Subject: Re: [linux-next/mainline][bisected 3acac06][ppc] Oops when unloading mpt3sas driver

From: Abdul Haleem <[email-masked]>
Date: Tue, 25 Feb 2020 11:50:44 +0530

On Fri, 2020-01-17 at 18:21 +0530, Abdul Haleem wrote:
> On Thu, 2020-01-16 at 09:44 -0800, Christoph Hellwig wrote:
> > Hi Abdul,
> > 
> > I think the problem is that mpt3sas has some convoluted logic to do
> > some DMA allocations with a 32-bit coherent mask, and then switches
> > to a 63 or 64 bit mask, which is not supported by the DMA API.
> > 
> > Can you try the patch below?
> 
> Thank you Christoph, with the given patch applied the bug is not seen.
> 
> rmmod of mpt3sas driver is successful, no kernel Oops
> 
> Reported-and-tested-by: Abdul Haleem <[email-masked]>

Hi Christoph,

I see the patch is under discussion, will this be merged upstream any
time soon ? as boot is broken on our machines with out your patch.

-- 
Regard's

Abdul Haleem
IBM Linux Technology Centre