linux-kernel - Re: [PATCH v4 2/2] USB: quirks: Apply ALWAYS

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Message-ID: <201511250047.RxdAXBvy%fengguang.wu@intel.com>
Date:	Wed, 25 Nov 2015 00:41:35 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Adrien Vergé <adrienverge@...il.com>
Cc:	kbuild-all@...org,
	Benjamin Tissoires <benjamin.tissoires@...il.com>,
	Oliver Neukum <oneukum@...e.com>,
	Jiri Kosina <jikos@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Logan Gunthorpe <logang@...tatee.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Vincent Palatin <vpalatin@...omium.org>,
	Adrien Vergé <adrienverge@...il.com>,
	Macpaul Lin <macpaul@...il.com>,
	Adel Gadllah <adel.gadllah@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v4 2/2] USB: quirks: Apply ALWAYS_POLL to all ELAN devices

Hi Adrien,

[auto build test WARNING on hid/for-next]
[also build test WARNING on v4.4-rc2 next-20151124]

url:    https://github.com/0day-ci/linux/commits/Adrien-Verg/Fixes-for-ELAN-touchscreens/20151124-230537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid.git for-next
config: avr32-hammerhead_defconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=avr32 

All warnings (new ones prefixed by >>):

   drivers/hid/usbhid/hid-quirks.c: In function 'usbhid_exists_squirk':
>> drivers/hid/usbhid/hid-quirks.c:339: warning: comparison is always false due to limited range of data type

vim +339 drivers/hid/usbhid/hid-quirks.c

   323	 * @idProduct: the 16-bit USB product ID, in native byteorder
   324	 *
   325	 * Description:
   326	 *     Given a USB vendor ID and product ID, return a pointer to
   327	 *     the hid_blacklist entry associated with that device.
   328	 *
   329	 * Returns: pointer if quirk found, or NULL if no quirks found.
   330	 */
   331	static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
   332			const u16 idProduct)
   333	{
   334		const struct hid_blacklist *bl_entry = NULL;
   335		int n = 0;
   336	
   337		for (; hid_blacklist[n].idVendor; n++)
   338			if (hid_blacklist[n].idVendor == idVendor &&
 > 339				(hid_blacklist[n].idProduct == HID_ANY_ID ||
   340					hid_blacklist[n].idProduct == idProduct))
   341				bl_entry = &hid_blacklist[n];
   342	
   343		if (bl_entry != NULL)
   344			dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
   345					bl_entry->quirks, bl_entry->idVendor, 
   346					bl_entry->idProduct);
   347		return bl_entry;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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