Messages in this thread | | | Date | Mon, 28 Jun 2010 16:50:05 -0700 | Subject | BUG in drivers/dma/ioat/dma_v2.c:314 | From | Chris Li <> |
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Hi Dan,
My Mac Pro hit this BUG every time it try to load module ioatdma.
This was first discover in FC 12 & 13 kernel. See redhat bug 605845. https://bugzilla.redhat.com/show_bug.cgi?id=605845. I attach a picture of the kernel panic on the bug.
The current git tree has it as well. The bug line number change a little bit though.
/* when halted due to errors check for channel * programming errors before advancing the completion state */ if (is_ioat_halted(status)) { u32 chanerr;
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); dev_err(to_dev(chan), "%s: Channel halted (%x)\n", __func__, chanerr); BUG_ON(is_ioat_bug(chanerr)); <--------------------------------- }
The machine is a Mac Pro. The bug is reproducible 100%. Black list the ioatdma module and the kernel boot just fine.
Any suggestion? I am not afraid to try out patches.
Thanks
Chris
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