On Tue, Jun 25, 2019 at 08:40:01AM +0200, John Paul Adrian Glaubitz wrote: > Hi Christoph! > > On 6/21/19 10:08 PM, Frank Scheiner wrote: > > recent testing of a Debian v4.19.37 kernel showed a problem on my rx2800 > > i2 happening during kernel boot: > > (...) > > [1]: > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=543cea9accd9804307541cb93d3ed7ec94b07237 > > Do you have any idea what could be the reason for the issue introduced > by your above commit? James Clarke has guess that it might be GFP_DMA32 > which isn't being set properly anymore for the affected machines. > > Do you think we could test a kernel which just sets the flag unconditionally > to see whether this is the problem that causes the issues on these machines? Might be worth a test. Do you know what device failed? Might be one with a dma mask < 32-bit?