8686 sdio - don't get first interrupt

Wed Apr 6 12:23:23 EDT 2011

It is possible that the SDIO controller is not detecting the interrupts 
properly.  Please make sure that the controller can detect Level 
sensitive interrupts.  Some of the SDIO controllers that we have worked 
on, typically detect falling edge, as opposed to low lever.  If there is 
an SDIO interrupt while it is being enabled, then it will not be 
detected, if the controller is not level sensitive.  In such case, the 
controller typically detects the interrupt, when the next command is 
sent out.  If this is one such controller, you need to check the DAT1 
line before enabling the SDIO interrupt and manually indicate the 
interrupt to MMC stack.

Regards,
Alagu Sankar

On 04/06/2011 05:37 AM, Charlie Hamilton wrote:
> Hi,
>
> I've got a Marvell 8686 with an SDIO interface using a Conexant mmc/sdio
> driver. I can successfully load the firmware. When I send the first
> command to the host, I don't get an interrupt. It times out and resends
> the command, and I immediately get an interrupt. I then read out the
> reply to the first command, and the sequence numbers don't match.
>
> > From this point on, every command times out and resendsreads out a reply
> to with a non-matching sequence number, because there is always a second
> reply because they all timeout.
>
> It might be livable, but the scan command causes the marvell part to
> stop responding entirely, and I suspect it has something to do with the
> fact that we end up issuing every command twice.
>
> Has anyone seen this type of behavior before? I suspect it's a problem
> in how the SDIO driver is initialized, but am hoping someone's been down
> this road before.
>
> What follows is the libertas debug output from the point where the
> firmware is loaded until a few packets have been processed.
>
> Thanks,
> Charlie
>
> =====
>
>
> <7>[   78.120000] libertas enter: lbs_add_card()
> <7>[   78.120000] libertas enter: lbs_init_adapter()
> <7>[   78.120000] libertas enter: lbs_allocate_cmd_buffer()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   78.120000] libertas leave: lbs_allocate_cmd_buffer(), ret 0
> <7>[   78.120000] libertas leave: lbs_init_adapter(), ret 0
> <7>[   78.120000] libertas thread: Starting main thread...
> <7>[   78.120000] libertas leave: lbs_add_card(), priv c08b4300
> <7>[   78.120000] libertas enter: lbs_start_card()
> <7>[   78.120000] libertas enter: lbs_setup_firmware()
> <7>[   78.120000] libertas enter: lbs_update_hw_spec()
> <7>[   78.120000] libertas enter: __lbs_cmd()
> <7>[   78.120000] libertas enter: __lbs_cmd_async()
> <7>[   78.120000] libertas enter: lbs_get_cmd_ctrl_node()
> <7>[   78.120000] libertas leave: lbs_get_cmd_ctrl_node()
> <7>[   78.120000] libertas host: PREP_CMD: command 0x0003
> <7>[   78.120000] libertas enter: lbs_queue_cmd()
> <7>[   78.120000] libertas host: QUEUE_CMD: inserted command 0x0003 into
> cmdpendingq
> <7>[   78.120000] libertas leave: lbs_queue_cmd()
> <7>[   78.120000] libertas leave: __lbs_cmd_async(), ret c2ff5a00
> <7>[   78.120000] libertas enter: lbs_thread()
> <7>[   78.120000] libertas thread: 1: currenttxskb (null), dnld_sent 0
> <7>[   78.120000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   78.120000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   78.120000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   78.120000] libertas enter: lbs_execute_next_command()
> <7>[   78.120000] libertas host: EXEC_NEXT_CMD: sending command 0x0003
> <7>[   78.120000] libertas enter: lbs_submit_command()
> <7>[   78.120000] libertas cmd: DNLD_CMD: command 0x0003, seq 1, size 46
> <4>[   78.120000] libertas DNLD_CMD: 03 00 2e 00 01 00 00 00 00 00 00 00
> 00 00 00 00
> <4>[   78.120000] libertas DNLD_CMD: ff ff ff ff ff ff 00 00 00 00 00 00
> 00 00 00 00
> <4>[   78.130000] libertas DNLD_CMD: 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00
> <7>[   78.140000] libertas enter: if_sdio_host_to_card(type 1, bytes 46)
> <7>[   78.140000] libertas leave: if_sdio_host_to_card(), ret 0
> <7>[   78.140000] libertas leave: lbs_submit_command()
> <7>[   78.140000] libertas leave: lbs_execute_next_command()
> <7>[   78.140000] libertas thread: 1: currenttxskb (null), dnld_sent 2
> <7>[   78.140000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   78.140000] libertas enter: if_sdio_host_to_card_worker()
> <7>[   78.150000] libertas leave: if_sdio_host_to_card_worker()
> <7>[   81.140000] libertas enter (INT): command_timer_fn()
> <6>[   81.140000] libertas: command 0x0003 timed out
> <7>[   81.140000] libertas leave (INT): command_timer_fn()
> <7>[   81.140000] libertas thread: 2: currenttxskb (null), dnld_send 2
> <7>[   81.140000] libertas thread: 3: currenttxskb (null), dnld_sent 2
> <7>[   81.140000] libertas thread: 4: currenttxskb (null), dnld_sent 2
> <6>[   81.140000] libertas: requeueing command 0x0003 due to timeout
> (#1)
> <7>[   81.140000] libertas enter: lbs_execute_next_command()
> <7>[   81.140000] libertas host: EXEC_NEXT_CMD: sending command 0x0003
> <7>[   81.140000] libertas enter: lbs_submit_command()
> <7>[   81.140000] libertas cmd: DNLD_CMD: command 0x0003, seq 1, size 46
> <4>[   81.140000] libertas DNLD_CMD: 03 00 2e 00 01 00 00 00 00 00 00 00
> 00 00 00 00
> <4>[   81.150000] libertas DNLD_CMD: ff ff ff ff ff ff 00 00 00 00 00 00
> 00 00 00 00
> <4>[   81.160000] libertas DNLD_CMD: 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00
> <7>[   81.160000] libertas enter: if_sdio_host_to_card(type 1, bytes 46)
> <7>[   81.160000] libertas leave: if_sdio_host_to_card(), ret 0
> <7>[   81.160000] libertas leave: lbs_submit_command()
> <7>[   81.160000] libertas leave: lbs_execute_next_command()
> <7>[   81.160000] libertas thread: 1: currenttxskb (null), dnld_sent 2
> <7>[   81.160000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   81.160000] libertas enter: if_sdio_host_to_card_worker()
> <7>[   81.160000] libertas leave: if_sdio_host_to_card_worker()
> <7>[   81.160000] libertas enter: if_sdio_interrupt()
> <7>[   81.160000] libertas sdio: interrupt: 0x3
> <7>[   81.160000] libertas enter: lbs_host_to_card_done()
> <7>[   81.160000] libertas leave: lbs_host_to_card_done()
> <7>[   81.160000] libertas enter: if_sdio_card_to_host()
> <7>[   81.160000] libertas sdio: packet of type 1 and size 50 bytes
> <7>[   81.160000] libertas enter: if_sdio_handle_cmd()
> <7>[   81.160000] libertas enter: lbs_notify_command_response()
> <7>[   81.160000] libertas leave: lbs_notify_command_response()
> <7>[   81.160000] libertas leave: if_sdio_handle_cmd(), ret 0
> <7>[   81.160000] libertas leave: if_sdio_card_to_host(), ret 0
> <7>[   81.160000] libertas leave: if_sdio_interrupt(), ret 0
> <7>[   81.160000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   81.160000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   81.160000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   81.160000] libertas enter: lbs_process_command_response()
> <7>[   81.160000] libertas cmd: CMD_RESP: response 0x8003, seq 1, size
> 46
> <4>[   81.160000] libertas CMD_RESP: 03 80 2e 00 01 00 00 00 02 00 12 00
> 08 00 40 00
> <4>[   81.160000] libertas CMD_RESP: 00 1b fb 1a 1c 76 10 00 01 00 03 46
> 09 18 00 00
> <4>[   81.160000] libertas CMD_RESP: 00 00 00 00 00 00 00 00 00 00 03 03
> 00 00
> <6>[   81.160000] libertas: Received result 0 to command 3 after 1
> retries
> <7>[   81.170000] libertas leave: lbs_process_command_response(), ret 0
> <7>[   81.170000] libertas enter: lbs_execute_next_command()
> <7>[   81.170000] libertas leave: lbs_execute_next_command()
> <7>[   81.170000] libertas thread: 1: currenttxskb (null), dnld_sent 0
> <7>[   81.170000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   81.170000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   81.170000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   81.170000] libertas leave: __lbs_cmd(), ret 0
> <6>[   81.170000] libertas: 00:1b:fb:1a:1c:76, fw 9.70.3p24, cap
> 0x00000303
> <7>[   81.170000] libertas cmd: GET_HW_SPEC: hardware interface 0x2,
> hardware spec 0x0012
> <7>[   81.170000] libertas enter: lbs_set_regiontable()
> <7>[   81.170000] libertas enter: lbs_get_region_cfp_table()
> <7>[   81.170000] libertas main: region_cfp_table[i].region=16
> <7>[   81.170000] libertas leave: lbs_get_region_cfp_table()
> <7>[   81.170000] libertas leave: lbs_set_regiontable(), ret 0
> <7>[   81.170000] libertas 11d: BG-band nrcfp 14
> <7>[   81.170000] libertas leave: lbs_update_hw_spec()
> <7>[   81.170000] libertas enter: lbs_get_tx_power()
> <7>[   81.170000] libertas enter: __lbs_cmd()
> <7>[   81.170000] libertas enter: __lbs_cmd_async()
> <7>[   81.170000] libertas enter: lbs_get_cmd_ctrl_node()
> <7>[   81.170000] libertas leave: lbs_get_cmd_ctrl_node()
> <7>[   81.170000] libertas host: PREP_CMD: command 0x001e
> <7>[   81.170000] libertas enter: lbs_queue_cmd()
> <7>[   81.170000] libertas host: QUEUE_CMD: inserted command 0x001e into
> cmdpendingq
> <7>[   81.170000] libertas leave: lbs_queue_cmd()
> <7>[   81.170000] libertas leave: __lbs_cmd_async(), ret c2ff5a24
> <7>[   81.170000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   81.170000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   81.170000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   81.170000] libertas enter: lbs_execute_next_command()
> <7>[   81.170000] libertas host: EXEC_NEXT_CMD: sending command 0x001e
> <7>[   81.170000] libertas enter: lbs_submit_command()
> <7>[   81.170000] libertas cmd: DNLD_CMD: command 0x001e, seq 2, size 14
> <4>[   81.170000] libertas DNLD_CMD: 1e 00 0e 00 02 00 00 00 00 00 00 00
> 00 00
> <7>[   81.180000] libertas enter: if_sdio_host_to_card(type 1, bytes 14)
> <7>[   81.180000] libertas leave: if_sdio_host_to_card(), ret 0
> <7>[   81.180000] libertas leave: lbs_submit_command()
> <7>[   81.180000] libertas leave: lbs_execute_next_command()
> <7>[   81.180000] libertas thread: 1: currenttxskb (null), dnld_sent 2
> <7>[   81.180000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   81.180000] libertas enter: if_sdio_host_to_card_worker()
> <7>[   81.180000] libertas leave: if_sdio_host_to_card_worker()
> <7>[   81.180000] libertas enter: if_sdio_interrupt()
> <7>[   81.180000] libertas sdio: interrupt: 0x3
> <7>[   81.180000] libertas enter: lbs_host_to_card_done()
> <7>[   81.180000] libertas leave: lbs_host_to_card_done()
> <7>[   81.180000] libertas enter: if_sdio_card_to_host()
> <7>[   81.180000] libertas sdio: packet of type 1 and size 50 bytes
> <7>[   81.180000] libertas enter: if_sdio_handle_cmd()
> <7>[   81.180000] libertas enter: lbs_notify_command_response()
> <7>[   81.180000] libertas leave: lbs_notify_command_response()
> <7>[   81.180000] libertas leave: if_sdio_handle_cmd(), ret 0
> <7>[   81.180000] libertas leave: if_sdio_card_to_host(), ret 0
> <7>[   81.180000] libertas leave: if_sdio_interrupt(), ret 0
> <7>[   81.180000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   81.180000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   81.180000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   81.180000] libertas enter: lbs_process_command_response()
> <7>[   81.180000] libertas cmd: CMD_RESP: response 0x8003, seq 1, size
> 46
> <4>[   81.180000] libertas CMD_RESP: 03 80 2e 00 01 00 00 00 02 00 12 00
> 08 00 40 00
> <4>[   81.180000] libertas CMD_RESP: 00 1b fb 1a 1c 76 10 00 01 00 03 46
> 09 18 00 00
> <4>[   81.180000] libertas CMD_RESP: 00 00 00 00 00 00 00 00 00 00 03 03
> 00 00
> <6>[   81.180000] libertas: Received CMD_RESP with invalid sequence 1
> (expected 2)
> <7>[   81.190000] libertas leave: lbs_process_command_response(), ret -1
> <7>[   81.190000] libertas thread: 1: currenttxskb (null), dnld_sent 0
> <7>[   81.190000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   84.180000] libertas enter (INT): command_timer_fn()
> <6>[   84.180000] libertas: command 0x001e timed out
> <7>[   84.180000] libertas leave (INT): command_timer_fn()
> <7>[   84.180000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   84.180000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   84.180000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <6>[   84.180000] libertas: requeueing command 0x001e due to timeout
> (#1)
> <7>[   84.180000] libertas enter: lbs_execute_next_command()
> <7>[   84.180000] libertas host: EXEC_NEXT_CMD: sending command 0x001e
> <7>[   84.180000] libertas enter: lbs_submit_command()
> <7>[   84.180000] libertas cmd: DNLD_CMD: command 0x001e, seq 2, size 14
> <4>[   84.180000] libertas DNLD_CMD: 1e 00 0e 00 02 00 00 00 00 00 00 00
> 00 00
> <7>[   84.190000] libertas enter: if_sdio_host_to_card(type 1, bytes 14)
> <7>[   84.190000] libertas leave: if_sdio_host_to_card(), ret 0
> <7>[   84.190000] libertas leave: lbs_submit_command()
> <7>[   84.190000] libertas leave: lbs_execute_next_command()
> <7>[   84.190000] libertas thread: 1: currenttxskb (null), dnld_sent 2
> <7>[   84.190000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   84.190000] libertas enter: if_sdio_host_to_card_worker()
> <7>[   84.190000] libertas leave: if_sdio_host_to_card_worker()
> <7>[   84.190000] libertas enter: if_sdio_interrupt()
> <7>[   84.190000] libertas sdio: interrupt: 0x3
> <7>[   84.190000] libertas enter: lbs_host_to_card_done()
> <7>[   84.190000] libertas leave: lbs_host_to_card_done()
> <7>[   84.190000] libertas enter: if_sdio_card_to_host()
> <7>[   84.190000] libertas sdio: packet of type 1 and size 18 bytes
> <7>[   84.190000] libertas enter: if_sdio_handle_cmd()
> <7>[   84.190000] libertas enter: lbs_notify_command_response()
> <7>[   84.190000] libertas leave: lbs_notify_command_response()
> <7>[   84.190000] libertas leave: if_sdio_handle_cmd(), ret 0
> <7>[   84.190000] libertas leave: if_sdio_card_to_host(), ret 0
> <7>[   84.190000] libertas leave: if_sdio_interrupt(), ret 0
> <7>[   84.190000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   84.190000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   84.190000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   84.190000] libertas enter: lbs_process_command_response()
> <7>[   84.190000] libertas cmd: CMD_RESP: response 0x801e, seq 2, size
> 14
> <4>[   84.190000] libertas CMD_RESP: 1e 80 0e 00 02 00 00 00 00 00 12 00
> 14 00
> <6>[   84.190000] libertas: Received result 0 to command 1e after 1
> retries
> <7>[   84.200000] libertas leave: lbs_process_command_response(), ret 0
> <7>[   84.200000] libertas enter: lbs_execute_next_command()
> <7>[   84.200000] libertas leave: lbs_execute_next_command()
> <7>[   84.200000] libertas thread: 1: currenttxskb (null), dnld_sent 0
> <7>[   84.200000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   84.200000] libertas enter: __lbs_cleanup_and_insert_cmd()
> <7>[   84.200000] libertas leave: __lbs_cleanup_and_insert_cmd()
> <7>[   84.200000] libertas leave: __lbs_cmd(), ret 0
> <7>[   84.200000] libertas leave: lbs_get_tx_power()
> <7>[   84.200000] libertas enter: lbs_set_mac_control()
> <7>[   84.200000] libertas enter: lbs_cmd_async()
> <7>[   84.200000] libertas enter: __lbs_cmd_async()
> <7>[   84.200000] libertas enter: lbs_get_cmd_ctrl_node()
> <7>[   84.200000] libertas leave: lbs_get_cmd_ctrl_node()
> <7>[   84.200000] libertas host: PREP_CMD: command 0x0028
> <7>[   84.200000] libertas enter: lbs_queue_cmd()
> <7>[   84.200000] libertas host: QUEUE_CMD: inserted command 0x0028 into
> cmdpendingq
> <7>[   84.200000] libertas leave: lbs_queue_cmd()
> <7>[   84.200000] libertas leave: __lbs_cmd_async(), ret c2ff5a48
> <7>[   84.200000] libertas leave: lbs_cmd_async()
> <7>[   84.200000] libertas leave: lbs_set_mac_control()
> <7>[   84.200000] libertas leave: lbs_setup_firmware(), ret 0
> <7>[   84.220000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   84.220000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   84.220000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   84.220000] libertas enter: lbs_execute_next_command()
> <7>[   84.220000] libertas host: EXEC_NEXT_CMD: sending command 0x0028
> <7>[   84.220000] libertas enter: lbs_submit_command()
> <7>[   84.220000] libertas cmd: DNLD_CMD: command 0x0028, seq 3, size 12
> <4>[   84.220000] libertas DNLD_CMD: 28 00 0c 00 03 00 00 00 03 00 00
> 00
> <7>[   84.220000] libertas enter: if_sdio_host_to_card(type 1, bytes 12)
> <7>[   84.220000] libertas leave: if_sdio_host_to_card(), ret 0
> <7>[   84.220000] libertas leave: lbs_submit_command()
> <7>[   84.220000] libertas leave: lbs_execute_next_command()
> <7>[   84.220000] libertas thread: 1: currenttxskb (null), dnld_sent 2
> <7>[   84.220000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   84.220000] libertas enter: if_sdio_host_to_card_worker()
> <7>[   84.220000] libertas leave: if_sdio_host_to_card_worker()
> <7>[   84.220000] libertas enter: if_sdio_interrupt()
> <7>[   84.220000] libertas sdio: interrupt: 0x3
> <7>[   84.220000] libertas enter: lbs_host_to_card_done()
> <7>[   84.220000] libertas leave: lbs_host_to_card_done()
> <7>[   84.220000] libertas enter: if_sdio_card_to_host()
> <7>[   84.220000] libertas sdio: packet of type 1 and size 18 bytes
> <7>[   84.220000] libertas enter: if_sdio_handle_cmd()
> <7>[   84.220000] libertas enter: lbs_notify_command_response()
> <7>[   84.220000] libertas leave: lbs_notify_command_response()
> <7>[   84.220000] libertas leave: if_sdio_handle_cmd(), ret 0
> <7>[   84.220000] libertas leave: if_sdio_card_to_host(), ret 0
> <7>[   84.220000] libertas leave: if_sdio_interrupt(), ret 0
> <7>[   84.220000] libertas thread: 2: currenttxskb (null), dnld_send 0
> <7>[   84.220000] libertas thread: 3: currenttxskb (null), dnld_sent 0
> <7>[   84.220000] libertas thread: 4: currenttxskb (null), dnld_sent 0
> <7>[   84.220000] libertas enter: lbs_process_command_response()
> <7>[   84.220000] libertas cmd: CMD_RESP: response 0x801e, seq 2, size
> 14
> <4>[   84.220000] libertas CMD_RESP: 1e 80 0e 00 02 00 00 00 00 00 12 00
> 14 00
> <6>[   84.220000] libertas: Received CMD_RESP with invalid sequence 2
> (expected 3)
> <7>[   84.230000] libertas leave: lbs_process_command_response(), ret -1
> <7>[   84.230000] libertas thread: 1: currenttxskb (null), dnld_sent 0
> <7>[   84.230000] libertas thread: sleeping, connect_status 1, psmode 0,
> psstate 0
> <7>[   84.230000] libertas enter: lbs_update_channel()
> <7>[   84.230000] libertas enter: lbs_get_channel()
> <7>[   84.230000] libertas enter: __lbs_cmd()
> <7>[   84.230000] libertas enter: __lbs_cmd_async()
> <7>[   84.230000] libertas enter: lbs_get_cmd_ctrl_node()
> <7>[   84.230000] libertas leave: lbs_get_cmd_ctrl_node()
>
>
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