Hi Maxim, On Thu, Jul 16, 2020 at 1:29 AM Maxim Levitsky <mlevitsk@xxxxxxxxxx> wrote: > > Hi, > > Few days ago I bisected a recent regression in the 5.8 kernel: > > git bisect start > # good: [3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162] Linux 5.7 > git bisect good 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 > # bad: [dcde237b9b0eb1d19306e6f48c0a4e058907619f] Merge tag 'perf-tools-fixes-2020-07-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux > git bisect bad dcde237b9b0eb1d19306e6f48c0a4e058907619f > # bad: [a0a4d17e02a80a74a63c7cbb7bc8cea2f0b7d8b1] Merge branch 'pcmcia-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux > git bisect bad a0a4d17e02a80a74a63c7cbb7bc8cea2f0b7d8b1 > # good: [09587a09ada2ed7c39aedfa2681152b5ac5641ee] arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined > git bisect good 09587a09ada2ed7c39aedfa2681152b5ac5641ee > # good: [3248044ecf9f91900be5678919966715f1fb8834] Merge tag 'wireless-drivers-next-2020-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next > git bisect good 3248044ecf9f91900be5678919966715f1fb8834 > # bad: [cb8e59cc87201af93dfbb6c3dccc8fcad72a09c2] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next > git bisect bad cb8e59cc87201af93dfbb6c3dccc8fcad72a09c2 > # bad: [b8215dce7dfd817ca38807f55165bf502146cd68] selftests/bpf, flow_dissector: Close TAP device FD after the test > git bisect bad b8215dce7dfd817ca38807f55165bf502146cd68 > # good: [b8ded9de8db34dd209a3dece94cf54fc414e78f7] net/smc: pre-fetch send buffer outside of send_lock > git bisect good b8ded9de8db34dd209a3dece94cf54fc414e78f7 > # good: [1079a34c56c535c3e27df8def0d3c5069d2de129] Merge tag 'mac80211-next-for-davem-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next > git bisect good 1079a34c56c535c3e27df8def0d3c5069d2de129 > # bad: [f395b69f40f580491ef56f2395a98e3189baa53c] dpaa2-eth: Add PFC support through DCB ops > git bisect bad f395b69f40f580491ef56f2395a98e3189baa53c > # bad: [a74d19ba7c41b6c1e424ef4fb7d4600f43ff75e5] net: fec: disable correct clk in the err path of fec_enet_clk_enable > git bisect bad a74d19ba7c41b6c1e424ef4fb7d4600f43ff75e5 > # bad: [dafe2078a75af1abe4780313ef8dd8491ba8598f] ipv4: nexthop: Fix deadcode issue by performing a proper NULL check > git bisect bad dafe2078a75af1abe4780313ef8dd8491ba8598f > # bad: [feac90d756c03b03b83fabe83571bd88ecc96b78] Bluetooth: hci_qca: Fix suspend/resume functionality failure > git bisect bad feac90d756c03b03b83fabe83571bd88ecc96b78 > # good: [a228f7a410290d836f3a9f9b1ed5aef1aab25cc7] Bluetooth: hci_qca: Enable WBS support for wcn3991 > git bisect good a228f7a410290d836f3a9f9b1ed5aef1aab25cc7 > # bad: [755dfcbca83710fa967d0efa7c5bb601f871a747] Bluetooth: Fix assuming EIR flags can result in SSP authentication > git bisect bad 755dfcbca83710fa967d0efa7c5bb601f871a747 > # bad: [3ca44c16b0dcc764b641ee4ac226909f5c421aa3] Bluetooth: Consolidate encryption handling in hci_encrypt_cfm > git bisect bad 3ca44c16b0dcc764b641ee4ac226909f5c421aa3 > # first bad commit: [3ca44c16b0dcc764b641ee4ac226909f5c421aa3] Bluetooth: Consolidate encryption handling in hci_encrypt_cfm We just merged a fix for that: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=339ddaa626995bc6218972ca241471f3717cc5f4 > The sympthoms are that I am unable to pair the headphones, and even if I use an older kernel > to pair them, and then switch to the new kernel, the connection is established only sometimes. > > Without this commit, I can pair the headphones 100% of the time. > > I am not familiar with bluetooth debugging but I am willing to provide > any logs, do tests and try patches. > > I am running fedora 32 on the affected system which has built-in intel wireless/bluetooth card, > > PCI (wifi) part: > 47:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a) > > USB (bluetooth) parrt: > Bus 011 Device 004: ID 8087:0029 Intel Corp. > > My .config attached (custom built kernel) > > Best regards, > Maxim Levitsky > -- Luiz Augusto von Dentz
