On 03/06/2012 11:09 AM, Vasanthakumar Thiagarajan wrote:
> "ath6kl: Defer wiphy and netdev registration till the end of ath6kl_core_init()"
> causes kernel panic by accessing the unallocated debug resources during
> boot time. To fix this, split the debug initialization funtion into two,
> one initializes the debug resource and the other takes care of debugfs
> initialization. When this issue shows up the kernel crash dump would
> look like
>
> ath6kl_debug_fwlog_event+0x9c/0x10a
> [<c10666c9>] register_lock_class+0x57/0x288
> [<c1065cd3>] ? trace_hardirqs_on+0xb/0xd
> [<f801f4c9>] ? ath6kl_debug_fwlog_event+0x9c/0x10a
> [<c1066a8a>] __lock_acquire+0x96/0xbe5
> [<c106007b>] ? alarmtimer_suspend+0x80/0x127
> [<c10258da>] ? vprintk+0x394/0x3b1
> [<f801f4c9>] ? ath6kl_debug_fwlog_event+0x9c/0x10a
> [<c10676b3>] lock_acquire+0xda/0xf9
> [<f801f4c9>] ? ath6kl_debug_fwlog_event+0x9c/0x10a
> [<c1532ce3>] _raw_spin_lock+0x28/0x58
> [<f801f4c9>] ? ath6kl_debug_fwlog_event+0x9c/0x10a
> [<f801f4c9>] ath6kl_debug_fwlog_event+0x9c/0x10a
> [<f80310a4>] ath6kl_wmi_control_rx+0x69d/0xb50 [ath6kl_core]
> [<f802d2e1>] ? ath6kl_rx+0x3c/0x839 [ath6kl_core]
> [<f802d35d>] ath6kl_rx+0xb8/0x839 [ath6kl_core]
> [<c104b81e>] ? local_clock+0x2d/0x4e
> [<c102a0af>] ? _local_bh_enable_ip+0x94/0x98
> [<f802bfc0>] ? ath6kl_alloc_amsdu_rxbuf+0xb7/0xb7
> [<f8023b28>] ath6kl_htc_rxmsg_pending_handler+0x891/0x988 [ath6kl_core]
> [<f802bf00>] ? ath6kl_refill_amsdu_rxbufs+0x89/0x92
> [<f802d2a5>] ? aggr_timeout+0xed/0xed [ath6kl_core]
> [<f802bfc0>] ? ath6kl_alloc_amsdu_rxbuf+0xb7/0xb7
> [<f802c420>] ? ath6kl_tx_complete+0x376/0x376 [ath6kl_core]
> [<f8020e92>] ath6kl_hif_intr_bh_handler+0xf7/0x33e
> [<c138ab00>] ? mmc_host_disable+0x15/0x3a
> [<f8123b5c>] ath6kl_sdio_irq_handler+0x3c/0x90 [ath6kl_sdio]
> [<c1392f56>] sdio_irq_thread+0xb6/0x29c
> [<c1392ea0>] ? sdio_claim_irq+0x1cb/0x1cb
> [<c103d4c0>] kthread+0x67/0x6c
> [<c103d459>] ? __init_kthread_worker+0x42/0x42
> [<c153903a>] kernel_thread_helper+0x6/0xd
> BUG: unable to handle kernel NULL pointer dereference at
> EIP: [<f801f4d4>] ath6kl_debug_fwlog_event+0xa7/0x10a
>
> Reported-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@xxxxxxxxxxxxxxxx>
Thanks, applied with these changes:
kvalo: rename new function to ath6kl_debug_init_fs() and add a comment
why it's needed
Kalle
--
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
