linux-kernel - Re: [PATCH 09/14] greybus: cpc: acknowledge all incoming messages

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Message-ID: <202512140750.0RkH4TN6-lkp@intel.com>
Date: Sun, 14 Dec 2025 07:45:25 +0800
From: kernel test robot <lkp@...el.com>
To: Damien Riégel <damien.riegel@...abs.com>,
	greybus-dev@...ts.linaro.org
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Silicon Labs Kernel Team <linux-devel@...abs.com>,
	Damien Riégel <damien.riegel@...abs.com>
Subject: Re: [PATCH 09/14] greybus: cpc: acknowledge all incoming messages

Hi Damien,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.18 next-20251212]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Damien-Ri-gel/greybus-cpc-add-minimal-CPC-Host-Device-infrastructure/20251213-010308
base:   linus/master
patch link:    https://lore.kernel.org/r/20251212161308.25678-10-damien.riegel%40silabs.com
patch subject: [PATCH 09/14] greybus: cpc: acknowledge all incoming messages
config: arc-randconfig-r122-20251213 (https://download.01.org/0day-ci/archive/20251214/202512140750.0RkH4TN6-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140750.0RkH4TN6-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512140750.0RkH4TN6-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/greybus/cpc/protocol.c:46:22: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le16 [usertype] size @@     got unsigned int @@
   drivers/greybus/cpc/protocol.c:46:22: sparse:     expected restricted __le16 [usertype] size
   drivers/greybus/cpc/protocol.c:46:22: sparse:     got unsigned int

vim +46 drivers/greybus/cpc/protocol.c

    30	
    31	static void cpc_protocol_queue_ack(struct cpc_cport *cport, u8 ack)
    32	{
    33		struct gb_operation_msg_hdr *gb_hdr;
    34		struct sk_buff *skb;
    35	
    36		skb = alloc_skb(CPC_HEADER_SIZE + sizeof(*gb_hdr), GFP_KERNEL);
    37		if (!skb)
    38			return;
    39	
    40		skb_reserve(skb, CPC_HEADER_SIZE);
    41	
    42		gb_hdr = skb_put(skb, sizeof(*gb_hdr));
    43		memset(gb_hdr, 0, sizeof(*gb_hdr));
    44	
    45		/* In the CPC Operation Header, only the size and cport_id matter for ACKs. */
  > 46		gb_hdr->size = sizeof(*gb_hdr);
    47		cpc_cport_pack(gb_hdr, cport->id);
    48	
    49		cpc_protocol_prepare_header(skb, ack);
    50	
    51		cpc_hd_send_skb(cport->cpc_hd, skb);
    52	}
    53	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki