6.15-stable review patch. If anyone has any objections, please let me know.
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From: Alok Tiwari alok.a.tiwari@oracle.com
[ Upstream commit 644bec18e705ca41d444053407419a21832fcb2f ]
Fixes a logic issue in mlxreg_lc_completion_notify() where the intention was to check if MLXREG_LC_POWERED flag is not set before powering on the device.
The original code used "state & ~MLXREG_LC_POWERED" to check for the absence of the POWERED bit. However this condition evaluates to true even when other bits are set, leading to potentially incorrect behavior.
Corrected the logic to explicitly check for the absence of MLXREG_LC_POWERED using !(state & MLXREG_LC_POWERED).
Fixes: 62f9529b8d5c ("platform/mellanox: mlxreg-lc: Add initial support for Nvidia line card devices") Suggested-by: Vadim Pasternak vadimp@nvidia.com Signed-off-by: Alok Tiwari alok.a.tiwari@oracle.com Link: https://lore.kernel.org/r/20250630105812.601014-1-alok.a.tiwari@oracle.com 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 --- drivers/platform/mellanox/mlxreg-lc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/platform/mellanox/mlxreg-lc.c b/drivers/platform/mellanox/mlxreg-lc.c index aee395bb48ae4..8681ceb7144ba 100644 --- a/drivers/platform/mellanox/mlxreg-lc.c +++ b/drivers/platform/mellanox/mlxreg-lc.c @@ -688,7 +688,7 @@ static int mlxreg_lc_completion_notify(void *handle, struct i2c_adapter *parent, if (regval & mlxreg_lc->data->mask) { mlxreg_lc->state |= MLXREG_LC_SYNCED; mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_SYNCED, 1); - if (mlxreg_lc->state & ~MLXREG_LC_POWERED) { + if (!(mlxreg_lc->state & MLXREG_LC_POWERED)) { err = mlxreg_lc_power_on_off(mlxreg_lc, 1); if (err) goto mlxreg_lc_regmap_power_on_off_fail;