Kernel Warning when using 4.9.23 in imx6q

[zhoujustin]

I known the RTL8xxxxu was the supported from kernel4.8, but it couldn't used when I scanned the network. I'm using this driver, and when ip link set x up, The kernel print that information. Seems like the it worked well. pls help me.

[ 10.049360] ============================================= [ 10.054765] [ INFO: possible recursive locking detected ] [ 10.060173] 4.9.23-00053-g6d69a6c-dirty #4 Not tainted [ 10.065314] --------------------------------------------- [ 10.070717] connmand/288 is trying to acquire lock: [ 10.075599] (pmutex){+.+...}, at: [] usbctrl_vendorreq+0x78/0x200 [8723bu] [ 10.083787] but task is already holding lock: [ 10.088323] (pmutex){+.+...}, at: [] netdev_open+0x34/0x58 [8723bu] [ 10.095847] other info that might help us debug this: [ 10.101085] Possible unsafe locking scenario:

[ 10.101087] CPU0 [ 10.101089] ---- [ 10.101097] lock(pmutex); [ 10.101102] lock(pmutex); [ 10.101105] DEADLOCK

[ 10.101117] May be due to missing lock nesting notation

[ 10.101121] 2 locks held by connmand/288: [ 10.101145] #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x18/0x20 [ 10.101425] #1: (pmutex){+.+...}, at: [] netdev_open+0x34/0x58 [8723bu] [ 10.101428] stack backtrace: [ 10.101436] CPU: 3 PID: 288 Comm: connmand Not tainted 4.9.23-00053-g6d69a6c-dirty #4 [ 10.101440] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 10.101446] Backtrace: [ 10.101466] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 10.101473] r6:60000093 r5:ffffffff r4:00000000 r3:00000000 [ 10.101485] [] (show_stack) from [] (dump_stack+0xb0/0xe8) [ 10.101497] [] (dump_stack) from [] (lock_acquire+0x13f4/0x1848) [ 10.101504] r8:c0fe12f4 r7:ee3d1108 r6:c1654aa0 r5:ee3d0c40 r4:c0fe12f4 r3:ee3d0c40 [ 10.101511] [] (__lock_acquire) from [] (lock_acquire+0x78/0x98) [ 10.101518] r10:ed4b67c4 r9:ed4b67f8 r8:00000000 r7:00000001 r6:bf0fb70c r5:60000013 [ 10.101521] r4:00000000 [ 10.101536] [] (lock_acquire) from [] (mutex_lock_interruptible_nested+0x64/0x470) [ 10.101541] r7:c1642024 r6:ee3d0c40 r5:f2a52000 r4:00000000 [ 10.101777] [] (mutex_lock_interruptible_nested) from [] (usbctrl_vendorreq+0x78/0x200 [8723bu]) [ 10.101785] r10:ee33d800 r9:00000001 r8:00000000 r7:ed4b6000 r6:f2a58000 r5:f2a52000 [ 10.101788] r4:00000001 [ 10.102259] [] (usbctrl_vendorreq [8723bu]) from [] (usb_read8+0x38/0x44 [8723bu]) [ 10.102268] r10:00000001 r9:00000000 r8:00000000 r7:ed4b6000 r6:f2a58000 r5:f2a52000 [ 10.102271] r4:f2a52000 [ 10.102725] [] (usb_read8 [8723bu]) from [] (rtw_read8+0x1c/0x20 [8723bu]) [ 10.103175] [] (rtw_read8 [8723bu]) from [] (rtl8723bu_hal_init+0x38/0xc88 [8723bu]) [ 10.103640] [] (rtl8723bu_hal_init [8723bu]) from [] (rtw_hal_init+0x20/0x178 [8723bu]) [ 10.103648] r10:00000001 r9:00000000 r8:00000000 r7:edffa030 r6:f2a52000 r5:f2a52000 [ 10.103651] r4:ed4b6000 [ 10.104111] [] (rtw_hal_init [8723bu]) from [] (_netdev_open+0x70/0x218 [8723bu]) [ 10.104119] r8:00000000 r7:edffa030 r6:ed4b6000 r5:f2a52000 r4:edffa000 r3:00000000 [ 10.104585] [] (_netdev_open [8723bu]) from [] (netdev_open+0x3c/0x58 [8723bu]) [ 10.104592] r7:edffa030 r6:bf144f18 r5:edffa000 r4:f2a52000 [ 10.104829] [] (netdev_open [8723bu]) from [] (dev_open+0xa4/0x10c) [ 10.104834] r5:ffff9003 r4:edffa000 [ 10.104843] [] (__dev_open) from [] (dev_change_flags+0x90/0x158) [ 10.104848] r7:00001002 r6:00000001 r5:ffff9003 r4:edffa000 [ 10.104856] [] (dev_change_flags) from [] (dev_change_flags+0x20/0x50) [ 10.104864] r8:00000000 r7:ed441e0c r6:00001002 r5:00000148 r4:edffa000 r3:00008914 [ 10.104878] [] (dev_change_flags) from [] (devinet_ioctl+0x6d0/0x7e4) [ 10.104884] r8:00000000 r7:ed441e0c r6:bebb8ab0 r5:00000000 r4:edf6de68 r3:00008914 [ 10.104896] [] (devinet_ioctl) from [] (inet_ioctl+0x1b4/0x1c8) [ 10.104903] r10:ee4bb3e0 r9:edf6c000 r8:bebb8ab0 r7:ee4bb3c0 r6:bebb8ab0 r5:00000010 [ 10.104906] r4:00008914 [ 10.104917] [] (inet_ioctl) from [] (sock_ioctl+0x64/0x300) [ 10.104931] [] (sock_ioctl) from [] (do_vfs_ioctl+0x8c/0xa64) [ 10.104937] r7:edd3c000 r6:00008914 r5:00000010 r4:c022e6ac [ 10.104945] [] (do_vfs_ioctl) from [] (SyS_ioctl+0x3c/0x60) [ 10.104952] r10:00000000 r9:edf6c000 r8:00000010 r7:bebb8ab0 r6:00008914 r5:edd3c000 [ 10.104955] r4:edd3c000 [ 10.104967] [] (SyS_ioctl) from [] (ret_fast_syscall+0x0/0x1c) [ 10.104974] r8:c0108084 r7:00000036 r6:00000003 r5:00000010 r4:00000000 r3:00001002 [ 10.932808] RTL871X: RTW_ADAPTIVITYEN [ 10.936500] AUTO, chplan:0x20, Regulation:0,0 [ 10.940877] RTL871X: RTW_ADAPTIVITYMODE [ 10.944769] NORMAL [ 11.702261] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 13.224573] RTL871X: rtw_set_802_11_connect(wlan0) fw_state=0x00000008

[lwfinger]

Ignore that warning, unless you want to fix it. I have tried, but everything I do makes it worse.

[zhoujustin]

Thanks!!