drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16

drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e0756cfc7d7cd08c98a53b6009c091a3f6a50be6
commit: bbd7ffdbef6888459f301c5889f3b14ada38b913 clk: Allow the common clk framework to be selectable
date:   9 months ago
config: arm-randconfig-s032-20210209 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbd7ffdbef6888459f301c5889f3b14ada38b913
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout bbd7ffdbef6888459f301c5889f3b14ada38b913
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16
>> drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16
>> drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16
>> drivers/hsi/clients/ssi_protocol.c:630:33: sparse: sparse: cast to restricted __be16
   drivers/hsi/clients/ssi_protocol.c:631:9: sparse: sparse: cast to restricted __be16
   drivers/hsi/clients/ssi_protocol.c:631:9: sparse: sparse: cast to restricted __be16
   drivers/hsi/clients/ssi_protocol.c:631:9: sparse: sparse: cast to restricted __be16
   drivers/hsi/clients/ssi_protocol.c:631:9: sparse: sparse: cast to restricted __be16
>> drivers/hsi/clients/ssi_protocol.c:992:31: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned short [usertype] @@     got restricted __be16 [usertype] @@
   drivers/hsi/clients/ssi_protocol.c:992:31: sparse:     expected unsigned short [usertype]
   drivers/hsi/clients/ssi_protocol.c:992:31: sparse:     got restricted __be16 [usertype]

vim +630 drivers/hsi/clients/ssi_protocol.c

dc7bf5d7186849 Sebastian Reichel 2013-11-15  607  
dc7bf5d7186849 Sebastian Reichel 2013-11-15  608  /* In soft IRQ context */
dc7bf5d7186849 Sebastian Reichel 2013-11-15  609  static void ssip_pn_rx(struct sk_buff *skb)
dc7bf5d7186849 Sebastian Reichel 2013-11-15  610  {
dc7bf5d7186849 Sebastian Reichel 2013-11-15  611  	struct net_device *dev = skb->dev;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  612  
dc7bf5d7186849 Sebastian Reichel 2013-11-15  613  	if (unlikely(!netif_running(dev))) {
dc7bf5d7186849 Sebastian Reichel 2013-11-15  614  		dev_dbg(&dev->dev, "Drop RX packet\n");
dc7bf5d7186849 Sebastian Reichel 2013-11-15  615  		dev->stats.rx_dropped++;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  616  		dev_kfree_skb(skb);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  617  		return;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  618  	}
dc7bf5d7186849 Sebastian Reichel 2013-11-15  619  	if (unlikely(!pskb_may_pull(skb, SSIP_MIN_PN_HDR))) {
dc7bf5d7186849 Sebastian Reichel 2013-11-15  620  		dev_dbg(&dev->dev, "Error drop RX packet\n");
dc7bf5d7186849 Sebastian Reichel 2013-11-15  621  		dev->stats.rx_errors++;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  622  		dev->stats.rx_length_errors++;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  623  		dev_kfree_skb(skb);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  624  		return;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  625  	}
dc7bf5d7186849 Sebastian Reichel 2013-11-15  626  	dev->stats.rx_packets++;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  627  	dev->stats.rx_bytes += skb->len;
dc7bf5d7186849 Sebastian Reichel 2013-11-15  628  
dc7bf5d7186849 Sebastian Reichel 2013-11-15  629  	/* length field is exchanged in network byte order */
dc7bf5d7186849 Sebastian Reichel 2013-11-15 @630  	((u16 *)skb->data)[2] = ntohs(((u16 *)skb->data)[2]);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  631  	dev_dbg(&dev->dev, "RX length fixed (%04x -> %u)\n",
dc7bf5d7186849 Sebastian Reichel 2013-11-15  632  			((u16 *)skb->data)[2], ntohs(((u16 *)skb->data)[2]));
dc7bf5d7186849 Sebastian Reichel 2013-11-15  633  
dc7bf5d7186849 Sebastian Reichel 2013-11-15  634  	skb->protocol = htons(ETH_P_PHONET);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  635  	skb_reset_mac_header(skb);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  636  	__skb_pull(skb, 1);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  637  	netif_rx(skb);
dc7bf5d7186849 Sebastian Reichel 2013-11-15  638  }
dc7bf5d7186849 Sebastian Reichel 2013-11-15  639  

:::::: The code at line 630 was first introduced by commit
:::::: dc7bf5d7186849aa36b9f0e42e250a813a7b0bdb HSI: Introduce driver for SSI Protocol

:::::: TO: Sebastian Reichel <sre@kernel.org>
:::::: CC: Sebastian Reichel <sre@kernel.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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