From 366f0a30c8a01e79255221539a52909cc4c7bd25 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 20 Apr 2021 11:44:02 +0300 Subject: [PATCH] platform/surface: aggregator: fix a bit test The "funcs" variable is a u64. If "func" is more than 31 then the BIT() shift will wrap instead of testing the high bits. Fixes: c167b9c7e3d6 ("platform/surface: Add Surface Aggregator subsystem") Reported-by: kernel test robot Signed-off-by: Dan Carpenter Reviewed-by: Maximilian Luz Link: https://lore.kernel.org/r/YH6UUhJhGk3mk13b@mwanda Signed-off-by: Hans de Goede --- drivers/platform/surface/aggregator/controller.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/surface/aggregator/controller.c b/drivers/platform/surface/aggregator/controller.c index 00e38284885a..69e86cd599d3 100644 --- a/drivers/platform/surface/aggregator/controller.c +++ b/drivers/platform/surface/aggregator/controller.c @@ -1040,7 +1040,7 @@ static int ssam_dsm_load_u32(acpi_handle handle, u64 funcs, u64 func, u32 *ret) union acpi_object *obj; u64 val; - if (!(funcs & BIT(func))) + if (!(funcs & BIT_ULL(func))) return 0; /* Not supported, leave *ret at its default value */ obj = acpi_evaluate_dsm_typed(handle, &SSAM_SSH_DSM_GUID,