Re: [BUG/RFC/PATCH] drm: Fix for non-coherent DMA PowerPC
From: Benjamin Herrenschmidt
Date: Sun Mar 02 2008 - 15:49:12 EST
> Xorg (v7.1.1, Debian Etch) crashes with this patch (applied to 2.6.25-rc3)
> on my AmigaOne with a Radeon 9200 (PCIGART mode enabled). See the attached
> log file for the stack trace.
That doesn't look possible, which is weird... looks like we are passing
0 to clean_dcache_range().
Interestingly enough, I can -see- possible issues with the ppc32 DMA API
when trying to use HIGHMEM but that isn't the case here...
Can you add printk's to ati_pcigart.c to print the arguments passed to
+ dma_sync_single_for_device(&dev->pdev->dev,
+ bus_address,
+ max_pages * sizeof(u32),
+ PCI_DMA_TODEVICE);
+
And also print the result of bus_to_virt(bus_address) ?
Ben.
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