Hello Christoph,
I have found the issue. :-)
GFP_DMA32 was renamed to GFP_DMA in the PowerPC updates 4.21-1 in
December last year.
Some PCI devices still use GFP_DMA32 (grep -r GFP_DMA32 *). I renamed
GFP_DMA32 to GFP_DMA in the file
"drivers/media/v4l2-core/videobuf-dma-sg.c". After compiling the RC7 of
kernel 5.4 my TV card works again.
Cheers,
Christian
On 12 November 2019 at 3:41 pm, Christoph Hellwig wrote:
On Mon, Nov 11, 2019 at 01:22:55PM +0100, Christian Zigotzky wrote:
Now, I can definitely say that this patch does not solve the issue.
Do you have another patch for testing or shall I bisect?
I'm still interested in the .config and dmesg. Especially if the
board is using arch/powerpc/sysdev/fsl_pci.c, which is the only
place inside the powerpc arch code doing funny things with the
bus_dma_mask, which Robin pointed out looks fishy.
Thanks,
Christian
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