I do have two systems that fail iwlwifi probe on 4.17.x (in my case 4.17.2): System 1: ========= Supermicro X11DAi-N 87:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73) [ 3.138151] iwlwifi: probe of 0000:87:00.0 failed with error -12 System 2: ========= XMG P7xxDM(-G) 3d:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a) [ 2.896529] iwlwifi: probe of 0000:3d:00.0 failed with error -12 I did do a git bisect on system 2 and found the following commit to be the culprit for this system: [b468620f2a1dfdcfddfd6fa54367b8bcc1b51248] iommu/amd_iommu: Use CONFIG_DMA_DIRECT_OPS=y and dma_direct_{alloc,free}() Reverting this commit on sys-kernel/gentoo-sources-4.17.2 enables the iwlwifi probe (iwlwifi is working). I do not dare to try this on system 1 until someone convinces me that reverting the stated commit has no problematic side effects.
Nice bisect. It looks like this commit has been reverted in Linus's tree. I'll queue up the revert for gentoo-sources, but I should check kernel-stable and really submit this revert for greg-kh's stable series.
stable was CC'ed on the patch, so it should make it into 4.17.3. But it will make it into gentoo-sources-4.17.3 either from upstream or our patchset.
Which firmware are you using Andreas?
The same issue happens on my laptop but with intel_iommu commit on stable tree: d657c5c73ca987214a6f9436e435b34fc60f332a but this commit has not been reverted (so far at least). Reverting it makes the iwlwifi working again, as expected. I already reported the problem upstream on lkml, tbh I did't checked if it was already reported also for intel :). Waiting for answers.
Available in gentoo-sources kernels >= 4.17.3. If this problem persists, please re-open this.
