244   if (hdma == NULL)  in HAL_DMA_Init()
324   if (hdma == NULL)  in HAL_DMA_DeInit()
384   hdma->XferCpltCallback     = NULL;  in HAL_DMA_DeInit()
385   hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_DeInit()
386   hdma->XferErrorCallback    = NULL;  in HAL_DMA_DeInit()
387   hdma->XferAbortCallback    = NULL;  in HAL_DMA_DeInit()
388   hdma->XferSuspendCallback  = NULL;  in HAL_DMA_DeInit()
391   hdma->LinkedListQueue = NULL;  in HAL_DMA_DeInit()
394   if (hdma->Parent != NULL)  in HAL_DMA_DeInit()
396     hdma->Parent = NULL;  in HAL_DMA_DeInit()
462   if (hdma == NULL)  in HAL_DMA_Start()
517   if (hdma == NULL)  in HAL_DMA_Start_IT()
544     if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_Start_IT()
551     if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_Start_IT()
589   if (hdma == NULL)  in HAL_DMA_Abort()
678   if (hdma == NULL)  in HAL_DMA_Abort_IT()
721   if (hdma == NULL)  in HAL_DMA_PollForTransfer()
968       if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1019         if (hdma->XferAbortCallback != NULL)  in HAL_DMA_IRQHandler()
1033         if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_IRQHandler()
1081       if (hdma->XferCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1117     if (hdma->XferErrorCallback != NULL)  in HAL_DMA_IRQHandler()
1142   if (hdma == NULL)  in HAL_DMA_RegisterCallback()
1220   if (hdma == NULL)  in HAL_DMA_UnRegisterCallback()
1234         hdma->XferCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1241         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1248         hdma->XferErrorCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1255         hdma->XferAbortCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1262         hdma->XferSuspendCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1269         hdma->XferCpltCallback     = NULL;  in HAL_DMA_UnRegisterCallback()
1270         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1271         hdma->XferErrorCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1272         hdma->XferAbortCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1273         hdma->XferSuspendCallback  = NULL;  in HAL_DMA_UnRegisterCallback()
1384   if (hdma == NULL)  in HAL_DMA_ConfigChannelAttributes()
1474   if ((hdma == NULL) || (pChannelAttributes == NULL))  in HAL_DMA_GetConfigChannelAttributes()
1519   if (hdma == NULL)  in HAL_DMA_LockChannelAttributes()
1551   if ((hdma == NULL) || (pLockState == NULL))  in HAL_DMA_GetLockChannelAttributes()