NDIS_LOWER_IRQL macro (ndis.h)
The NDIS_LOWER_IRQL macro sets the IRQL on the current processor to the specified value.
Syntax
void NDIS_LOWER_IRQL(
_OldIrql_,
_CurIrql_
);
Parameters
_OldIrql_
The original (that is, unraised) IRQL value from before the driver called the NDIS_RAISE_IRQL_TO_DISPATCH macro. NDIS_LOWER_IRQL sets the IRQL to this value.
_CurIrql_
The current IRQL value that is active before the call to NDIS_LOWER_IRQL.
Return value
None
Remarks
NDIS network drivers should use the NDIS_LOWER_IRQL macro to restore the IRQL setting that existed before a call to the NDIS_RAISE_IRQL_TO_DISPATCH macro.
If the value that the _OldIrql_ parameter specifies is not equal to the current IRQL, the NDIS_LOWER_IRQL macro attempts to lower the IRQL to the value that the _OldIrql_ parameter specifies.
It is a fatal error to call NDIS_LOWER_IRQL and use a value for _OldIrql_ that was not returned from an immediately preceding call to the NDIS_RAISE_IRQL_TO_DISPATCH macro.
NDIS_LOWER_IRQL is an NDIS wrapper for the KeLowerIrql routine.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Supported in NDIS 6.0 and later. |
| Target Platform | Universal |
| Header | ndis.h |
| IRQL | Any level (see Remarks section) |
| DDI compliance rules | Irql_IrqlSetting_Function(ndis) |