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 <[email protected]> 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 <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Jon Mason <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Muli Ben-Yehuda <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> :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.
