_channel,
128be9f8 Ping-Ke Shih 2017-08-17 2623 bcn_key.ht_cap_info,
128be9f8 Ping-Ke Shih 2017-08-17 2624 bcn_key.ht_info_infos_0_sco);
128be9f8 Ping-Ke Shih 2017-08-17 2625
128be9f8 Ping-Ke Shih 2017-08-17 2626 } else if (mac->new_beacon_cnt > 1) {
128be9f8 Ping-Ke Shih 2017-08-17 2627 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2628 "new beacon cnt: %d\n",
128be9f8 Ping-Ke Shih 2017-08-17 2629 mac->new_beacon_cnt);
128be9f8 Ping-Ke Shih 2017-08-17 2630 }
128be9f8 Ping-Ke Shih 2017-08-17 2631
128be9f8 Ping-Ke Shih 2017-08-17 2632 if (mac->new_beacon_cnt > 3) {
128be9f8 Ping-Ke Shih 2017-08-17 2633 ieee80211_connection_loss(rtlpriv->mac80211.vif);
128be9f8 Ping-Ke Shih 2017-08-17 2634 RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
128be9f8 Ping-Ke Shih 2017-08-17 2635 "new beacon cnt >3, disconnect !\n");
128be9f8 Ping-Ke Shih 2017-08-17 2636 }
128be9f8 Ping-Ke Shih 2017-08-17 2637
128be9f8 Ping-Ke Shih 2017-08-17 2638 chk_exit:
128be9f8 Ping-Ke Shih 2017-08-17 2639
128be9f8 Ping-Ke Shih 2017-08-17 2640 return true;
128be9f8 Ping-Ke Shih 2017-08-17 2641 }
128be9f8 Ping-Ke Shih 2017-08-17 2642
:::::: The code at line 2546 was first introduced by commit
:::::: 128be9f870de0930fb2643e40a20c96d8d3d7fa3 staging: r8822be: Add existing rtlwifi and rtl_pci parts for new driver
:::::: TO: Ping-Ke Shih <pkshih@...ltek.com>
:::::: CC: 0day robot <fengguang.wu@...el.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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