246   if (hdma == NULL)  in HAL_DMA_Init()
328   if (hdma == NULL)  in HAL_DMA_DeInit()
381   hdma->XferCpltCallback     = NULL;  in HAL_DMA_DeInit()
382   hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_DeInit()
383   hdma->XferErrorCallback    = NULL;  in HAL_DMA_DeInit()
384   hdma->XferAbortCallback    = NULL;  in HAL_DMA_DeInit()
385   hdma->XferSuspendCallback  = NULL;  in HAL_DMA_DeInit()
388   hdma->LinkedListQueue = NULL;  in HAL_DMA_DeInit()
391   if (hdma->Parent != NULL)  in HAL_DMA_DeInit()
393     hdma->Parent = NULL;  in HAL_DMA_DeInit()
459   if (hdma == NULL)  in HAL_DMA_Start()
514   if (hdma == NULL)  in HAL_DMA_Start_IT()
541     if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_Start_IT()
548     if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_Start_IT()
586   if (hdma == NULL)  in HAL_DMA_Abort()
675   if (hdma == NULL)  in HAL_DMA_Abort_IT()
718   if (hdma == NULL)  in HAL_DMA_PollForTransfer()
965       if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1016         if (hdma->XferAbortCallback != NULL)  in HAL_DMA_IRQHandler()
1030         if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_IRQHandler()
1078       if (hdma->XferCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1114     if (hdma->XferErrorCallback != NULL)  in HAL_DMA_IRQHandler()
1139   if (hdma == NULL)  in HAL_DMA_RegisterCallback()
1217   if (hdma == NULL)  in HAL_DMA_UnRegisterCallback()
1231         hdma->XferCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1238         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1245         hdma->XferErrorCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1252         hdma->XferAbortCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1259         hdma->XferSuspendCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1266         hdma->XferCpltCallback     = NULL;  in HAL_DMA_UnRegisterCallback()
1267         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1268         hdma->XferErrorCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1269         hdma->XferAbortCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1270         hdma->XferSuspendCallback  = NULL;  in HAL_DMA_UnRegisterCallback()
1381   if (hdma == NULL)  in HAL_DMA_ConfigChannelAttributes()
1471   if ((hdma == NULL) || (pChannelAttributes == NULL))  in HAL_DMA_GetConfigChannelAttributes()
1516   if (hdma == NULL)  in HAL_DMA_LockChannelAttributes()
1548   if ((hdma == NULL) || (pLockState == NULL))  in HAL_DMA_GetLockChannelAttributes()