[chrome-os:chromeos-4.14 1/1] net/qrtr/qrtr.c:206:2: warning: ignoring return value of 'skb_put_padto', declared with attribute warn_unused_result

[chrome-os:chromeos-4.14 1/1] net/qrtr/qrtr.c:206:2: warning: ignoring return value of 'skb_put_padto', declared with attribute warn_unused_result

[kernel test robot]

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tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.14
head:   6f1b377a32a35fa189d19ec97f9c4c1ff7b30602
commit: 6f1b377a32a35fa189d19ec97f9c4c1ff7b30602 [1/1] CHROMIUM: Merge 'v4.14.200' into chromeos-4.14
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel
        git fetch --no-tags chrome-os chromeos-4.14
        git checkout 6f1b377a32a35fa189d19ec97f9c4c1ff7b30602
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=alpha 

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

All warnings (new ones prefixed by >>):

   net/qrtr/qrtr.c: In function 'qrtr_node_enqueue':
>> net/qrtr/qrtr.c:206:2: warning: ignoring return value of 'skb_put_padto', declared with attribute warn_unused_result [-Wunused-result]
     skb_put_padto(skb, ALIGN(len, 4));
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/skb_put_padto +206 net/qrtr/qrtr.c

bdabad3e363d82 Courtney Cavin         2016-05-06  180  
bdabad3e363d82 Courtney Cavin         2016-05-06  181  /* Pass an outgoing packet socket buffer to the endpoint driver. */
29c3f35e9baa2f Bjorn Andersson        2017-10-10  182  static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb,
29c3f35e9baa2f Bjorn Andersson        2017-10-10  183  			     int type, struct sockaddr_qrtr *from,
29c3f35e9baa2f Bjorn Andersson        2017-10-10  184  			     struct sockaddr_qrtr *to)
bdabad3e363d82 Courtney Cavin         2016-05-06  185  {
72c0326039d201 Bjorn Andersson        2017-10-10  186  	struct qrtr_hdr_v1 *hdr;
29c3f35e9baa2f Bjorn Andersson        2017-10-10  187  	size_t len = skb->len;
bdabad3e363d82 Courtney Cavin         2016-05-06  188  	int rc = -ENODEV;
bdabad3e363d82 Courtney Cavin         2016-05-06  189  
72c0326039d201 Bjorn Andersson        2017-10-10  190  	hdr = skb_push(skb, sizeof(*hdr));
72c0326039d201 Bjorn Andersson        2017-10-10  191  	hdr->version = cpu_to_le32(QRTR_PROTO_VER_1);
29c3f35e9baa2f Bjorn Andersson        2017-10-10  192  	hdr->type = cpu_to_le32(type);
29c3f35e9baa2f Bjorn Andersson        2017-10-10  193  	hdr->src_node_id = cpu_to_le32(from->sq_node);
29c3f35e9baa2f Bjorn Andersson        2017-10-10  194  	hdr->src_port_id = cpu_to_le32(from->sq_port);
9ab672dce5eec6 Arun Kumar Neelakantam 2018-07-04  195  	if (to->sq_port == QRTR_PORT_CTRL) {
9ab672dce5eec6 Arun Kumar Neelakantam 2018-07-04  196  		hdr->dst_node_id = cpu_to_le32(node->nid);
9ab672dce5eec6 Arun Kumar Neelakantam 2018-07-04  197  		hdr->dst_port_id = cpu_to_le32(QRTR_NODE_BCAST);
9ab672dce5eec6 Arun Kumar Neelakantam 2018-07-04  198  	} else {
29c3f35e9baa2f Bjorn Andersson        2017-10-10  199  		hdr->dst_node_id = cpu_to_le32(to->sq_node);
29c3f35e9baa2f Bjorn Andersson        2017-10-10  200  		hdr->dst_port_id = cpu_to_le32(to->sq_port);
9ab672dce5eec6 Arun Kumar Neelakantam 2018-07-04  201  	}
29c3f35e9baa2f Bjorn Andersson        2017-10-10  202  
29c3f35e9baa2f Bjorn Andersson        2017-10-10  203  	hdr->size = cpu_to_le32(len);
29c3f35e9baa2f Bjorn Andersson        2017-10-10  204  	hdr->confirm_rx = 0;
29c3f35e9baa2f Bjorn Andersson        2017-10-10  205  
29c3f35e9baa2f Bjorn Andersson        2017-10-10 @206  	skb_put_padto(skb, ALIGN(len, 4));
29c3f35e9baa2f Bjorn Andersson        2017-10-10  207  
bdabad3e363d82 Courtney Cavin         2016-05-06  208  	mutex_lock(&node->ep_lock);
bdabad3e363d82 Courtney Cavin         2016-05-06  209  	if (node->ep)
bdabad3e363d82 Courtney Cavin         2016-05-06  210  		rc = node->ep->xmit(node->ep, skb);
bdabad3e363d82 Courtney Cavin         2016-05-06  211  	else
bdabad3e363d82 Courtney Cavin         2016-05-06  212  		kfree_skb(skb);
bdabad3e363d82 Courtney Cavin         2016-05-06  213  	mutex_unlock(&node->ep_lock);
bdabad3e363d82 Courtney Cavin         2016-05-06  214  
bdabad3e363d82 Courtney Cavin         2016-05-06  215  	return rc;
bdabad3e363d82 Courtney Cavin         2016-05-06  216  }
bdabad3e363d82 Courtney Cavin         2016-05-06  217  

:::::: The code at line 206 was first introduced by commit
:::::: 29c3f35e9baa2fc39551c6170e140593d85163a3 UPSTREAM: net: qrtr: Pass source and destination to enqueue functions

:::::: TO: Bjorn Andersson <bjorn.andersson@linaro.org>
:::::: CC: chrome-bot <chrome-bot@chromium.org>

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

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