Hi, On Wed, Apr 27, 2016 at 02:21:36PM +1000, Craig McQueen wrote: > I have a D-Link DWA-140 USB Wi-Fi device which is rt2800 based (5392 chipset). I've been testing it on a BeagleBone Black running an Ubuntu 16.04 image (4.4.6 kernel). > > 1) Install Ubuntu 16.04 on a BeagleBone Black. > 2) Add lines to /etc/network/interfaces for the device to connect to a WPA2 access point. > 3) Plug the rt2800 USB Wi-Fi device into the BeagleBone Black. > > Apparently when it tries to connect to the access point, I get a kernel panic. If I don't configure it (step 2 above) then the kernel panic doesn't happen. > > I've tested this with two access points: my Android phone acting as a hotspot, and a cheap TP-Link TD-W8968. > > Serial debug console shows: > > [ 306.884793] ieee80211 phy0: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x1004 with error -110 > [ 306.996804] ieee80211 phy0: rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x1004 with error -110 > [ 307.057021] ieee80211 phy0: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x0500 with error -19 > [ 307.102417] Unable to handle kernel NULL pointer dereference at virtual address 0000002c > [ 307.110768] pgd = ddd34000 > [ 307.113555] [0000002c] *pgd=00000000 > [ 307.117257] Internal error: Oops: 5 [#1] SMP THUMB2 > [ 307.122269] Modules linked in: arc4 rt2800usb rt2800lib rt2x00usb rt2x00lib mac80211 crc_ccitt cfg80211 rfkill snd_soc_simple_card omap_aes omap_sham usb_f_ecm g_ether usb_f_rndis u_ether libcomposite omap_rng rng_core snd_soc_davinci_mcasp snd_soc_edma snd_soc_omap spi_omap2_mcspi snd_soc_hdmi_codec snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer snd soundcore evdev uio_pdrv_genirq uio tilcdc tda998x > [ 307.159448] CPU: 0 PID: 875 Comm: wpa_supplicant Not tainted 4.4.6-ti-r15 #1 > [ 307.166672] Hardware name: Generic AM33XX (Flattened Device Tree) > [ 307.172921] task: dcf56180 ti: dd8e6000 task.ti: dd8e6000 > [ 307.178470] PC is at _raw_spin_lock_irqsave+0x14/0x40 > [ 307.183755] LR is at rt2x00queue_get_entry+0x1e/0x54 [rt2x00lib] > [ 307.189928] pc : [<c06e2560>] lr : [<bfa9b99b>] psr: 800b01b3 > [ 307.189928] sp : dd8e79a0 ip : 00000000 fp : dc94f900 > [ 307.201687] r10: c0b5ba88 r9 : dcda6928 r8 : dcda692c > [ 307.207042] r7 : 00000054 r6 : 0000002c r5 : 00000000 r4 : 00000002 > [ 307.213731] r3 : 00000150 r2 : 0000002c r1 : 00000001 r0 : 800b0193 > [ 307.220423] Flags: Nzcv IRQs off FIQs on Mode SVC_32 ISA Thumb Segment none > [ 307.228007] Control: 50c5387d Table: 9dd34019 DAC: 00000051 > [ 307.233896] Process wpa_supplicant (pid: 875, stack limit = 0xdd8e6218) > [ 307.240675] Stack: (0xdd8e79a0 to 0xdd8e8000) > [ 307.245159] 79a0: 00000150 00000002 00000000 00000054 ddf26de0 bfac8803 ddf26de0 ddf27144 > [ 307.253559] 79c0: dcda6800 00000000 dcda692c bfac8971 00000000 c04fc087 c000a439 dde057c0 > [ 307.261945] 79e0: dc94f900 bfaab2ff bfaab2e9 dc94f900 000b0113 c04fc1d3 ddcc4038 dc94f914 > [ 307.270331] 7a00: dcda6924 dd8e7a14 00000000 c04fc2dd df925d8c dd8e7a14 dd8e7a14 dc8ba606 > [ 307.278715] 7a20: df925d80 dcda6938 00000000 00000000 000f4240 c095df60 c095dfa8 dcda6934 > [ 307.287099] 7a40: 00000018 c0034acf c0b5b098 00000006 c0c29d8c 00000040 dd8e6000 dd8e7b90 > [ 307.295483] 7a60: 00000007 c0034c85 004c4b29 00000000 00000101 dd8e7a68 c0b5b080 c0c40380 > [ 307.303889] 7a80: 0000000a 000006e1 c0b5b140 00400140 c00856ed 200b0113 ffffe000 dddfc2bc > [ 307.312282] 7aa0: 00000000 00000304 dd8e7b90 ddf0e840 0000000f c0034ea7 000001ff c0034f33 > [ 307.320666] 7ac0: 0000001e dddfc000 da84ec40 c0628085 dd8e7ca0 dddfc090 60000013 00000000 > [ 307.329050] 7ae0: da84ec40 dd8e7b90 ddf0e840 00000005 00000000 ddf0e840 0000000f c05f11e5 > [ 307.337437] 7b00: 00000000 00000020 00007ea0 ddf0e840 00000020 c014402d 00000000 00007ea0 > [ 307.351143] 7b20: 00000000 00000000 00000000 dd8e7e50 dd8e7e4c dd8e7e48 dd8e7e40 dd8e7e44 > [ 307.364750] 7b40: dd8e7e48 00000000 00000000 00000000 00000000 00000000 024152c0 dd8e7e24 > [ 307.378341] 7b60: c0b5d930 00000000 dd8e7f74 dd8e7b88 c0b5ba88 dd8e6000 004c4b29 00000000 > [ 307.391976] 7b80: 00000001 3b9aca00 a6ad6574 00000048 00000000 000000db 00000000 dcf56180 > [ 307.405640] 7ba0: 00000000 00000000 00000008 ddf0e840 000000db 00000000 dd8e7b90 c01439a1 > [ 307.419316] 7bc0: dc026784 dc026784 dc026780 ddf4bcc0 000000db 00000000 dd8e7b90 c01439a1 > [ 307.433008] 7be0: dc026204 dc026204 dc026200 ddf4bf00 000000db 00000000 dd8e7b90 c01439a1 > [ 307.446684] 7c00: dc02612c dc02612c dc026128 ddf4bc00 000000db 00000000 dd8e7b90 c01439a1 > [ 307.460325] 7c20: dc026984 dc026984 dc026980 dc060cc0 000000db 00000000 dd8e7b90 c01439a1 > [ 307.473925] 7c40: dc026144 dc026144 dc026140 dc0603c0 000000db 00000000 dd8e7b90 c01439a1 > [ 307.487339] 7c60: ddb1b104 ddb1b104 ddb1b100 dc0609c0 000000db 00000000 dd8e7b90 c01439a1 > [ 307.500597] 7c80: dde03844 dde03844 dde03840 dc060e40 000000db 00000000 dd8e7b90 c01439a1 > [ 307.513712] 7ca0: dde037c4 dde037c4 dde037c0 ddb7b000 dcf0c480 c0627d0b 00000004 00000002 > [ 307.526882] 7cc0: ffffffed dc8ba606 dc138f00 ddb7b000 dcf0c300 dd8e7d10 dc138f00 dcf0c300 > [ 307.539972] 7ce0: 00000000 c06281c9 dd8e7d10 c06e1163 c0b5ba88 c06e1163 bf99f4cc c062a553 > [ 307.553056] 7d00: 00000000 c0c25540 000000cc c00583d7 c0629e85 c0629e4d bf99726c bf9a7980 > [ 307.566185] 7d20: 00000000 dd8e6000 c06ec750 00000000 dcd2e8a0 00000000 00000000 dd8e6000 > [ 307.579343] 7d40: c0b5cb94 c0b5ba88 024200ca dc8ba606 dcdadb00 dc138f00 dcf0c300 c05fb77d > [ 307.592434] 7d60: dd8e7de0 c05fb81f dcf0c300 00000000 dd8e7de0 c00f8b8b dfda1340 dfda1460 > [ 307.605436] 7d80: 00000003 c00f8ccf 00000008 00000000 40000093 c001a411 0009a5fd 9a5fd18f > [ 307.618349] 7da0: dde007bc 00000000 00000000 c00f451f dfd22794 00000000 00000000 dc8ba606 > [ 307.631178] 7dc0: dfd22794 00000001 da8b0960 c00f451f 00000000 00000000 00000000 7f5e0000 > [ 307.643956] 7de0: 0000014f 00000000 0014f000 dc8ba606 00000070 00000004 dd8e7e3c c0b5ba88 > [ 307.656720] 7e00: 0000000f 7fdbf350 7fdbf3d8 dd8e7e3c 7fdbf948 c014434d dd8e7f74 00000051 > [ 307.669494] 7e20: 00000070 dd8e7e3c dd8e7e40 dd8e7e44 dd8e7e48 dd8e7e4c dd8e7e50 00007ea0 > [ 307.682259] 7e40: 00000000 00000000 00000000 00000000 00000000 ddfb0c74 7f5e0000 dde00000 > [ 307.695032] 7e60: ddcaa000 00000000 00000054 00000061 7f5e0000 ffffe000 00000000 00000070 > [ 307.707785] 7e80: dde00780 dc8ba606 00000000 dd8e7fb0 dcf56180 80000007 7f5e07fc ddfb0c40 > [ 307.720566] 7ea0: dcd2e720 ddfb0c78 00000054 c06e349b 00000000 00000000 7f6dcad8 c05f2b6d > [ 307.733379] 7ec0: dd8e7ee0 00000000 00000000 00000000 00000000 000008fc dd8e7f04 c008a4db > [ 307.746185] 7ee0: 04f2e6a2 00000000 a8e0fcc7 ffffffff ffffffff c0143dfb 00000133 0207683c > [ 307.759065] 7f00: 8dbe2200 c0b5ba88 dd8e7f74 3b9a9738 00000004 dd8e7f30 7fdbf948 c0143dfb > [ 307.771961] 7f20: 7f6dcad8 00000004 3b9a9738 c0b5ba88 00000138 02073574 00000004 dc8ba606 > [ 307.784855] 7f40: 0207683c bed1db24 c0b5ba88 0000000f 7fdbf350 7fdbf3d8 7fdbf948 dd8e7f74 > [ 307.797776] 7f60: 7f6dcad8 c0144645 dd8e7f74 00000107 c000eda4 00000138 02073574 00000004 > [ 307.810714] 7f80: 000f4233 dc8ba606 bed1db24 7fdbf298 7f6dcad8 0000008e c000eda4 dd8e6000 > [ 307.823633] 7fa0: 00000000 c000ebe1 bed1db24 7fdbf298 0000000f 7fdbf350 7fdbf3d8 7fdbf948 > [ 307.836538] 7fc0: bed1db24 7fdbf298 7f6dcad8 0000008e 7fdb1568 7fdbf350 7fdbf3d8 7f6dcad8 > [ 307.849434] 7fe0: 00000000 bed1daf0 7f599bf3 b6cdc548 00000030 0000000f ff76fea7 ffff88ef > [ 307.862403] [<c06e2560>] (_raw_spin_lock_irqsave) from [<bfa9b99b>] (rt2x00queue_get_entry+0x1e/0x54 [rt2x00lib]) I have seen a similar crash and fixed it as a part of following commit: 8b4c0009313f3d42e2540e3e1f776097dd0db73d But it would be helpful if you can get paste the entire kernel log. Because in my case, I used to see a USB Disconnect event for the rt2800 driver and the crash was caused due to that. Thanks, Vishal > [ 307.877604] [<bfa9b99b>] (rt2x00queue_get_entry [rt2x00lib]) from [<bfac8803>] (rt2800usb_txstatus_pending+0x1a/0x54 [rt2800usb]) > [ 307.898952] [<bfac8803>] (rt2800usb_txstatus_pending [rt2800usb]) from [<bfac8971>] (rt2800usb_tx_sta_fifo_read_completed+0x78/0xe8 [rt2800usb]) > [ 307.922051] [<bfac8971>] (rt2800usb_tx_sta_fifo_read_completed [rt2800usb]) from [<bfaab2ff>] (rt2x00usb_register_read_async_cb+0x16/0x34 [rt2x00usb]) > [ 307.946065] [<bfaab2ff>] (rt2x00usb_register_read_async_cb [rt2x00usb]) from [<c04fc1d3>] (__usb_hcd_giveback_urb+0x4b/0xdc) > [ 307.962810] [<c04fc1d3>] (__usb_hcd_giveback_urb) from [<c04fc2dd>] (usb_giveback_urb_bh+0x79/0xb8) > [ 307.977423] [<c04fc2dd>] (usb_giveback_urb_bh) from [<c0034acf>] (__tasklet_action+0x5b/0xe8) > [ 307.991555] [<c0034acf>] (__tasklet_action) from [<c0034c85>] (__do_softirq+0x85/0x234) > [ 308.005182] [<c0034c85>] (__do_softirq) from [<c0034ea7>] (do_softirq.part.6+0x33/0x38) > [ 308.018813] [<c0034ea7>] (do_softirq.part.6) from [<c0034f33>] (__local_bh_enable_ip+0x87/0x90) > [ 308.033175] [<c0034f33>] (__local_bh_enable_ip) from [<c0628085>] (netlink_poll+0xf1/0x138) > [ 308.047248] [<c0628085>] (netlink_poll) from [<c05f11e5>] (sock_poll+0x59/0xb0) > [ 308.060337] [<c05f11e5>] (sock_poll) from [<c014402d>] (do_select+0x221/0x44c) > [ 308.073395] [<c014402d>] (do_select) from [<c014434d>] (core_sys_select+0xf5/0x338) > [ 308.086929] [<c014434d>] (core_sys_select) from [<c0144645>] (SyS_select+0xb5/0xf4) > [ 308.100533] [<c0144645>] (SyS_select) from [<c000ebe1>] (ret_fast_syscall+0x1/0x52) > [ 308.114190] Code: 8000 b672 f892 f000 (e852) 3f00 > [ 308.124989] ---[ end trace 727b461c8c30b5e7 ]--- > [ 308.135586] Kernel panic - not syncing: Fatal exception in interrupt > [ 308.147983] ---[ end Kernel panic - not syncing: Fatal exception in interrupt > > -- > Craig McQueen > > -- > To unsubscribe from this list: send the line "unsubscribe linux-wireless" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
