platform/mellanox: Check devm_hwmon_device_register_with_groups() return value

[ Upstream commit 3494a594315b56516988afb6854d75dee5b501db ]

devm_hwmon_device_register_with_groups() returns an error pointer upon
failure. Check its return value for errors.

Compile-tested only.

Fixes: 1a218d312e65 ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField PMC driver")
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Suggested-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20231201055447.2356001-1-chentao@kylinos.cn
[ij: split the change into two]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c
index 925bfc4..db7a1d3 100644 (file)
--- a/drivers/platform/mellanox/mlxbf-pmc.c
+++ b/drivers/platform/mellanox/mlxbf-pmc.c
@@ -1454,6 +1454,8 @@ static int mlxbf_pmc_probe(struct platform_device *pdev)
 
        pmc->hwmon_dev = devm_hwmon_device_register_with_groups(
                dev, "bfperf", pmc, pmc->groups);
+       if (IS_ERR(pmc->hwmon_dev))
+               return PTR_ERR(pmc->hwmon_dev);
        platform_set_drvdata(pdev, pmc);
 
        return 0;