On Tue, Dec 11, 2018 at 6:23 PM Ricardo Salveti <rsalveti@xxxxxxxxxxxx> wrote: > > On Tue, Dec 11, 2018 at 6:12 PM Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > > > * John Stultz <john.stultz@xxxxxxxxxx> [181211 19:51]: > > > On Tue, Dec 11, 2018 at 11:25 AM Ricardo Salveti <rsalveti@xxxxxxxxxxxx> wrote: > > > > Then tried to reproduce with a simple 'while true; do ip link set dev > > > > wlan0 down; ip link set dev wlan0 up; done;' and it was already enough > > > > to cause the same hang. Adding a simple sleep 1 after down/up is > > > > already enough to make it work, so something might be missing during > > > > the down/up process that only happens when they get called right after > > > > the other. > > > > With while true test above, I'm getting: > > > > wlcore: ERROR timeout waiting for the hardware to complete initialization > > > > Then after ctrl-c, wlan0 connects to the access point just fine > > for me. > > > > Is that what you're seeing or some oops? Tried the same while true test on my beaglebone black wireless and also got a trace, but without hanging the kernel (sdio write failed instead): root@beaglebone-yocto:~# while true; do ifconfig wlan0 down; ifconfig wlan0 up; done; [ 31.467917] wlcore: down [ 33.205670] ------------[ cut here ]------------ [ 33.211048] WARNING: CPU: 0 PID: 407 at drivers/net/wireless/ti/wlcore/sdio.c:145 wl12xx_sdio_raw_write+0x134/0x1c0 [wlcore_sdio] [ 33.226358] Modules linked in: arc4 wl18xx wlcore mac80211 musb_dsps musb_hdrc cppi41 udc_core snd_soc_hdmi_codec phy_am335x phy_generic phy_am335x_control pm33xx snd_soc_simple_card snd_soc_simple_card_utils wkup_m3_ipc wkup_m3_rproc remoteproc virtio virtio_ring ti_emif_sram snd_soc_davinci_mcasp hci_uart snd_soc_edma snd_soc_sdma btqca btbcm tilcdc btintel snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer omap_mailbox wlcore_sdio snd soundcore musb_am335x rtc_omap at24 tda998x cpufreq_dt thermal_sys fuse bluetooth_6lowpan nhc_udp nhc_dest nhc_fragment nhc_hop nhc_ipv6 nhc_mobility nhc_routing 6lowpan [ 33.292595] CPU: 0 PID: 407 Comm: ifconfig Not tainted 4.20.0-rc6-lmp-standard #1 [ 33.304730] Hardware name: Generic AM33XX (Flattened Device Tree) [ 33.311136] Backtrace: [ 33.314930] [<c010f118>] (dump_backtrace) from [<c010f4b8>] (show_stack+0x20/0x24) [ 33.323540] r7:dc94cc10 r6:00000009 r5:00000000 r4:00000000 [ 33.329520] [<c010f498>] (show_stack) from [<c0a0f230>] (dump_stack+0x24/0x28) [ 33.338072] [<c0a0f20c>] (dump_stack) from [<c013a804>] (__warn.part.3+0xcc/0xe4) [ 33.346441] [<c013a738>] (__warn.part.3) from [<c013a99c>] (warn_slowpath_null+0x54/0x5c) [ 33.355623] r6:bf1393b4 r5:00000091 r4:bf13abe0 [ 33.360512] [<c013a948>] (warn_slowpath_null) from [<bf1393b4>] (wl12xx_sdio_raw_write+0x134/0x1c0 [wlcore_sdio]) [ 33.372301] r6:00004000 r5:c0f03088 r4:dd69ec00 [ 33.377244] [<bf139280>] (wl12xx_sdio_raw_write [wlcore_sdio]) from [<bf40b33c>] (wlcore_boot_upload_firmware+0x1ec/0x55c [wlcore]) [ 33.390554] r10:dca18000 r9:dcba4d60 r8:bf139280 r7:00014000 r6:bf41f480 r5:80904000 [ 33.399378] r4:00000001 [ 33.402673] [<bf40b150>] (wlcore_boot_upload_firmware [wlcore]) from [<bf436228>] (wl18xx_boot+0x8e4/0xd4c [wl18xx]) [ 33.414270] r10:00000000 r9:00000014 r8:c0cdf170 r7:bf41f480 r6:c0f03088 r5:00000000 [ 33.422993] r4:dcba4d60 [ 33.425722] [<bf435944>] (wl18xx_boot [wl18xx]) from [<bf3fba38>] (wl1271_op_add_interface+0x580/0x9b0 [wlcore]) [ 33.437644] r9:00000003 r8:dcba4da0 r7:bf41f480 r6:c0f03088 r5:dcba4d60 r4:00000000 [ 33.446685] [<bf3fb4b8>] (wl1271_op_add_interface [wlcore]) from [<bf345e10>] (drv_add_interface+0x58/0x1a8 [mac80211]) [ 33.458858] r10:00000000 r9:ffffffff r8:00000001 r7:de7eb4e0 r6:dcba4460 r5:dcba4460 [ 33.467670] r4:de7eb4e0 [ 33.470571] [<bf345db8>] (drv_add_interface [mac80211]) from [<bf35d3a0>] (ieee80211_do_open+0x490/0x984 [mac80211]) [ 33.482807] r7:de7eb4e0 r6:dcba4460 r5:de7eb000 r4:de7eb4e8 [ 33.488965] [<bf35cf10>] (ieee80211_do_open [mac80211]) from [<bf35d8e8>] (ieee80211_open+0x54/0x60 [mac80211]) [ 33.500593] r10:db2f2aa0 r9:00000000 r8:00001002 r7:c0f03088 r6:bf3a94e0 r5:c0f03088 [ 33.509482] r4:de7eb4e0 [ 33.512904] [<bf35d894>] (ieee80211_open [mac80211]) from [<c07fa648>] (__dev_open+0xec/0x170) [ 33.521946] r5:c0f03088 r4:de7eb000 [ 33.526686] [<c07fa55c>] (__dev_open) from [<c07faa68>] (__dev_change_flags+0x174/0x1d4) [ 33.535768] r6:00001043 r5:00000001 r4:de7eb000 [ 33.540656] [<c07fa8f4>] (__dev_change_flags) from [<c07faaf0>] (dev_change_flags+0x28/0x58) [ 33.550439] r9:00000000 r8:c0fa2060 r7:de7eb144 r6:00000000 r5:00001002 r4:de7eb000 [ 33.559205] [<c07faac8>] (dev_change_flags) from [<c0895d80>] (devinet_ioctl+0x6d4/0x704) [ 33.568345] r9:00000000 r8:c0fa2060 r7:dd0e4a0c r6:c0f03088 r5:dd1cbe08 r4:00000000 [ 33.576962] [<c08956ac>] (devinet_ioctl) from [<c0898048>] (inet_ioctl+0x214/0x3c4) [ 33.585575] r10:db2f2aa0 r9:00000004 r8:00000051 r7:c0fa2060 r6:00008914 r5:be9f7b0c [ 33.594298] r4:c0f03088 [ 33.596979] [<c0897e34>] (inet_ioctl) from [<c07d4b14>] (sock_ioctl+0x1d0/0x4e0) [ 33.605773] r9:00000004 r8:c0fa2060 r7:be9f7b0c r6:dccc9b40 r5:c0f03088 r4:00008914 [ 33.614530] [<c07d4944>] (sock_ioctl) from [<c02e4b9c>] (do_vfs_ioctl+0xc0/0x95c) [ 33.622983] r9:00000004 r8:be9f7b0c r7:00000004 r6:dccc9b40 r5:be9f7b0c r4:c0f03088 [ 33.631144] [<c02e4adc>] (do_vfs_ioctl) from [<c02e54a4>] (ksys_ioctl+0x6c/0x90) [ 33.639762] r10:00000036 r9:00000004 r8:be9f7b0c r7:00008914 r6:00000000 r5:dccc9b40 [ 33.648502] r4:dccc9b40 [ 33.651177] [<c02e5438>] (ksys_ioctl) from [<c02e54e0>] (sys_ioctl+0x18/0x1c) [ 33.659609] r9:dd1ca000 r8:c0101204 r7:00000036 r6:b6fdb900 r5:004d5e44 r4:be9f7b0c [ 33.668370] [<c02e54c8>] (sys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x54) [ 33.676833] Exception stack(0xdd1cbfa8 to 0xdd1cbff0) [ 33.682604] bfa0: be9f7b0c 004d5e44 00000004 00008914 be9f7b0c 00001002 [ 33.691187] bfc0: be9f7b0c 004d5e44 b6fdb900 00000036 be9f7bec 004d6384 004d5e44 be9f7efe [ 33.700592] bfe0: 004d5ec4 be9f7afc 004bf0d1 b6f520f8 [ 33.706359] ---[ end trace 39415e1e5f535790 ]--- [ 33.711217] wl1271_sdio mmc2:0001:2: sdio write failed (-110) Looks like it could be the same issue, but showing up differently on hikey due the mmc controller used. Thanks, -- Ricardo Salveti de Araujo
