Re: [PATCH v5 27/38] xen: gntdev: fix common struct sg_table related issues

2020-05-17 Thread Jürgen Groß
On 13.05.20 15:32, Marek Szyprowski wrote: The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the orig

[PATCH v5 27/38] xen: gntdev: fix common struct sg_table related issues

2020-05-13 Thread Marek Szyprowski
The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_