Subject: [Bug 205201] Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M

From: [email-masked]
Date: Wed, 16 Oct 2019 21:48:17 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=205201

--- Comment #1 from Christian Zigotzky ([email-masked]) ---
I have the same problem with my analog PCI TV card Typhoon TView RDS + FM
Stereo (BT878 chip) in my AmigaOne X5000. It only works with reducing the mem
size to 3500MB (mem=3500M).
I figured out that the issue is somewhere in the PowerPC updates 4.21-1 [1].
Maybe the code change in the file "arch/powerpc/kernel/dma-swiotlb.c" [2] or
maybe the change in the file "arch/powerpc/kernel/dma.c" [3].

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8d6973327ee84c2f40dd9efd8928d4a1186c96e2

[2]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/arch/powerpc/kernel/dma-swiotlb.c?id=8d6973327ee84c2f40dd9efd8928d4a1186c96e2

[3]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/arch/powerpc/kernel/dma.c?id=8d6973327ee84c2f40dd9efd8928d4a1186c96e2

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