Re: [PATCH v2 6/7] ACPI/IORT: Don't set default coherent DMA mask

2018-07-25 Thread Robin Murphy
On 2018-07-25 4:27 PM, Lorenzo Pieralisi wrote: On Mon, Jul 23, 2018 at 11:16:11PM +0100, Robin Murphy wrote: Now that we can track upstream DMA constraints properly with bus_dma_mask instead of trying (and failing) to maintain it in coherent_dma_mask, it doesn't make much sense for the firmware

Re: [PATCH v2 6/7] ACPI/IORT: Don't set default coherent DMA mask

2018-07-25 Thread Lorenzo Pieralisi
On Mon, Jul 23, 2018 at 11:16:11PM +0100, Robin Murphy wrote: > Now that we can track upstream DMA constraints properly with > bus_dma_mask instead of trying (and failing) to maintain it in > coherent_dma_mask, it doesn't make much sense for the firmware code to > be touching the latter at all. It'

[PATCH v2 6/7] ACPI/IORT: Don't set default coherent DMA mask

2018-07-23 Thread Robin Murphy
Now that we can track upstream DMA constraints properly with bus_dma_mask instead of trying (and failing) to maintain it in coherent_dma_mask, it doesn't make much sense for the firmware code to be touching the latter at all. It's merely papering over bugs wherein a driver has failed to call dma_se