[PATCH 4.9 110/116] net: mvpp2: fix dma unmapping of TX buffers for fragments

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Thomas Petazzoni commit 8354491c9d5b06709384cea91d13019bf5e61449 upstream. Since commit 71ce391dfb784 ("net: mvpp2: enable proper per-CPU TX buffers

[PATCH 4.9 110/116] net: mvpp2: fix dma unmapping of TX buffers for fragments

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Thomas Petazzoni commit 8354491c9d5b06709384cea91d13019bf5e61449 upstream. Since commit 71ce391dfb784 ("net: mvpp2: enable proper per-CPU TX buffers unmapping"), we are not correctly DMA