Re: [net-next PATCH v1 10/15] octeontx2-pf: ipsec: Setup NIX HW resources for inbound flows

[kernel test robot <lkp@intel.com>]

Hi Tanmay,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Tanmay-Jagdale/crypto-octeontx2-Share-engine-group-info-with-AF-driver/20250502-213203
base:   net-next/main
patch link:    https://lore.kernel.org/r/20250502132005.611698-11-tanmay%40marvell.com
patch subject: [net-next PATCH v1 10/15] octeontx2-pf: ipsec: Setup NIX HW resources for inbound flows
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250507/202505071739.xTGCCtUx-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250507/202505071739.xTGCCtUx-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505071739.xTGCCtUx-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c:488:6: warning: variable 'pool' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
     488 |         if (err)
         |             ^~~
   drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c:512:23: note: uninitialized use occurs here
     512 |         qmem_free(pfvf->dev, pool->stack);
         |                              ^~~~
   drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c:488:2: note: remove the 'if' if its condition is always false
     488 |         if (err)
         |         ^~~~~~~~
     489 |                 goto pool_fail;
         |                 ~~~~~~~~~~~~~~
   drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c:466:24: note: initialize the variable 'pool' to silence this warning
     466 |         struct otx2_pool *pool;
         |                               ^
         |                                = NULL
   1 warning generated.


vim +488 drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c

   461	
   462	static int cn10k_ipsec_setup_nix_rx_hw_resources(struct otx2_nic *pfvf)
   463	{
   464		struct otx2_hw *hw = &pfvf->hw;
   465		int stack_pages, pool_id;
   466		struct otx2_pool *pool;
   467		int err, ptr, num_ptrs;
   468		dma_addr_t bufptr;
   469	
   470		num_ptrs = 256;
   471		pool_id = pfvf->ipsec.inb_ipsec_pool;
   472		stack_pages = (num_ptrs + hw->stack_pg_ptrs - 1) / hw->stack_pg_ptrs;
   473	
   474		mutex_lock(&pfvf->mbox.lock);
   475	
   476		/* Initialize aura context */
   477		err = cn10k_ipsec_ingress_aura_init(pfvf, pool_id, pool_id, num_ptrs);
   478		if (err)
   479			goto fail;
   480	
   481		/* Initialize pool */
   482		err = otx2_pool_init(pfvf, pool_id, stack_pages, num_ptrs, pfvf->rbsize, AURA_NIX_RQ);
   483		if (err)
   484			goto fail;
   485	
   486		/* Flush accumulated messages */
   487		err = otx2_sync_mbox_msg(&pfvf->mbox);
 > 488		if (err)
   489			goto pool_fail;
   490	
   491		/* Allocate pointers and free them to aura/pool */
   492		pool = &pfvf->qset.pool[pool_id];
   493		for (ptr = 0; ptr < num_ptrs; ptr++) {
   494			err = otx2_alloc_rbuf(pfvf, pool, &bufptr, pool_id, ptr);
   495			if (err) {
   496				err = -ENOMEM;
   497				goto pool_fail;
   498			}
   499			pfvf->hw_ops->aura_freeptr(pfvf, pool_id, bufptr + OTX2_HEAD_ROOM);
   500		}
   501	
   502		/* Initialize RQ and map buffers from pool_id */
   503		err = cn10k_ipsec_ingress_rq_init(pfvf, pfvf->ipsec.inb_ipsec_rq, pool_id);
   504		if (err)
   505			goto pool_fail;
   506	
   507		mutex_unlock(&pfvf->mbox.lock);
   508		return 0;
   509	
   510	pool_fail:
   511		mutex_unlock(&pfvf->mbox.lock);
   512		qmem_free(pfvf->dev, pool->stack);
   513		qmem_free(pfvf->dev, pool->fc_addr);
   514		page_pool_destroy(pool->page_pool);
   515		devm_kfree(pfvf->dev, pool->xdp);
   516		pool->xsk_pool = NULL;
   517	fail:
   518		otx2_mbox_reset(&pfvf->mbox.mbox, 0);
   519		return err;
   520	}
   521	

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