[Bug 90861] Panic on suspend from KDE with radeon

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=90861

--- Comment #14 from Jon Arne Jørgensen <jonjon.arnearne at gmail.com> ---
I'm sorry to report that attachment 166571 doesn't fix the crash,
but I can also report that your suggestion from Bug 90741 comment 60 does fix
the crash.

That is, attachment 166571 +
if (fence->ring == R600_RING_TYPE_DMA_INDEX) udelay(50); in
radeon_fence_enable_signaling? after the irq_get.

I tried with udelay(50);, and mb(); both seems to work.

I was not able to compile the kernel with "RREG32(DMA_CNTL +
DMA0_REGISTER_OFFSET);" because of missing defines.
What header should I include?

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