Messages in this thread | | | Date | Mon, 5 Dec 2016 11:20:48 +0100 | From | Joerg Roedel <> | Subject | Re: 4.3 kernel panics when MMC/SDHC card is inserted on thinkpad |
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Hi David,
On Sun, Dec 04, 2016 at 06:57:57PM -0600, David F wrote: > Aug 19 13:32:20 taz [ 156.425627] ------------[ cut here ]------------ > Aug 19 13:32:20 taz [ 156.428136] kernel BUG at > drivers/iommu/intel-iommu.c:3682!
This BUG_ON triggered because the IOMMU driver can't find a domain for the device passed to intel_unmap. This looks like an IOMMU bug, but I am not 100% sure yet, because if there is no domain for a device the intel_map_page path returns 0 and the intel_unmap function should not be called.
I need a couple of things to track this down. Can you please build a kernel with CONFIG_DMA_API_DEBUG=y and boot the kernel with IOMMU disabled? Insert and remove an SD-Card with this kernel and send me a full dmesg.
Please also send me the output of 'lspci -v' and a full dmesg with IOMMU enabled and the BUG triggered.
Thanks,
Joerg
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