linux-kernel - drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:981 mlx5_esw_vport_vhca_id() warn: signedness bug returning '(-45)'

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Message-ID: <202512180851.WNLFBz7t-lkp@intel.com>
Date: Thu, 18 Dec 2025 10:05:24 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Saeed Mahameed <saeedm@...dia.com>
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Adithya Jayachandran <ajayachandra@...dia.com>,
	Parav Pandit <parav@...dia.com>, Feng Liu <feliu@...dia.com>,
	William Tu <witu@...dia.com>, Mark Bloch <mbloch@...dia.com>
Subject: drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:981
 mlx5_esw_vport_vhca_id() warn: signedness bug returning '(-45)'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ea1013c1539270e372fc99854bc6e4d94eaeff66
commit: 1baf30426553efb3ac518b0e9d5c1c3f8ed7762a net/mlx5: E-Switch, Set/Query hca cap via vhca id
config: alpha-randconfig-r073-20251217 (https://download.01.org/0day-ci/archive/20251218/202512180851.WNLFBz7t-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 14.3.0

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>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202512180851.WNLFBz7t-lkp@intel.com/

smatch warnings:
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:981 mlx5_esw_vport_vhca_id() warn: signedness bug returning '(-45)'

vim +981 drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

1baf30426553efb Saeed Mahameed 2025-06-16  978  static inline bool
1baf30426553efb Saeed Mahameed 2025-06-16  979  mlx5_esw_vport_vhca_id(struct mlx5_eswitch *esw, u16 vportn, u16 *vhca_id)
1baf30426553efb Saeed Mahameed 2025-06-16  980  {
1baf30426553efb Saeed Mahameed 2025-06-16 @981  	return -EOPNOTSUPP;

This should be either true or false since it's a bool function.

1baf30426553efb Saeed Mahameed 2025-06-16  982  }

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