Re: 5.1-rc1: mpt init crash in scsi_map_dma, dma_4v_map_sg on sparc64

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I think this might have been this commit:

commit 24132a419c68f1d69eb8ecc91b3c80d730ecbb59
Author: Christoph Hellwig <hch@xxxxxx>
Date:   Fri Feb 15 09:30:28 2019 +0100

     sparc64/pci_sun4v: allow large DMA masks

the patch below adds a few missing checks and hopefully should fix
your problem.  If not can you try to revert the commit to check if
my theory was correct to start with?
Yes, reverting this commit makes my T1000 boot.

--
Meelis Roos <mroos@xxxxxxxx>



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