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* drivers/scsi/elx/libefc/efc_device.c:932:6: warning: cast to smaller integer type 'enum efc_nport_topology' from 'void *'
@ 2021-08-12 23:07 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-08-12 23:07 UTC (permalink / raw)
  To: James Smart
  Cc: clang-built-linux, kbuild-all, linux-kernel, Martin K. Petersen,
	Hannes Reinecke, Daniel Wagner, Ram Vegesna

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Hi James,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f8fbb47c6e86c0b75f8df864db702c3e3f757361
commit: ebc076b3eddc807729bd81f7bc48e798a3ddc477 scsi: elx: efct: Tie into kernel Kconfig and build process
date:   8 weeks ago
config: x86_64-randconfig-a004-20210813 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 767496d19cb9a1fbba57ff08095faa161998ee36)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ebc076b3eddc807729bd81f7bc48e798a3ddc477
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ebc076b3eddc807729bd81f7bc48e798a3ddc477
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> drivers/scsi/elx/libefc/efc_device.c:932:6: warning: cast to smaller integer type 'enum efc_nport_topology' from 'void *' [-Wvoid-pointer-to-enum-cast]
                                           (enum efc_nport_topology)arg;
                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +932 drivers/scsi/elx/libefc/efc_device.c

202bfdffae27a5 James Smart 2021-06-01  909  
202bfdffae27a5 James Smart 2021-06-01  910  void
202bfdffae27a5 James Smart 2021-06-01  911  __efc_d_wait_topology_notify(struct efc_sm_ctx *ctx,
202bfdffae27a5 James Smart 2021-06-01  912  			     enum efc_sm_event evt, void *arg)
202bfdffae27a5 James Smart 2021-06-01  913  {
202bfdffae27a5 James Smart 2021-06-01  914  	int rc;
202bfdffae27a5 James Smart 2021-06-01  915  	struct efc_node *node = ctx->app;
202bfdffae27a5 James Smart 2021-06-01  916  
202bfdffae27a5 James Smart 2021-06-01  917  	efc_node_evt_set(ctx, evt, __func__);
202bfdffae27a5 James Smart 2021-06-01  918  
202bfdffae27a5 James Smart 2021-06-01  919  	node_sm_trace();
202bfdffae27a5 James Smart 2021-06-01  920  
202bfdffae27a5 James Smart 2021-06-01  921  	switch (evt) {
202bfdffae27a5 James Smart 2021-06-01  922  	case EFC_EVT_ENTER:
202bfdffae27a5 James Smart 2021-06-01  923  		efc_node_hold_frames(node);
202bfdffae27a5 James Smart 2021-06-01  924  		break;
202bfdffae27a5 James Smart 2021-06-01  925  
202bfdffae27a5 James Smart 2021-06-01  926  	case EFC_EVT_EXIT:
202bfdffae27a5 James Smart 2021-06-01  927  		efc_node_accept_frames(node);
202bfdffae27a5 James Smart 2021-06-01  928  		break;
202bfdffae27a5 James Smart 2021-06-01  929  
202bfdffae27a5 James Smart 2021-06-01  930  	case EFC_EVT_NPORT_TOPOLOGY_NOTIFY: {
202bfdffae27a5 James Smart 2021-06-01  931  		enum efc_nport_topology topology =
202bfdffae27a5 James Smart 2021-06-01 @932  					(enum efc_nport_topology)arg;
202bfdffae27a5 James Smart 2021-06-01  933  
202bfdffae27a5 James Smart 2021-06-01  934  		WARN_ON(node->nport->domain->attached);
202bfdffae27a5 James Smart 2021-06-01  935  
202bfdffae27a5 James Smart 2021-06-01  936  		WARN_ON(node->send_ls_acc != EFC_NODE_SEND_LS_ACC_PLOGI);
202bfdffae27a5 James Smart 2021-06-01  937  
202bfdffae27a5 James Smart 2021-06-01  938  		node_printf(node, "topology notification, topology=%d\n",
202bfdffae27a5 James Smart 2021-06-01  939  			    topology);
202bfdffae27a5 James Smart 2021-06-01  940  
202bfdffae27a5 James Smart 2021-06-01  941  		/* At the time the PLOGI was received, the topology was unknown,
202bfdffae27a5 James Smart 2021-06-01  942  		 * so we didn't know which node would perform the domain attach:
202bfdffae27a5 James Smart 2021-06-01  943  		 * 1. The node from which the PLOGI was sent (p2p) or
202bfdffae27a5 James Smart 2021-06-01  944  		 * 2. The node to which the FLOGI was sent (fabric).
202bfdffae27a5 James Smart 2021-06-01  945  		 */
202bfdffae27a5 James Smart 2021-06-01  946  		if (topology == EFC_NPORT_TOPO_P2P) {
202bfdffae27a5 James Smart 2021-06-01  947  			/* if this is p2p, need to attach to the domain using
202bfdffae27a5 James Smart 2021-06-01  948  			 * the d_id from the PLOGI received
202bfdffae27a5 James Smart 2021-06-01  949  			 */
202bfdffae27a5 James Smart 2021-06-01  950  			efc_domain_attach(node->nport->domain,
202bfdffae27a5 James Smart 2021-06-01  951  					  node->ls_acc_did);
202bfdffae27a5 James Smart 2021-06-01  952  		}
202bfdffae27a5 James Smart 2021-06-01  953  		/* else, if this is fabric, the domain attach
202bfdffae27a5 James Smart 2021-06-01  954  		 * should be performed by the fabric node (node sending FLOGI);
202bfdffae27a5 James Smart 2021-06-01  955  		 * just wait for attach to complete
202bfdffae27a5 James Smart 2021-06-01  956  		 */
202bfdffae27a5 James Smart 2021-06-01  957  
202bfdffae27a5 James Smart 2021-06-01  958  		efc_node_transition(node, __efc_d_wait_domain_attach, NULL);
202bfdffae27a5 James Smart 2021-06-01  959  		break;
202bfdffae27a5 James Smart 2021-06-01  960  	}
202bfdffae27a5 James Smart 2021-06-01  961  	case EFC_EVT_DOMAIN_ATTACH_OK:
202bfdffae27a5 James Smart 2021-06-01  962  		WARN_ON(!node->nport->domain->attached);
202bfdffae27a5 James Smart 2021-06-01  963  		node_printf(node, "domain attach ok\n");
202bfdffae27a5 James Smart 2021-06-01  964  		/* sm: / efc_node_attach */
202bfdffae27a5 James Smart 2021-06-01  965  		rc = efc_node_attach(node);
202bfdffae27a5 James Smart 2021-06-01  966  		efc_node_transition(node, __efc_d_wait_node_attach, NULL);
202bfdffae27a5 James Smart 2021-06-01  967  		if (rc < 0)
202bfdffae27a5 James Smart 2021-06-01  968  			efc_node_post_event(node,
202bfdffae27a5 James Smart 2021-06-01  969  					    EFC_EVT_NODE_ATTACH_FAIL, NULL);
202bfdffae27a5 James Smart 2021-06-01  970  
202bfdffae27a5 James Smart 2021-06-01  971  		break;
202bfdffae27a5 James Smart 2021-06-01  972  
202bfdffae27a5 James Smart 2021-06-01  973  	default:
202bfdffae27a5 James Smart 2021-06-01  974  		__efc_d_common(__func__, ctx, evt, arg);
202bfdffae27a5 James Smart 2021-06-01  975  	}
202bfdffae27a5 James Smart 2021-06-01  976  }
202bfdffae27a5 James Smart 2021-06-01  977  

:::::: The code at line 932 was first introduced by commit
:::::: 202bfdffae27a50d6fae0a259cde1333d9833127 scsi: elx: libefc: FC node ELS and state handling

:::::: TO: James Smart <jsmart2021@gmail.com>
:::::: CC: Martin K. Petersen <martin.petersen@oracle.com>

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

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