246   if (hdma == NULL)  in HAL_DMA_Init()
328   if (hdma == NULL)  in HAL_DMA_DeInit()
388   hdma->XferCpltCallback     = NULL;  in HAL_DMA_DeInit()
389   hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_DeInit()
390   hdma->XferErrorCallback    = NULL;  in HAL_DMA_DeInit()
391   hdma->XferAbortCallback    = NULL;  in HAL_DMA_DeInit()
392   hdma->XferSuspendCallback  = NULL;  in HAL_DMA_DeInit()
395   hdma->LinkedListQueue = NULL;  in HAL_DMA_DeInit()
398   if (hdma->Parent != NULL)  in HAL_DMA_DeInit()
400     hdma->Parent = NULL;  in HAL_DMA_DeInit()
466   if (hdma == NULL)  in HAL_DMA_Start()
521   if (hdma == NULL)  in HAL_DMA_Start_IT()
548     if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_Start_IT()
555     if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_Start_IT()
593   if (hdma == NULL)  in HAL_DMA_Abort()
682   if (hdma == NULL)  in HAL_DMA_Abort_IT()
725   if (hdma == NULL)  in HAL_DMA_PollForTransfer()
972       if (hdma->XferHalfCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1026         if (hdma->XferAbortCallback != NULL)  in HAL_DMA_IRQHandler()
1040         if (hdma->XferSuspendCallback != NULL)  in HAL_DMA_IRQHandler()
1088       if (hdma->XferCpltCallback != NULL)  in HAL_DMA_IRQHandler()
1127     if (hdma->XferErrorCallback != NULL)  in HAL_DMA_IRQHandler()
1152   if (hdma == NULL)  in HAL_DMA_RegisterCallback()
1230   if (hdma == NULL)  in HAL_DMA_UnRegisterCallback()
1244         hdma->XferCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1251         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1258         hdma->XferErrorCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1265         hdma->XferAbortCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1272         hdma->XferSuspendCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1279         hdma->XferCpltCallback     = NULL;  in HAL_DMA_UnRegisterCallback()
1280         hdma->XferHalfCpltCallback = NULL;  in HAL_DMA_UnRegisterCallback()
1281         hdma->XferErrorCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1282         hdma->XferAbortCallback    = NULL;  in HAL_DMA_UnRegisterCallback()
1283         hdma->XferSuspendCallback  = NULL;  in HAL_DMA_UnRegisterCallback()
1394   if (hdma == NULL)  in HAL_DMA_ConfigChannelAttributes()
1484   if ((hdma == NULL) || (pChannelAttributes == NULL))  in HAL_DMA_GetConfigChannelAttributes()
1529   if (hdma == NULL)  in HAL_DMA_LockChannelAttributes()
1561   if ((hdma == NULL) || (pLockState == NULL))  in HAL_DMA_GetLockChannelAttributes()