linux-kernel - Re: [PATCH V2] Bluetooth: bt3c

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Message-ID: <201808242019.bxvmtb5I%fengguang.wu@intel.com>
Date:   Fri, 24 Aug 2018 22:21:31 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Ding Xiang <dingxiang@...s.chinamobile.com>
Cc:     kbuild-all@...org, marcel@...tmann.org, johan.hedberg@...il.com,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] Bluetooth: bt3c_cs: Fix obsolete function

Hi Ding,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bluetooth/master]
[also build test WARNING on v4.18 next-20180824]
[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/Ding-Xiang/Bluetooth-bt3c_cs-Fix-obsolete-function/20180824-184743
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git master
config: i386-randconfig-a0-201833 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/bluetooth/bt3c_cs.c: In function 'bt3c_load_firmware':
>> drivers/bluetooth/bt3c_cs.c:510:25: warning: passing argument 3 of 'kstrtoul' from incompatible pointer type
        if (kstrtoul(b, 16, &tmp))
                            ^
   In file included from include/linux/list.h:9:0,
                    from include/linux/module.h:9,
                    from drivers/bluetooth/bt3c_cs.c:24:
   include/linux/kernel.h:333:32: note: expected 'long unsigned int *' but argument is of type 'unsigned int *'
    static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
                                   ^

vim +/kstrtoul +510 drivers/bluetooth/bt3c_cs.c

   443	
   444	
   445	static int bt3c_load_firmware(struct bt3c_info *info,
   446				      const unsigned char *firmware,
   447				      int count)
   448	{
   449		char *ptr = (char *) firmware;
   450		char b[9];
   451		unsigned int iobase, tmp;
   452		unsigned long size, addr, fcs, tn;
   453		int i, err = 0;
   454	
   455		iobase = info->p_dev->resource[0]->start;
   456	
   457		/* Reset */
   458		bt3c_io_write(iobase, 0x8040, 0x0404);
   459		bt3c_io_write(iobase, 0x8040, 0x0400);
   460	
   461		udelay(1);
   462	
   463		bt3c_io_write(iobase, 0x8040, 0x0404);
   464	
   465		udelay(17);
   466	
   467		/* Load */
   468		while (count) {
   469			if (ptr[0] != 'S') {
   470				BT_ERR("Bad address in firmware");
   471				err = -EFAULT;
   472				goto error;
   473			}
   474	
   475			memset(b, 0, sizeof(b));
   476			memcpy(b, ptr + 2, 2);
   477			if (kstrtoul(b, 16, &size) < 0)
   478				return -EINVAL;
   479	
   480			memset(b, 0, sizeof(b));
   481			memcpy(b, ptr + 4, 8);
   482			if (kstrtoul(b, 16, &addr) < 0)
   483				return -EINVAL;
   484	
   485			memset(b, 0, sizeof(b));
   486			memcpy(b, ptr + (size * 2) + 2, 2);
   487			if (kstrtoul(b, 16, &fcs) < 0)
   488				return -EINVAL;
   489	
   490			memset(b, 0, sizeof(b));
   491			for (tmp = 0, i = 0; i < size; i++) {
   492				memcpy(b, ptr + (i * 2) + 2, 2);
   493				if (kstrtoul(b, 16, &tn))
   494					return -EINVAL;
   495				tmp += tn;
   496			}
   497	
   498			if (((tmp + fcs) & 0xff) != 0xff) {
   499				BT_ERR("Checksum error in firmware");
   500				err = -EILSEQ;
   501				goto error;
   502			}
   503	
   504			if (ptr[1] == '3') {
   505				bt3c_address(iobase, addr);
   506	
   507				memset(b, 0, sizeof(b));
   508				for (i = 0; i < (size - 4) / 2; i++) {
   509					memcpy(b, ptr + (i * 4) + 12, 4);
 > 510					if (kstrtoul(b, 16, &tmp))
   511						return -EINVAL;
   512					bt3c_put(iobase, tmp);
   513				}
   514			}
   515	
   516			ptr   += (size * 2) + 6;
   517			count -= (size * 2) + 6;
   518		}
   519	
   520		udelay(17);
   521	
   522		/* Boot */
   523		bt3c_address(iobase, 0x3000);
   524		outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
   525	
   526	error:
   527		udelay(17);
   528	
   529		/* Clear */
   530		bt3c_io_write(iobase, 0x7006, 0x0000);
   531		bt3c_io_write(iobase, 0x7005, 0x0000);
   532		bt3c_io_write(iobase, 0x7001, 0x0000);
   533	
   534		return err;
   535	}
   536	

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