netdev - Re: [PATCH 2/2] net/smc: Improve exception handling in smc_llc_cli_add_link

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Date: Mon, 1 Jan 2024 06:09:07 +0800
From: kernel test robot <lkp@...el.com>
To: Markus Elfring <Markus.Elfring@....de>, linux-s390@...r.kernel.org,
	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	"D. Wythe" <alibuda@...ux.alibaba.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Jan Karcher <jaka@...ux.ibm.com>,
	Paolo Abeni <pabeni@...hat.com>, Tony Lu <tonylu@...ux.alibaba.com>,
	Wen Gu <guwen@...ux.alibaba.com>,
	Wenjia Zhang <wenjia@...ux.ibm.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] net/smc: Improve exception handling in
 smc_llc_cli_add_link_invite()

Hi Markus,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net/main]
[also build test WARNING on net-next/main linus/master v6.7-rc7 next-20231222]
[cannot apply to horms-ipvs/master]
[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/Markus-Elfring/net-smc-Return-directly-after-a-failed-kzalloc-in-smc_fill_gid_list/20231231-231406
base:   net/main
patch link:    https://lore.kernel.org/r/5253e660-6b66-4775-ae2f-06f5a1d40be5%40web.de
patch subject: [PATCH 2/2] net/smc: Improve exception handling in smc_llc_cli_add_link_invite()
config: x86_64-randconfig-002-20231231 (https://download.01.org/0day-ci/archive/20240101/202401010536.XhzcWDPH-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240101/202401010536.XhzcWDPH-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/202401010536.XhzcWDPH-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/smc/smc_llc.c:1175:34: warning: '&&' within '||' [-Wlogical-op-parentheses]
    1174 |             lgr->type == SMC_LGR_ASYMMETRIC_PEER ||
         |                                                  ~~
    1175 |             lgr->type == SMC_LGR_SINGLE && lgr->max_links <= 1)
         |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
   net/smc/smc_llc.c:1175:34: note: place parentheses around the '&&' expression to silence this warning
    1175 |             lgr->type == SMC_LGR_SINGLE && lgr->max_links <= 1)
         |                                         ^                     
         |             (                                                 )
   1 warning generated.


vim +1175 net/smc/smc_llc.c

  1160	
  1161	/* as an SMC client, invite server to start the add_link processing */
  1162	static void smc_llc_cli_add_link_invite(struct smc_link *link,
  1163						struct smc_llc_qentry *qentry)
  1164	{
  1165		struct smc_link_group *lgr = smc_get_lgr(link);
  1166		struct smc_init_info *ini;
  1167	
  1168		if (lgr->smc_version == SMC_V2) {
  1169			smc_llc_send_request_add_link(link);
  1170			goto free_qentry;
  1171		}
  1172	
  1173		if (lgr->type == SMC_LGR_SYMMETRIC ||
  1174		    lgr->type == SMC_LGR_ASYMMETRIC_PEER ||
> 1175		    lgr->type == SMC_LGR_SINGLE && lgr->max_links <= 1)
  1176			goto free_qentry;
  1177	
  1178		ini = kzalloc(sizeof(*ini), GFP_KERNEL);
  1179		if (!ini)
  1180			goto free_qentry;
  1181	
  1182		ini->vlan_id = lgr->vlan_id;
  1183		smc_pnet_find_alt_roce(lgr, ini, link->smcibdev);
  1184		if (!ini->ib_dev)
  1185			goto out;
  1186	
  1187		smc_llc_send_add_link(link, ini->ib_dev->mac[ini->ib_port - 1],
  1188				      ini->ib_gid, NULL, SMC_LLC_REQ);
  1189	out:
  1190		kfree(ini);
  1191	free_qentry:
  1192		kfree(qentry);
  1193	}
  1194	

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