[PATCH 3.18 163/185] dmaengine: pl330: fix a race condition in case of threaded irqs

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Qi Hou [ Upstream commit a3ca831249ca8c4c226e4ceafee04e280152e59d ] When booting up with "threadirqs" in command line, all irq handlers of the DMA controller pl330 will

[PATCH 3.18 163/185] dmaengine: pl330: fix a race condition in case of threaded irqs

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Qi Hou [ Upstream commit a3ca831249ca8c4c226e4ceafee04e280152e59d ] When booting up with "threadirqs" in command line, all irq handlers of the DMA controller pl330 will be threaded forcedly.