[Bug 104082] amdgpu 0000:07:00.0: swiotlb buffer is full (sz: 2097152 bytes)

https://bugs.freedesktop.org/show_bug.cgi?id=104082

--- Comment #43 from ojab ojab@ojab.ru --- Same here on ryzen 2400g + asus a320m-k w/ iommu disabled, vanilla kernel 4.16.4.

I'm not sure if it's another issue since it happens on driver loading and backtrace looks like:

[Wed Apr 25 20:18:50 2018] dump_stack+0x67/0x93 [Wed Apr 25 20:18:50 2018] swiotlb_alloc_coherent+0x1da/0x1f0 [Wed Apr 25 20:18:50 2018] amdgpu_ih_ring_init+0x1fc/0x2c0 [amdgpu] [Wed Apr 25 20:18:50 2018] vega10_ih_sw_init+0x18/0xb0 [amdgpu] [Wed Apr 25 20:18:50 2018] amdgpu_device_init+0xa35/0x11e0 [amdgpu] [Wed Apr 25 20:18:50 2018] amdgpu_driver_load_kms+0x56/0x170 [amdgpu]

but it happens after `swiotlb buffer is full` error, so writing here.