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Subject: Re: [Bug 206175] Fedora >= 5.4 kernels instantly freeze on boot
 without producing any display output
To: Christoph Hellwig <hch@lst.de>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        iommu@lists.linux-foundation.org
References: <bug-206175-5873@https.bugzilla.kernel.org/>
 <bug-206175-5873-S6PaNNClEr@https.bugzilla.kernel.org/>
 <CAHk-=wi4GS05j67V0D_cRXRQ=_Jh-NT0OuNpF-JFsDFj7jZK9A@mail.gmail.com>
 <20200310162342.GA4483@lst.de>
 <CAHk-=wgB2YMM6kw8W0wq=7efxsRERL14OHMOLU=Nd1OaR+sXvw@mail.gmail.com>
 <20200310182546.GA9268@lst.de> <20200311152453.GB23704@lst.de>
From: "Artem S. Tashkinov" <aros@gmx.com>
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Date: Wed, 11 Mar 2020 15:34:38 +0000
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On 3/11/20 3:24 PM, Christoph Hellwig wrote:
> pdev->dma_mask = parent->dma_mask ? *parent->dma_mask : 0;

This patch makes no difference.

The kernel panics with the same call trace which starts with:

RIP: 0010:kmem_cache_alloc_trace
...

? acpi_ds_create_walk_state
acpi_ds_create_walk_state
acpi_ds_call_control_method
acpi_ds_parse_aml
acpi_ps_execute_method
acpi_ns_evaluate
acpi_ut_evaluate_object
...