[PATCH 5/7] DMA: Freescale: change descriptor release process for supporting async_tx

From: Hongbo Zhang Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is lack of support in current release process of dma descriptor, all descriptors will be released whatever is acked or no-acked by async_tx, so there is a potential race condition when dma engine is uesd

[PATCH 5/7] DMA: Freescale: change descriptor release process for supporting async_tx

From: Hongbo Zhang hongbo.zh...@freescale.com Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is lack of support in current release process of dma descriptor, all descriptors will be released whatever is acked or no-acked by async_tx, so there is a potential race