[chrome-os:chromeos-6.6 99/99] drivers/mailbox/mailbox.c:382:32: error: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast

[chrome-os:chromeos-6.6 99/99] drivers/mailbox/mailbox.c:382:32: error: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast

[kernel test robot]

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-6.6
head:   f5002a03972c582b24af87ac1e3c5ffecb07573f
commit: 71e4fcb288df366078213ba4fcf976f12a14d5e2 [99/99] FROMLIST: mailbox: Add power_get/power_put API to mbox_chan_ops
config: arm-randconfig-004-20241230 (https://download.01.org/0day-ci/archive/20241230/202412302047.5eMBd6G9-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241230/202412302047.5eMBd6G9-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/202412302047.5eMBd6G9-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/mailbox/mailbox.c: In function '__mbox_bind_client':
>> drivers/mailbox/mailbox.c:382:32: error: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion]
     382 |                         return ERR_PTR(ret);
         |                                ^~~~~~~~~~~~


vim +382 drivers/mailbox/mailbox.c

   355	
   356	static int __mbox_bind_client(struct mbox_chan *chan, struct mbox_client *cl)
   357	{
   358		struct device *dev = cl->dev;
   359		unsigned long flags;
   360		int ret;
   361	
   362		if (chan->cl || !try_module_get(chan->mbox->dev->driver->owner)) {
   363			dev_dbg(dev, "%s: mailbox not free\n", __func__);
   364			return -EBUSY;
   365		}
   366	
   367		spin_lock_irqsave(&chan->lock, flags);
   368		chan->msg_free = 0;
   369		chan->msg_count = 0;
   370		chan->active_req = NULL;
   371		chan->cl = cl;
   372		init_completion(&chan->tx_complete);
   373	
   374		if (chan->txdone_method	== TXDONE_BY_POLL && cl->knows_txdone)
   375			chan->txdone_method = TXDONE_BY_ACK;
   376	
   377		spin_unlock_irqrestore(&chan->lock, flags);
   378	
   379		if (chan->mbox->ops->power_get) {
   380			ret = chan->mbox->ops->power_get(chan);
   381			if (ret < 0)
 > 382				return ERR_PTR(ret);
   383		}
   384	
   385		if (chan->mbox->ops->startup) {
   386			ret = chan->mbox->ops->startup(chan);
   387	
   388			if (ret) {
   389				dev_err(dev, "Unable to startup the chan (%d)\n", ret);
   390				mbox_free_channel(chan);
   391				return ret;
   392			}
   393		}
   394	
   395		return 0;
   396	}
   397	

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https://github.com/intel/lkp-tests/wiki