Messages in this thread | | | From | Fabio Coatti <> | Subject | iwlwifi problem with iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent() | Date | Sun, 01 Jul 2018 17:42:59 +0200 |
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Hi all, since kernel 4.17 my laptop fails to enable wireless card (04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a) ) with this error:
Jul 01 09:34:36 hobbes kernel: iwlwifi: probe of 0000:04:00.0 failed with error -12
I bisected the issue to this result: d657c5c73ca987214a6f9436e435b34fc60f332a is the first bad commit commit d657c5c73ca987214a6f9436e435b34fc60f332a Author: Christoph Hellwig <hch@lst.de> Date: Mon Mar 19 11:38:20 2018 +0100
iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent() Use the dma_direct_*() helpers and clean up the code flow. Tested-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: Jon Mason <jdmason@kudzu.us> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Muli Ben-Yehuda <mulix@mulix.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20180319103826.12853-9-hch@lst.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
:040000 040000 9b907b7d761c6121d603c649421749ffd4e13999 2f396bd9e11c46e865a46107cd3cc9ef6f9ee6dd M drivers
By reverting this commit the card works again, tested in 4.17.3 . I've noticed that the corresponding amd commit ( b468620f2a1dfdcfddfd6fa54367b8bcc1b51248) has been reverted in linus tree (e16c4790de39dc861b749674c2a9319507f6f64f), and 4.16.X stable tree iirc, but the intel one has not been reverted.
hw: Lenovo P50 Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
Please let me know if more details are needed, but CC: me as I'm not currently subscribed to LKML.
many thanks.
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