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Date: Sat, 7 May 2022 02:34:47 +0800
From: kernel test robot <lkp@...el.com>
To: Miles Hu <milehu@...eaurora.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Kalle Valo <kvalo@...eaurora.org>,
Aloka Dixit <alokad@...eaurora.org>,
Lavanya Suresh <lavaks@...eaurora.org>,
Pradeep Chitrapu <pradeepc@...eaurora.org>,
Venkateswara Naralasetty <vnaralas@...eaurora.org>,
Jouni Malinen <jouni@...eaurora.org>
Subject: drivers/net/wireless/ath/ath11k/mac.c:1845:9: warning: Local
variable 'i' shadows outer variable [shadowVariable]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4df22ca85d3d73f9822b1a354bb56dd1872180cd
commit: 61fe43e7216df6e9a912d831aafc7142fa20f280 ath11k: add support for setting fixed HE rate/gi/ltf
date: 7 months ago
compiler: aarch64-linux-gcc (GCC) 11.3.0
reproduce (cppcheck warning):
# apt-get install cppcheck
git checkout 61fe43e7216df6e9a912d831aafc7142fa20f280
cppcheck --quiet --enable=style,performance,portability --template=gcc FILE
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
cppcheck warnings: (new ones prefixed by >>)
>> drivers/net/wireless/ath/ath11k/mac.c:1845:9: warning: Local variable 'i' shadows outer variable [shadowVariable]
int i;
^
drivers/net/wireless/ath/ath11k/mac.c:1775:6: note: Shadowed declaration
int i, he_nss, nss_idx;
^
drivers/net/wireless/ath/ath11k/mac.c:1845:9: note: Shadow variable
int i;
^
drivers/net/wireless/ath/ath11k/mac.c:2778:7: warning: Local variable 'preamble' shadows outer variable [shadowVariable]
u32 preamble;
^
drivers/net/wireless/ath/ath11k/mac.c:2637:6: note: Shadowed declaration
u32 preamble;
^
drivers/net/wireless/ath/ath11k/mac.c:2778:7: note: Shadow variable
u32 preamble;
^
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
drivers/net/wireless/ath/ath11k/mac.c:5684:2: warning: Assignment of function parameter has no effect outside the function. [uselessAssignmentArg]
changed_flags &= SUPPORTED_FILTERS;
^
drivers/net/wireless/ath/ath11k/mac.c:7036:33: warning: Parameter 'channel' can be declared with const [constParameter]
struct ieee80211_channel *channel)
^
drivers/net/wireless/ath/ath11k/mac.c:2466:7: warning: Uninitialized variable: ret [uninitvar]
if (!ret)
^
drivers/net/wireless/ath/ath11k/mac.c:720:34: warning: Uninitialized variables: peer.list, peer.sta, peer.vdev_id, peer.peer_id, peer.ast_hash, peer.pdev_idx, peer.hw_peer_id, peer.tfm_mmic, peer.mcast_keyidx, peer.ucast_keyidx, peer.sec_type, peer.sec_type_grp [uninitvar]
ath11k_peer_rx_tid_cleanup(ar, peer);
^
>> drivers/net/wireless/ath/ath11k/mac.c:6841:13: warning: Uninitialized variable: peer->sta [uninitvar]
if (peer->sta) {
^
drivers/net/wireless/ath/ath11k/mac.c:6832:22: note: Assuming condition is false
if (!vht_fixed_rate && !he_fixed_rate)
^
drivers/net/wireless/ath/ath11k/mac.c:6841:13: note: Uninitialized variable: peer->sta
if (peer->sta) {
^
vim +/i +1845 drivers/net/wireless/ath/ath11k/mac.c
61fe43e7216df6 Miles Hu 2021-09-24 1761
d5c65159f28953 Kalle Valo 2019-11-23 1762 static void ath11k_peer_assoc_h_he(struct ath11k *ar,
d5c65159f28953 Kalle Valo 2019-11-23 1763 struct ieee80211_vif *vif,
d5c65159f28953 Kalle Valo 2019-11-23 1764 struct ieee80211_sta *sta,
d5c65159f28953 Kalle Valo 2019-11-23 1765 struct peer_assoc_params *arg)
d5c65159f28953 Kalle Valo 2019-11-23 1766 {
61fe43e7216df6 Miles Hu 2021-09-24 1767 struct ath11k_vif *arvif = (void *)vif->drv_priv;
61fe43e7216df6 Miles Hu 2021-09-24 1768 struct cfg80211_chan_def def;
9f056ed8ee01ad John Crispin 2019-11-25 1769 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
af6d39db1b046a Tamizh Chelvam 2020-09-08 1770 u8 ampdu_factor;
61fe43e7216df6 Miles Hu 2021-09-24 1771 enum nl80211_band band;
61fe43e7216df6 Miles Hu 2021-09-24 1772 u16 *he_mcs_mask;
61fe43e7216df6 Miles Hu 2021-09-24 1773 u8 max_nss, he_mcs;
61fe43e7216df6 Miles Hu 2021-09-24 1774 u16 he_tx_mcs = 0, v = 0;
61fe43e7216df6 Miles Hu 2021-09-24 1775 int i, he_nss, nss_idx;
61fe43e7216df6 Miles Hu 2021-09-24 1776 bool user_rate_valid = true;
61fe43e7216df6 Miles Hu 2021-09-24 1777
61fe43e7216df6 Miles Hu 2021-09-24 1778 if (WARN_ON(ath11k_mac_vif_chan(vif, &def)))
61fe43e7216df6 Miles Hu 2021-09-24 1779 return;
9f056ed8ee01ad John Crispin 2019-11-25 1780
9f056ed8ee01ad John Crispin 2019-11-25 1781 if (!he_cap->has_he)
9f056ed8ee01ad John Crispin 2019-11-25 1782 return;
9f056ed8ee01ad John Crispin 2019-11-25 1783
61fe43e7216df6 Miles Hu 2021-09-24 1784 band = def.chan->band;
61fe43e7216df6 Miles Hu 2021-09-24 1785 he_mcs_mask = arvif->bitrate_mask.control[band].he_mcs;
61fe43e7216df6 Miles Hu 2021-09-24 1786
61fe43e7216df6 Miles Hu 2021-09-24 1787 if (ath11k_peer_assoc_h_he_masked(he_mcs_mask))
61fe43e7216df6 Miles Hu 2021-09-24 1788 return;
61fe43e7216df6 Miles Hu 2021-09-24 1789
9f056ed8ee01ad John Crispin 2019-11-25 1790 arg->he_flag = true;
9f056ed8ee01ad John Crispin 2019-11-25 1791
c8bcd82a4efd05 Kees Cook 2021-06-16 1792 memcpy_and_pad(&arg->peer_he_cap_macinfo,
c8bcd82a4efd05 Kees Cook 2021-06-16 1793 sizeof(arg->peer_he_cap_macinfo),
c8bcd82a4efd05 Kees Cook 2021-06-16 1794 he_cap->he_cap_elem.mac_cap_info,
c8bcd82a4efd05 Kees Cook 2021-06-16 1795 sizeof(he_cap->he_cap_elem.mac_cap_info),
c8bcd82a4efd05 Kees Cook 2021-06-16 1796 0);
c8bcd82a4efd05 Kees Cook 2021-06-16 1797 memcpy_and_pad(&arg->peer_he_cap_phyinfo,
c8bcd82a4efd05 Kees Cook 2021-06-16 1798 sizeof(arg->peer_he_cap_phyinfo),
c8bcd82a4efd05 Kees Cook 2021-06-16 1799 he_cap->he_cap_elem.phy_cap_info,
c8bcd82a4efd05 Kees Cook 2021-06-16 1800 sizeof(he_cap->he_cap_elem.phy_cap_info),
c8bcd82a4efd05 Kees Cook 2021-06-16 1801 0);
60689de46c7f6a Rajkumar Manoharan 2020-04-24 1802 arg->peer_he_ops = vif->bss_conf.he_oper.params;
9f056ed8ee01ad John Crispin 2019-11-25 1803
9f056ed8ee01ad John Crispin 2019-11-25 1804 /* the top most byte is used to indicate BSS color info */
9f056ed8ee01ad John Crispin 2019-11-25 1805 arg->peer_he_ops &= 0xffffff;
9f056ed8ee01ad John Crispin 2019-11-25 1806
af6d39db1b046a Tamizh Chelvam 2020-09-08 1807 /* As per section 26.6.1 11ax Draft5.0, if the Max AMPDU Exponent Extension
af6d39db1b046a Tamizh Chelvam 2020-09-08 1808 * in HE cap is zero, use the arg->peer_max_mpdu as calculated while parsing
af6d39db1b046a Tamizh Chelvam 2020-09-08 1809 * VHT caps(if VHT caps is present) or HT caps (if VHT caps is not present).
af6d39db1b046a Tamizh Chelvam 2020-09-08 1810 *
af6d39db1b046a Tamizh Chelvam 2020-09-08 1811 * For non-zero value of Max AMPDU Extponent Extension in HE MAC caps,
af6d39db1b046a Tamizh Chelvam 2020-09-08 1812 * if a HE STA sends VHT cap and HE cap IE in assoc request then, use
af6d39db1b046a Tamizh Chelvam 2020-09-08 1813 * MAX_AMPDU_LEN_FACTOR as 20 to calculate max_ampdu length.
af6d39db1b046a Tamizh Chelvam 2020-09-08 1814 * If a HE STA that does not send VHT cap, but HE and HT cap in assoc
af6d39db1b046a Tamizh Chelvam 2020-09-08 1815 * request, then use MAX_AMPDU_LEN_FACTOR as 16 to calculate max_ampdu
af6d39db1b046a Tamizh Chelvam 2020-09-08 1816 * length.
af6d39db1b046a Tamizh Chelvam 2020-09-08 1817 */
1f851b8dfd76a0 Johannes Berg 2021-04-09 1818 ampdu_factor = u8_get_bits(he_cap->he_cap_elem.mac_cap_info[3],
1f851b8dfd76a0 Johannes Berg 2021-04-09 1819 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
af6d39db1b046a Tamizh Chelvam 2020-09-08 1820
af6d39db1b046a Tamizh Chelvam 2020-09-08 1821 if (ampdu_factor) {
af6d39db1b046a Tamizh Chelvam 2020-09-08 1822 if (sta->vht_cap.vht_supported)
af6d39db1b046a Tamizh Chelvam 2020-09-08 1823 arg->peer_max_mpdu = (1 << (IEEE80211_HE_VHT_MAX_AMPDU_FACTOR +
af6d39db1b046a Tamizh Chelvam 2020-09-08 1824 ampdu_factor)) - 1;
af6d39db1b046a Tamizh Chelvam 2020-09-08 1825 else if (sta->ht_cap.ht_supported)
af6d39db1b046a Tamizh Chelvam 2020-09-08 1826 arg->peer_max_mpdu = (1 << (IEEE80211_HE_HT_MAX_AMPDU_FACTOR +
af6d39db1b046a Tamizh Chelvam 2020-09-08 1827 ampdu_factor)) - 1;
af6d39db1b046a Tamizh Chelvam 2020-09-08 1828 }
af6d39db1b046a Tamizh Chelvam 2020-09-08 1829
9f056ed8ee01ad John Crispin 2019-11-25 1830 if (he_cap->he_cap_elem.phy_cap_info[6] &
9f056ed8ee01ad John Crispin 2019-11-25 1831 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) {
9f056ed8ee01ad John Crispin 2019-11-25 1832 int bit = 7;
9f056ed8ee01ad John Crispin 2019-11-25 1833 int nss, ru;
9f056ed8ee01ad John Crispin 2019-11-25 1834
9f056ed8ee01ad John Crispin 2019-11-25 1835 arg->peer_ppet.numss_m1 = he_cap->ppe_thres[0] &
9f056ed8ee01ad John Crispin 2019-11-25 1836 IEEE80211_PPE_THRES_NSS_MASK;
9f056ed8ee01ad John Crispin 2019-11-25 1837 arg->peer_ppet.ru_bit_mask =
9f056ed8ee01ad John Crispin 2019-11-25 1838 (he_cap->ppe_thres[0] &
9f056ed8ee01ad John Crispin 2019-11-25 1839 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK) >>
9f056ed8ee01ad John Crispin 2019-11-25 1840 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_POS;
9f056ed8ee01ad John Crispin 2019-11-25 1841
9f056ed8ee01ad John Crispin 2019-11-25 1842 for (nss = 0; nss <= arg->peer_ppet.numss_m1; nss++) {
9f056ed8ee01ad John Crispin 2019-11-25 1843 for (ru = 0; ru < 4; ru++) {
9f056ed8ee01ad John Crispin 2019-11-25 1844 u32 val = 0;
9f056ed8ee01ad John Crispin 2019-11-25 @1845 int i;
9f056ed8ee01ad John Crispin 2019-11-25 1846
9f056ed8ee01ad John Crispin 2019-11-25 1847 if ((arg->peer_ppet.ru_bit_mask & BIT(ru)) == 0)
9f056ed8ee01ad John Crispin 2019-11-25 1848 continue;
9f056ed8ee01ad John Crispin 2019-11-25 1849 for (i = 0; i < 6; i++) {
9f056ed8ee01ad John Crispin 2019-11-25 1850 val >>= 1;
9f056ed8ee01ad John Crispin 2019-11-25 1851 val |= ((he_cap->ppe_thres[bit / 8] >>
9f056ed8ee01ad John Crispin 2019-11-25 1852 (bit % 8)) & 0x1) << 5;
9f056ed8ee01ad John Crispin 2019-11-25 1853 bit++;
9f056ed8ee01ad John Crispin 2019-11-25 1854 }
9f056ed8ee01ad John Crispin 2019-11-25 1855 arg->peer_ppet.ppet16_ppet8_ru3_ru0[nss] |=
9f056ed8ee01ad John Crispin 2019-11-25 1856 val << (ru * 6);
9f056ed8ee01ad John Crispin 2019-11-25 1857 }
9f056ed8ee01ad John Crispin 2019-11-25 1858 }
9f056ed8ee01ad John Crispin 2019-11-25 1859 }
9f056ed8ee01ad John Crispin 2019-11-25 1860
6d293d447670da John Crispin 2019-11-25 1861 if (he_cap->he_cap_elem.mac_cap_info[0] & IEEE80211_HE_MAC_CAP0_TWT_RES)
6d293d447670da John Crispin 2019-11-25 1862 arg->twt_responder = true;
6d293d447670da John Crispin 2019-11-25 1863 if (he_cap->he_cap_elem.mac_cap_info[0] & IEEE80211_HE_MAC_CAP0_TWT_REQ)
6d293d447670da John Crispin 2019-11-25 1864 arg->twt_requester = true;
6d293d447670da John Crispin 2019-11-25 1865
61fe43e7216df6 Miles Hu 2021-09-24 1866 he_nss = ath11k_mac_max_he_nss(he_mcs_mask);
61fe43e7216df6 Miles Hu 2021-09-24 1867
61fe43e7216df6 Miles Hu 2021-09-24 1868 if (he_nss > sta->rx_nss) {
61fe43e7216df6 Miles Hu 2021-09-24 1869 user_rate_valid = false;
61fe43e7216df6 Miles Hu 2021-09-24 1870 for (nss_idx = sta->rx_nss - 1; nss_idx >= 0; nss_idx--) {
61fe43e7216df6 Miles Hu 2021-09-24 1871 if (he_mcs_mask[nss_idx]) {
61fe43e7216df6 Miles Hu 2021-09-24 1872 user_rate_valid = true;
61fe43e7216df6 Miles Hu 2021-09-24 1873 break;
61fe43e7216df6 Miles Hu 2021-09-24 1874 }
61fe43e7216df6 Miles Hu 2021-09-24 1875 }
61fe43e7216df6 Miles Hu 2021-09-24 1876 }
61fe43e7216df6 Miles Hu 2021-09-24 1877
61fe43e7216df6 Miles Hu 2021-09-24 1878 if (!user_rate_valid) {
61fe43e7216df6 Miles Hu 2021-09-24 1879 ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac setting he range mcs value to peer supported nss %d for peer %pM\n",
61fe43e7216df6 Miles Hu 2021-09-24 1880 sta->rx_nss, sta->addr);
61fe43e7216df6 Miles Hu 2021-09-24 1881 he_mcs_mask[sta->rx_nss - 1] = he_mcs_mask[he_nss - 1];
61fe43e7216df6 Miles Hu 2021-09-24 1882 }
61fe43e7216df6 Miles Hu 2021-09-24 1883
9f056ed8ee01ad John Crispin 2019-11-25 1884 switch (sta->bandwidth) {
9f056ed8ee01ad John Crispin 2019-11-25 1885 case IEEE80211_STA_RX_BW_160:
9f056ed8ee01ad John Crispin 2019-11-25 1886 if (he_cap->he_cap_elem.phy_cap_info[0] &
9f056ed8ee01ad John Crispin 2019-11-25 1887 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) {
9f056ed8ee01ad John Crispin 2019-11-25 1888 v = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80p80);
61fe43e7216df6 Miles Hu 2021-09-24 1889 v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
9f056ed8ee01ad John Crispin 2019-11-25 1890 arg->peer_he_rx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_80_80] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1891
9f056ed8ee01ad John Crispin 2019-11-25 1892 v = le16_to_cpu(he_cap->he_mcs_nss_supp.tx_mcs_80p80);
9f056ed8ee01ad John Crispin 2019-11-25 1893 arg->peer_he_tx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_80_80] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1894
9f056ed8ee01ad John Crispin 2019-11-25 1895 arg->peer_he_mcs_count++;
61fe43e7216df6 Miles Hu 2021-09-24 1896 he_tx_mcs = v;
9f056ed8ee01ad John Crispin 2019-11-25 1897 }
9f056ed8ee01ad John Crispin 2019-11-25 1898 v = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
9f056ed8ee01ad John Crispin 2019-11-25 1899 arg->peer_he_rx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_160] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1900
9f056ed8ee01ad John Crispin 2019-11-25 1901 v = le16_to_cpu(he_cap->he_mcs_nss_supp.tx_mcs_160);
61fe43e7216df6 Miles Hu 2021-09-24 1902 v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
9f056ed8ee01ad John Crispin 2019-11-25 1903 arg->peer_he_tx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_160] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1904
9f056ed8ee01ad John Crispin 2019-11-25 1905 arg->peer_he_mcs_count++;
61fe43e7216df6 Miles Hu 2021-09-24 1906 if (!he_tx_mcs)
61fe43e7216df6 Miles Hu 2021-09-24 1907 he_tx_mcs = v;
0b294aebb6a00b Gustavo A. R. Silva 2020-07-27 1908 fallthrough;
9f056ed8ee01ad John Crispin 2019-11-25 1909
9f056ed8ee01ad John Crispin 2019-11-25 1910 default:
9f056ed8ee01ad John Crispin 2019-11-25 1911 v = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
9f056ed8ee01ad John Crispin 2019-11-25 1912 arg->peer_he_rx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_80] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1913
9f056ed8ee01ad John Crispin 2019-11-25 1914 v = le16_to_cpu(he_cap->he_mcs_nss_supp.tx_mcs_80);
61fe43e7216df6 Miles Hu 2021-09-24 1915 v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
9f056ed8ee01ad John Crispin 2019-11-25 1916 arg->peer_he_tx_mcs_set[WMI_HECAP_TXRX_MCS_NSS_IDX_80] = v;
9f056ed8ee01ad John Crispin 2019-11-25 1917
9f056ed8ee01ad John Crispin 2019-11-25 1918 arg->peer_he_mcs_count++;
61fe43e7216df6 Miles Hu 2021-09-24 1919 if (!he_tx_mcs)
61fe43e7216df6 Miles Hu 2021-09-24 1920 he_tx_mcs = v;
9f056ed8ee01ad John Crispin 2019-11-25 1921 break;
9f056ed8ee01ad John Crispin 2019-11-25 1922 }
61fe43e7216df6 Miles Hu 2021-09-24 1923
61fe43e7216df6 Miles Hu 2021-09-24 1924 /* Calculate peer NSS capability from HE capabilities if STA
61fe43e7216df6 Miles Hu 2021-09-24 1925 * supports HE.
61fe43e7216df6 Miles Hu 2021-09-24 1926 */
61fe43e7216df6 Miles Hu 2021-09-24 1927 for (i = 0, max_nss = 0, he_mcs = 0; i < NL80211_HE_NSS_MAX; i++) {
61fe43e7216df6 Miles Hu 2021-09-24 1928 he_mcs = he_tx_mcs >> (2 * i) & 3;
61fe43e7216df6 Miles Hu 2021-09-24 1929
61fe43e7216df6 Miles Hu 2021-09-24 1930 /* In case of fixed rates, MCS Range in he_tx_mcs might have
61fe43e7216df6 Miles Hu 2021-09-24 1931 * unsupported range, with he_mcs_mask set, so check either of them
61fe43e7216df6 Miles Hu 2021-09-24 1932 * to find nss.
61fe43e7216df6 Miles Hu 2021-09-24 1933 */
61fe43e7216df6 Miles Hu 2021-09-24 1934 if (he_mcs != IEEE80211_HE_MCS_NOT_SUPPORTED ||
61fe43e7216df6 Miles Hu 2021-09-24 1935 he_mcs_mask[i])
61fe43e7216df6 Miles Hu 2021-09-24 1936 max_nss = i + 1;
61fe43e7216df6 Miles Hu 2021-09-24 1937 }
61fe43e7216df6 Miles Hu 2021-09-24 1938 arg->peer_nss = min(sta->rx_nss, max_nss);
61fe43e7216df6 Miles Hu 2021-09-24 1939
61fe43e7216df6 Miles Hu 2021-09-24 1940 ath11k_dbg(ar->ab, ATH11K_DBG_MAC,
61fe43e7216df6 Miles Hu 2021-09-24 1941 "mac he peer %pM nss %d mcs cnt %d\n",
61fe43e7216df6 Miles Hu 2021-09-24 1942 sta->addr, arg->peer_nss, arg->peer_he_mcs_count);
d5c65159f28953 Kalle Valo 2019-11-23 1943 }
d5c65159f28953 Kalle Valo 2019-11-23 1944
:::::: The code at line 1845 was first introduced by commit
:::::: 9f056ed8ee01ad6898db49707cdc70ce923be3d0 ath11k: add HE support
:::::: TO: John Crispin <john@...ozen.org>
:::::: CC: Kalle Valo <kvalo@...eaurora.org>
--
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