WDC_DMABufUnlock()

DWORD DLLCALLCONV WDC_DMABufUnlock

(

_In_ WD_DMA *

pDma

)

Unlocks and frees the memory allocated for a DMA buffer by a previous call to WDC_DMAContigBufLock(), WDC_DMASGBufLock() or WDC_DMAReservedBufLock()

Parameters

[in]

pDma

Pointer to a DMA information structure, received from a previous call to WDC_DMATransactionContigInit() (for a Contiguous DMA Buffer Transaction) or WDC_DMATransactionSGInit() (for a Scatter/Gather DMA buffer Transaction) *ppDma returned by these functions

Returns

Returns WD_STATUS_SUCCESS (0) on success, or an appropriate error code otherwise

For more detailed usage of the WDC_DMA functions, please refer to 11.2. Performing Direct Memory Access (DMA)