linux-kernel - drivers/net/wireless/mediatek/mt76/mt7615/testmode.c:83:7: warning: variable 'index' set but not used

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Date:   Sun, 16 Aug 2020 21:27:26 +0800
From:   kernel test robot <lkp@...el.com>
To:     Felix Fietkau <nbd@....name>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/wireless/mediatek/mt76/mt7615/testmode.c:83:7: warning:
 variable 'index' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b6c093e21d36bede0fd88fd0aeb3b03647260e4
commit: 4f0bce1c8888245e006f8c88f44b7419b47a1b4b mt76: mt7615: implement testmode support
date:   4 weeks ago
config: microblaze-randconfig-r006-20200816 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 4f0bce1c8888245e006f8c88f44b7419b47a1b4b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/net/wireless/mediatek/mt76/mt7615/testmode.c: In function 'mt7615_tm_set_tx_power':
>> drivers/net/wireless/mediatek/mt76/mt7615/testmode.c:83:7: warning: variable 'index' set but not used [-Wunused-but-set-variable]
      83 |   int index;
         |       ^~~~~

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f0bce1c8888245e006f8c88f44b7419b47a1b4b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 4f0bce1c8888245e006f8c88f44b7419b47a1b4b
vim +/index +83 drivers/net/wireless/mediatek/mt76/mt7615/testmode.c

    46	
    47	static int
    48	mt7615_tm_set_tx_power(struct mt7615_phy *phy)
    49	{
    50		struct mt7615_dev *dev = phy->dev;
    51		struct mt76_phy *mphy = phy->mt76;
    52		int i, ret, n_chains = hweight8(mphy->antenna_mask);
    53		struct cfg80211_chan_def *chandef = &mphy->chandef;
    54		int freq = chandef->center_freq1, len, target_chains;
    55		u8 *data, *eep = (u8 *)dev->mt76.eeprom.data;
    56		enum nl80211_band band = chandef->chan->band;
    57		struct sk_buff *skb;
    58		struct {
    59			u8 center_chan;
    60			u8 dbdc_idx;
    61			u8 band;
    62			u8 rsv;
    63		} __packed req_hdr = {
    64			.center_chan = ieee80211_frequency_to_channel(freq),
    65			.band = band,
    66			.dbdc_idx = phy != &dev->phy,
    67		};
    68		u8 *tx_power = NULL;
    69	
    70		if (dev->mt76.test.state != MT76_TM_STATE_OFF)
    71			tx_power = dev->mt76.test.tx_power;
    72	
    73		len = sizeof(req_hdr) + MT7615_EE_MAX - MT_EE_NIC_CONF_0;
    74		skb = mt76_mcu_msg_alloc(&dev->mt76, NULL, sizeof(req_hdr) + len);
    75		if (!skb)
    76			return -ENOMEM;
    77	
    78		skb_put_data(skb, &req_hdr, sizeof(req_hdr));
    79		data = skb_put_data(skb, eep + MT_EE_NIC_CONF_0, len);
    80	
    81		target_chains = mt7615_ext_pa_enabled(dev, band) ? 1 : n_chains;
    82		for (i = 0; i < target_chains; i++) {
  > 83			int index;
    84	
    85			ret = mt7615_eeprom_get_target_power_index(dev, chandef->chan, i);
    86			if (ret < 0)
    87				return -EINVAL;
    88	
    89			index = ret - MT_EE_NIC_CONF_0;
    90			if (tx_power && tx_power[i])
    91				data[ret - MT_EE_NIC_CONF_0] = tx_power[i];
    92		}
    93	
    94		return __mt76_mcu_skb_send_msg(&dev->mt76, skb,
    95					       MCU_EXT_CMD_SET_TX_POWER_CTRL, false);
    96	}
    97	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (33633 bytes)