Re: [PATCH v2 net] net: Add error pointer check in bcmsysport.c

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

Hi Dipendra,

kernel test robot noticed the following build errors:

[auto build test ERROR on net/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Dipendra-Khadka/net-Add-error-pointer-check-in-bcmsysport-c/20240923-134407
base:   net/main
patch link:    https://lore.kernel.org/r/20240923053900.1310-1-kdipendra88%40gmail.com
patch subject: [PATCH v2 net] net: Add error pointer check in bcmsysport.c
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20240924/202409240305.PgIkDx1K-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240924/202409240305.PgIkDx1K-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/202409240305.PgIkDx1K-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/ethernet/broadcom/bcmsysport.c: In function 'bcm_sysport_map_queues':
>> drivers/net/ethernet/broadcom/bcmsysport.c:2341:24: error: implicit declaration of function 'PRT_ERR'; did you mean 'PTR_ERR'? [-Werror=implicit-function-declaration]
    2341 |                 return PRT_ERR(dp);
         |                        ^~~~~~~
         |                        PTR_ERR
   cc1: some warnings being treated as errors


vim +2341 drivers/net/ethernet/broadcom/bcmsysport.c

  2330	
  2331	static int bcm_sysport_map_queues(struct net_device *dev,
  2332					  struct net_device *slave_dev)
  2333	{
  2334		struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
  2335		struct bcm_sysport_priv *priv = netdev_priv(dev);
  2336		struct bcm_sysport_tx_ring *ring;
  2337		unsigned int num_tx_queues;
  2338		unsigned int q, qp, port;
  2339	
  2340		if (IS_ERR(dp))
> 2341			return PRT_ERR(dp);
  2342	
  2343		/* We can't be setting up queue inspection for non directly attached
  2344		 * switches
  2345		 */
  2346		if (dp->ds->index)
  2347			return 0;
  2348	
  2349		port = dp->index;
  2350	
  2351		/* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
  2352		 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
  2353		 * per-port (slave_dev) network devices queue, we achieve just that.
  2354		 * This need to happen now before any slave network device is used such
  2355		 * it accurately reflects the number of real TX queues.
  2356		 */
  2357		if (priv->is_lite)
  2358			netif_set_real_num_tx_queues(slave_dev,
  2359						     slave_dev->num_tx_queues / 2);
  2360	
  2361		num_tx_queues = slave_dev->real_num_tx_queues;
  2362	
  2363		if (priv->per_port_num_tx_queues &&
  2364		    priv->per_port_num_tx_queues != num_tx_queues)
  2365			netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
  2366	
  2367		priv->per_port_num_tx_queues = num_tx_queues;
  2368	
  2369		for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
  2370		     q++) {
  2371			ring = &priv->tx_rings[q];
  2372	
  2373			if (ring->inspect)
  2374				continue;
  2375	
  2376			/* Just remember the mapping actual programming done
  2377			 * during bcm_sysport_init_tx_ring
  2378			 */
  2379			ring->switch_queue = qp;
  2380			ring->switch_port = port;
  2381			ring->inspect = true;
  2382			priv->ring_map[qp + port * num_tx_queues] = ring;
  2383			qp++;
  2384		}
  2385	
  2386		return 0;
  2387	}
  2388	

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