Petr Pisar <petr.pisar@xxxxxxxx> writes: > V Sat, Sep 04, 2021 at 08:20:57PM +0200, Petr Pisar napsal(a): >> Hello, >> >> after upgrading Linux from 5.13.13 to 5.14.0 on my router with this wireless >> device: >> >> 03:00.0 Network controller [0280]: Qualcomm Atheros AR93xx Wireless Network Adapter [168c:0030] (rev 01) >> Subsystem: Qualcomm Atheros AR93xx Wireless Network Adapter [168c:3116] >> Flags: bus master, fast devsel, latency 0, IRQ 18 >> Memory at 81200000 (64-bit, non-prefetchable) [size=128K] >> Expansion ROM at 81220000 [disabled] [size=64K] >> Capabilities: [40] Power Management version 3 >> Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+ >> Capabilities: [70] Express Endpoint, MSI 00 >> Capabilities: [100] Advanced Error Reporting >> Capabilities: [140] Virtual Channel >> Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00 >> Kernel driver in use: ath9k >> Kernel modules: ath9k >> >> which works as a WiFi accesspoint, I noticed that WiFi clients cannot use IPv6 >> anymore. The problem is that the router cannot translate an IPv6 address of >> the client to a MAC address. The reason is that IPv6 multicast packets used by >> ICMPv6 neighbour discovery protocol do not reach the clients. In other words >> the ath9k-driven device stopped transmitting multicast frames. > > The same observation was reported here by Felix Fietkau in "[PATCH] Revert > "mac80211: do not use low data rates for data frames with no ack flag"" > <https://marc.info/?l=linux-wireless&m=163091738109000&w=2> with a proposal to > revert the offending d333322361e7a099dc74df2498d3fa5fde5c4fa7 commit. Very good, thanks for the followup. -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
