I'm building an AP using the latest CW code with a 2.6.27.8 kernel, and a Linsys/Cisco WMP660N PCI adapter. I'm having a problem with the boot-up sequence. Sometimes, when I start hostapd, I get this error in the system log:
kernel: phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy, aborting.
and hostapd craps out. If I try to run hostapd again, the kernel dies. (Crash details attached.)
(Other times, the boot and startup sequence works just fine.)
So I'd like to know if there is a way (in user space) for me to poll whether I'm going to get that error (which I presume means something in the card is not quite ready yet), and wait to start hostapd after that condition clears.
Note that I am doing an "iw wlan0 scan" before this, to see if I need to jump to a different channel, so I'm already talking to the card successfully. I presume that means the firmware is already loaded, so I'm not really sure what is "busy".
Please reply directly, as I am not subscribed to this list.
Thanks in advance!!!!
-Joshua
BUG: unable to handle kernel NULL pointer dereference at 00000010
IP: [<f8d2d901>] :rt2800pci:rt2800pci_clear_entry+0x1/0x40
*pde = 00000000
Oops: 0000 [#1] SMP
Modules linked in: vga2usb usbvideo videodev v4l1_compat snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss pcmcia agpgart ppdev lp parport_pc parport pcspkr psmouse arc4 ecb rt2800pci rt2800lib crc_ccitt rt2x00pci rt2x00lib led_class compat_firmware_class mac80211 cfg80211 rfkill_backport ftdi_sio compat usbserial pcmcia_core eeprom_93cx6 sg snd_hda_intel e1000e snd_pcm snd_timer snd_page_alloc snd_hwdep snd soundcore evdev fuse aufs squashfs sqlzma unlzma [last unloaded: rsrc_nonstatic]
Pid: 5995, comm: hostapd Not tainted (2.6.27.8 #1)
EIP: 0060:[<f8d2d901>] EFLAGS: 00210246 CPU: 3
EIP is at rt2800pci_clear_entry+0x1/0x40 [rt2800pci]
EAX: 00000000 EBX: f698863c ECX: 00200296 EDX: f8d2dee0
ESI: f6988600 EDI: f5b6f000 EBP: 00000000 ESP: f6d75e4c
DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process hostapd (pid: 5995, ti=f6d74000 task=f6ce2300 task.ti=f6d74000)
Stack: f698863c fa00eaec 00000000 f5b6f000 00000000 f7b67000 f5b6e280 fa00c629
f5b6f000 00000000 fa00ca3d f7b67480 00000001 fa177d4c 01b6e890 f7b67000
00000000 f7b67000 00000001 00001003 00001002 c066c366 f7b67000 c0668ad0
Call Trace:
[<fa00eaec>] rt2x00queue_init_queues+0x5c/0x90 [rt2x00lib]
[<fa00c629>] rt2x00lib_enable_radio+0x29/0xa0 [rt2x00lib]
[<fa00ca3d>] rt2x00lib_start+0x5d/0xd0 [rt2x00lib]
[<fa177d4c>] ieee80211_do_open+0x21c/0x510 [mac80211]
[<c066c366>] dev_open+0x56/0xb0
[<c0668ad0>] dev_set_rx_mode+0x20/0x40
[<c066a67f>] dev_change_flags+0x7f/0x190
[<c06b1495>] devinet_ioctl+0x515/0x690
[<c0668d24>] __dev_get_by_name+0x74/0x90
[<c065d3f0>] sock_ioctl+0xd0/0x240
[<c065d320>] sock_ioctl+0x0/0x240
[<c018179b>] vfs_ioctl+0x2b/0x90
[<c0181a5b>] do_vfs_ioctl+0x25b/0x2a0
[<c0181af6>] sys_ioctl+0x56/0x70
[<c0103262>] syscall_call+0x7/0xb
[<c0700000>] add_card+0xad0/0xba0
=======================
Code: 83 78 08 0e 74 14 8b 02 8b 48 04 85 c9 0f 99 c0 0f b6 c0 c3 8d b6 00 00 00 00 8b 02 8b 40 04 85 c0 0f 99 c0 0f b6 c0 c3 66 90 53 <8b> 48 10 8b 58 08 8b 40 04 83 78 08 0e 74 15 8b 11 83 c2 04 8b
EIP: [<f8d2d901>] rt2800pci_clear_entry+0x1/0x40 [rt2800pci] SS:ESP 0068:f6d75e4c
---[ end trace cff9a5c094bb8837 ]---
Attachment:
crashLogs.ZIP
Description: Zip archive
