When building with -Wincompatible-function-pointer-types-strict, a
warning designed to catch potential kCFI failures at build time rather
than run time due to incorrect function pointer types, there is a
warning due to a mismatch between the type of the mode parameter in
mlx5_dpll_device_mode_get() vs. what the function pointer prototype for
->mode_get() in 'struct dpll_device_ops' expects.
drivers/net/ethernet/mellanox/mlx5/core/dpll.c:141:14: error: incompatible function pointer types initializing 'int (*)(const struct dpll_device *, void *, enum dpll_mode *, struct netlink_ext_ack *)' with an expression of type 'int (const struct dpll_device *, void *, u32 *, struct netlink_ext_ack *)' (aka 'int (const struct dpll_device *, void *, unsigned int *, struct netlink_ext_ack *)') [-Werror,-Wincompatible-function-pointer-types-strict]
141 | .mode_get = mlx5_dpll_device_mode_get,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
Change the type of the mode parameter in mlx5_dpll_device_mode_get() to
clear up the warning and avoid kCFI failures at run time.
Fixes: 496fd0a26bbf ("mlx5: Implement SyncE support using DPLL infrastructure")
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
---
To: saeedm@xxxxxxxxxx
To: leon@xxxxxxxxxx
Cc: linux-rdma@xxxxxxxxxxxxxxx
---
drivers/net/ethernet/mellanox/mlx5/core/dpll.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dpll.c b/drivers/net/ethernet/mellanox/mlx5/core/dpll.c
index 74f0c7867120..2cd81bb32c66 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/dpll.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/dpll.c
@@ -121,8 +121,8 @@ static int mlx5_dpll_device_lock_status_get(const struct dpll_device *dpll,
}
static int mlx5_dpll_device_mode_get(const struct dpll_device *dpll,
- void *priv,
- u32 *mode, struct netlink_ext_ack *extack)
+ void *priv, enum dpll_mode *mode,
+ struct netlink_ext_ack *extack)
{
*mode = DPLL_MODE_MANUAL;
return 0;
--
2.42.0
