Hi, I've been seeing frequent kernel panics on wifi activity (scp-ing a lot of files) with 4.13 on 2 different systems which both use a brcmfmac4356-pcie wifi chip. This is with this fix: https://www.spinics.net/lists/linux-wireless/msg164178.html already applied. Here is a picture of the panic: https://fedorapeople.org/~jwrdegoede/brcmfmac4356-pcie-4.13-panic.jpg Reverting commit 270a6c1f65fe ("brcmfmac: rework headroom check in .start_xmit()"): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=270a6c1f65fe68a28a5d39cd405592c550b496c7 seems to fix this (I can no longer quickly reproduce the panic by scp-ing a large amount of files). Note I've first reverted the: https://www.spinics.net/lists/linux-wireless/msg164178.html fix so that I could cleanly revert commit 270a6c1f65fe. Given that no code seems to use the statics commit 270a6c1f65fe offers and it has been the cause of 2 different regressions now, it might be best to just revert 270a6c1f65fe for 4.13. Regards, Hans
