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Date: Wed, 19 Oct 2022 11:23:38 +0800
From: kernel test robot <lkp@...el.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/sun/sunhme.c:3067:6: warning: Local variable
'addr' shadows outer variable [shadowVariable]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: aae703b02f92bde9264366c545e87cec451de471
commit: a7639279c93c1e07a703c0f86f0831d4ea2314f0 ethernet: sun: remove direct netdev->dev_addr writes
date: 1 year ago
compiler: alpha-linux-gcc (GCC) 12.1.0
reproduce (cppcheck warning):
# apt-get install cppcheck
git checkout a7639279c93c1e07a703c0f86f0831d4ea2314f0
cppcheck --quiet --enable=style,performance,portability --template=gcc FILE
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
cppcheck warnings: (new ones prefixed by >>)
>> drivers/net/ethernet/sun/sunhme.c:3067:6: warning: Local variable 'addr' shadows outer variable [shadowVariable]
u8 addr[ETH_ALEN];
^
drivers/net/ethernet/sun/sunhme.c:2974:5: note: Shadowed declaration
u8 addr[ETH_ALEN];
^
drivers/net/ethernet/sun/sunhme.c:3067:6: note: Shadow variable
u8 addr[ETH_ALEN];
^
>> drivers/net/ethernet/sun/sunhme.c:3159:8: warning: Local variable 'i' shadows outer variable [shadowVariable]
int i = simple_strtoul(dev->name + 3, NULL, 10);
^
drivers/net/ethernet/sun/sunhme.c:2972:6: note: Shadowed declaration
int i, qfe_slot = -1;
^
drivers/net/ethernet/sun/sunhme.c:3159:8: note: Shadow variable
int i = simple_strtoul(dev->name + 3, NULL, 10);
^
drivers/net/ethernet/sun/sunhme.c:2706:24: warning: Local variable 'addr' shadows outer variable [shadowVariable]
const unsigned char *addr;
^
drivers/net/ethernet/sun/sunhme.c:2664:5: note: Shadowed declaration
u8 addr[ETH_ALEN];
^
drivers/net/ethernet/sun/sunhme.c:2706:24: note: Shadow variable
const unsigned char *addr;
^
drivers/net/ethernet/sun/sunhme.c:3055:24: warning: Local variable 'addr' shadows outer variable [shadowVariable]
const unsigned char *addr;
^
drivers/net/ethernet/sun/sunhme.c:2974:5: note: Shadowed declaration
u8 addr[ETH_ALEN];
^
drivers/net/ethernet/sun/sunhme.c:3055:24: note: Shadow variable
const unsigned char *addr;
^
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/tty/serial/msm_serial.c:1087:29: warning: Expression is always true because 'else if' condition is opposite to previous condition at line 1074. [multiCondition]
} else if (entry->divisor > divisor) {
^
drivers/tty/serial/msm_serial.c:1074:22: note: first condition
if (entry->divisor <= divisor) {
^
drivers/tty/serial/msm_serial.c:1087:29: note: else if condition is opposite to first condition
} else if (entry->divisor > divisor) {
^
vim +/addr +3067 drivers/net/ethernet/sun/sunhme.c
2987
2988 err = -ENODEV;
2989
2990 if (pci_enable_device(pdev))
2991 goto err_out;
2992 pci_set_master(pdev);
2993
2994 if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
2995 qp = quattro_pci_find(pdev);
2996 if (qp == NULL)
2997 goto err_out;
2998 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2999 if (qp->happy_meals[qfe_slot] == NULL)
3000 break;
3001 if (qfe_slot == 4)
3002 goto err_out;
3003 }
3004
3005 dev = alloc_etherdev(sizeof(struct happy_meal));
3006 err = -ENOMEM;
3007 if (!dev)
3008 goto err_out;
3009 SET_NETDEV_DEV(dev, &pdev->dev);
3010
3011 if (hme_version_printed++ == 0)
3012 printk(KERN_INFO "%s", version);
3013
3014 hp = netdev_priv(dev);
3015
3016 hp->happy_dev = pdev;
3017 hp->dma_dev = &pdev->dev;
3018
3019 spin_lock_init(&hp->happy_lock);
3020
3021 if (qp != NULL) {
3022 hp->qfe_parent = qp;
3023 hp->qfe_ent = qfe_slot;
3024 qp->happy_meals[qfe_slot] = dev;
3025 }
3026
3027 hpreg_res = pci_resource_start(pdev, 0);
3028 err = -ENODEV;
3029 if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
3030 printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
3031 goto err_out_clear_quattro;
3032 }
3033 if (pci_request_regions(pdev, DRV_NAME)) {
3034 printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
3035 "aborting.\n");
3036 goto err_out_clear_quattro;
3037 }
3038
3039 if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
3040 printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
3041 goto err_out_free_res;
3042 }
3043
3044 for (i = 0; i < 6; i++) {
3045 if (macaddr[i] != 0)
3046 break;
3047 }
3048 if (i < 6) { /* a mac address was given */
3049 for (i = 0; i < 6; i++)
3050 addr[i] = macaddr[i];
3051 eth_hw_addr_set(dev, addr);
3052 macaddr[5]++;
3053 } else {
3054 #ifdef CONFIG_SPARC
3055 const unsigned char *addr;
3056 int len;
3057
3058 if (qfe_slot != -1 &&
3059 (addr = of_get_property(dp, "local-mac-address", &len))
3060 != NULL &&
3061 len == 6) {
3062 eth_hw_addr_set(dev, addr);
3063 } else {
3064 eth_hw_addr_set(dev, idprom->id_ethaddr);
3065 }
3066 #else
> 3067 u8 addr[ETH_ALEN];
3068
3069 get_hme_mac_nonsparc(pdev, addr);
3070 eth_hw_addr_set(dev, addr);
3071 #endif
3072 }
3073
3074 /* Layout registers. */
3075 hp->gregs = (hpreg_base + 0x0000UL);
3076 hp->etxregs = (hpreg_base + 0x2000UL);
3077 hp->erxregs = (hpreg_base + 0x4000UL);
3078 hp->bigmacregs = (hpreg_base + 0x6000UL);
3079 hp->tcvregs = (hpreg_base + 0x7000UL);
3080
3081 #ifdef CONFIG_SPARC
3082 hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
3083 if (hp->hm_revision == 0xff)
3084 hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
3085 #else
3086 /* works with this on non-sparc hosts */
3087 hp->hm_revision = 0x20;
3088 #endif
3089
3090 /* Now enable the feature flags we can. */
3091 if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
3092 hp->happy_flags = HFLAG_20_21;
3093 else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
3094 hp->happy_flags = HFLAG_NOT_A0;
3095
3096 if (qp != NULL)
3097 hp->happy_flags |= HFLAG_QUATTRO;
3098
3099 /* And of course, indicate this is PCI. */
3100 hp->happy_flags |= HFLAG_PCI;
3101
3102 #ifdef CONFIG_SPARC
3103 /* Assume PCI happy meals can handle all burst sizes. */
3104 hp->happy_bursts = DMA_BURSTBITS;
3105 #endif
3106
3107 hp->happy_block = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
3108 &hp->hblock_dvma, GFP_KERNEL);
3109 err = -ENODEV;
3110 if (!hp->happy_block)
3111 goto err_out_iounmap;
3112
3113 hp->linkcheck = 0;
3114 hp->timer_state = asleep;
3115 hp->timer_ticks = 0;
3116
3117 timer_setup(&hp->happy_timer, happy_meal_timer, 0);
3118
3119 hp->irq = pdev->irq;
3120 hp->dev = dev;
3121 dev->netdev_ops = &hme_netdev_ops;
3122 dev->watchdog_timeo = 5*HZ;
3123 dev->ethtool_ops = &hme_ethtool_ops;
3124
3125 /* Happy Meal can do it all... */
3126 dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
3127 dev->features |= dev->hw_features | NETIF_F_RXCSUM;
3128
3129 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
3130 /* Hook up PCI register/descriptor accessors. */
3131 hp->read_desc32 = pci_hme_read_desc32;
3132 hp->write_txd = pci_hme_write_txd;
3133 hp->write_rxd = pci_hme_write_rxd;
3134 hp->read32 = pci_hme_read32;
3135 hp->write32 = pci_hme_write32;
3136 #endif
3137
3138 /* Grrr, Happy Meal comes up by default not advertising
3139 * full duplex 100baseT capabilities, fix this.
3140 */
3141 spin_lock_irq(&hp->happy_lock);
3142 happy_meal_set_initial_advertisement(hp);
3143 spin_unlock_irq(&hp->happy_lock);
3144
3145 err = register_netdev(hp->dev);
3146 if (err) {
3147 printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
3148 "aborting.\n");
3149 goto err_out_iounmap;
3150 }
3151
3152 pci_set_drvdata(pdev, hp);
3153
3154 if (!qfe_slot) {
3155 struct pci_dev *qpdev = qp->quattro_dev;
3156
3157 prom_name[0] = 0;
3158 if (!strncmp(dev->name, "eth", 3)) {
> 3159 int i = simple_strtoul(dev->name + 3, NULL, 10);
3160 sprintf(prom_name, "-%d", i + 3);
3161 }
3162 printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
3163 if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
3164 qpdev->device == PCI_DEVICE_ID_DEC_21153)
3165 printk("DEC 21153 PCI Bridge\n");
3166 else
3167 printk("unknown bridge %04x.%04x\n",
3168 qpdev->vendor, qpdev->device);
3169 }
3170
3171 if (qfe_slot != -1)
3172 printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
3173 dev->name, qfe_slot);
3174 else
3175 printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
3176 dev->name);
3177
3178 printk("%pM\n", dev->dev_addr);
3179
3180 return 0;
3181
3182 err_out_iounmap:
3183 iounmap(hp->gregs);
3184
3185 err_out_free_res:
3186 pci_release_regions(pdev);
3187
3188 err_out_clear_quattro:
3189 if (qp != NULL)
3190 qp->happy_meals[qfe_slot] = NULL;
3191
3192 free_netdev(dev);
3193
3194 err_out:
3195 return err;
3196 }
3197
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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