linux-kernel - drivers/net/wireless/mediatek/mt76/mt7915/mmio.c:341 __mt7915_reg_addr() warn: always true condition '(addr <= 4294967295) => (0-u32max <= u32max)'

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Message-ID: <202208181013.Jmha89rK-lkp@intel.com>
Date:   Thu, 18 Aug 2022 10:20:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Bo Jiao <Bo.Jiao@...iatek.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Felix Fietkau <nbd@....name>,
        Sujuan Chen <sujuan.chen@...iatek.com>,
        Ryder Lee <ryder.lee@...iatek.com>
Subject: drivers/net/wireless/mediatek/mt76/mt7915/mmio.c:341
 __mt7915_reg_addr() warn: always true condition '(addr <= 4294967295) =>
 (0-u32max <= u32max)'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3b06a2755758937add738545ba4a544fc5a1c56d
commit: cd4c314a65d3cce6486f8303e42aca04fd9f9011 mt76: mt7915: refine register definition
date:   7 months ago
config: ia64-randconfig-m031-20220814 (https://download.01.org/0day-ci/archive/20220818/202208181013.Jmha89rK-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 12.1.0

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

smatch warnings:
drivers/net/wireless/mediatek/mt76/mt7915/mmio.c:341 __mt7915_reg_addr() warn: always true condition '(addr <= 4294967295) => (0-u32max <= u32max)'

vim +341 drivers/net/wireless/mediatek/mt76/mt7915/mmio.c

   311	
   312	static u32 __mt7915_reg_addr(struct mt7915_dev *dev, u32 addr)
   313	{
   314		int i;
   315	
   316		if (addr < 0x100000)
   317			return addr;
   318	
   319		if (!dev->reg.map) {
   320			dev_err(dev->mt76.dev, "err: reg_map is null\n");
   321			return addr;
   322		}
   323	
   324		for (i = 0; i < dev->reg.map_size; i++) {
   325			u32 ofs;
   326	
   327			if (addr < dev->reg.map[i].phys)
   328				continue;
   329	
   330			ofs = addr - dev->reg.map[i].phys;
   331			if (ofs > dev->reg.map[i].size)
   332				continue;
   333	
   334			return dev->reg.map[i].maps + ofs;
   335		}
   336	
   337		if ((addr >= MT_INFRA_BASE && addr < MT_WFSYS0_PHY_START) ||
   338		    (addr >= MT_WFSYS0_PHY_START && addr < MT_WFSYS1_PHY_START) ||
   339		    (addr >= MT_WFSYS1_PHY_START && addr <= MT_WFSYS1_PHY_END) ||
   340		    (addr >= MT_CBTOP1_PHY_START && addr <= MT_CBTOP1_PHY_END) ||
 > 341		    (addr >= MT_CBTOP2_PHY_START && addr <= MT_CBTOP2_PHY_END))
   342			return mt7915_reg_map_l1(dev, addr);
   343	
   344		return mt7915_reg_map_l2(dev, addr);
   345	}
   346	

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https://01.org/lkp