forked from Minki/linux
adeab1afb7
Guido Trentalancia reports: I am trying to use the kiss driver in the Linux kernel that is being shipped with Fedora 10 but unfortunately I get the following oops: mkiss: AX.25 Multikiss, Hans Albas PE1AYX mkiss: ax0: crc mode is auto. ADDRCONF(NETDEV_CHANGE): ax0: link becomes ready ------------[ cut here ]------------ WARNING: at kernel/softirq.c:77 __local_bh_disable+0x2f/0x83() (Not tainted) [...] unloaded: microcode] Pid: 0, comm: swapper Not tainted 2.6.27.25-170.2.72.fc10.i686 #1 [<c042ddfb>] warn_on_slowpath+0x65/0x8b [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38 [<c04228b4>] ? __enqueue_entity+0xe3/0xeb [<c042431e>] ? enqueue_entity+0x203/0x20b [<c0424361>] ? enqueue_task_fair+0x3b/0x3f [<c041f88c>] ? resched_task+0x3a/0x6e [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38 [<c06ab4e2>] ? _spin_lock_bh+0xb/0x16 [<c043255b>] __local_bh_disable+0x2f/0x83 [<c04325ba>] local_bh_disable+0xb/0xd [<c06ab4e2>] _spin_lock_bh+0xb/0x16 [<f8b6f600>] mkiss_receive_buf+0x2fb/0x3a6 [mkiss] [<c0572a30>] flush_to_ldisc+0xf7/0x198 [<c0572b12>] tty_flip_buffer_push+0x41/0x51 [<f89477f2>] ftdi_process_read+0x375/0x4ad [ftdi_sio] [<f8947a5a>] ftdi_read_bulk_callback+0x130/0x138 [ftdi_sio] [<c05d4bec>] usb_hcd_giveback_urb+0x63/0x93 [<c05ea290>] uhci_giveback_urb+0xe5/0x15f [<c05eaabf>] uhci_scan_schedule+0x52e/0x767 [<c05f6288>] ? psmouse_handle_byte+0xc/0xe5 [<c054df78>] ? acpi_ev_gpe_detect+0xd6/0xe1 [<c05ec5b0>] uhci_irq+0x110/0x125 [<c05d4834>] usb_hcd_irq+0x40/0xa3 [<c0465313>] handle_IRQ_event+0x2f/0x64 [<c046642b>] handle_level_irq+0x74/0xbe [<c04663b7>] ? handle_level_irq+0x0/0xbe [<c0406e6e>] do_IRQ+0xc7/0xfe [<c0405668>] common_interrupt+0x28/0x30 [<c056821a>] ? acpi_idle_enter_simple+0x162/0x19d [<c0617f52>] cpuidle_idle_call+0x60/0x92 [<c0403c61>] cpu_idle+0x101/0x134 [<c069b1ba>] rest_init+0x4e/0x50 ======================= ---[ end trace b7cc8076093467ad ]--- ------------[ cut here ]------------ WARNING: at kernel/softirq.c:136 _local_bh_enable_ip+0x3d/0xc4() [...] Pid: 0, comm: swapper Tainted: G W 2.6.27.25-170.2.72.fc10.i686 [<c042ddfb>] warn_on_slowpath+0x65/0x8b [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38 [<c04228b4>] ? __enqueue_entity+0xe3/0xeb [<c042431e>] ? enqueue_entity+0x203/0x20b [<c0424361>] ? enqueue_task_fair+0x3b/0x3f [<c041f88c>] ? resched_task+0x3a/0x6e [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38 [<c06ab4e2>] ? _spin_lock_bh+0xb/0x16 [<f8b6f642>] ? mkiss_receive_buf+0x33d/0x3a6 [mkiss] [<c04325f9>] _local_bh_enable_ip+0x3d/0xc4 [<c0432688>] local_bh_enable_ip+0x8/0xa [<c06ab54d>] _spin_unlock_bh+0x11/0x13 [<f8b6f642>] mkiss_receive_buf+0x33d/0x3a6 [mkiss] [<c0572a30>] flush_to_ldisc+0xf7/0x198 [<c0572b12>] tty_flip_buffer_push+0x41/0x51 [<f89477f2>] ftdi_process_read+0x375/0x4ad [ftdi_sio] [<f8947a5a>] ftdi_read_bulk_callback+0x130/0x138 [ftdi_sio] [<c05d4bec>] usb_hcd_giveback_urb+0x63/0x93 [<c05ea290>] uhci_giveback_urb+0xe5/0x15f [<c05eaabf>] uhci_scan_schedule+0x52e/0x767 [<c05f6288>] ? psmouse_handle_byte+0xc/0xe5 [<c054df78>] ? acpi_ev_gpe_detect+0xd6/0xe1 [<c05ec5b0>] uhci_irq+0x110/0x125 [<c05d4834>] usb_hcd_irq+0x40/0xa3 [<c0465313>] handle_IRQ_event+0x2f/0x64 [<c046642b>] handle_level_irq+0x74/0xbe [<c04663b7>] ? handle_level_irq+0x0/0xbe [<c0406e6e>] do_IRQ+0xc7/0xfe [<c0405668>] common_interrupt+0x28/0x30 [<c056821a>] ? acpi_idle_enter_simple+0x162/0x19d [<c0617f52>] cpuidle_idle_call+0x60/0x92 [<c0403c61>] cpu_idle+0x101/0x134 [<c069b1ba>] rest_init+0x4e/0x50 ======================= ---[ end trace b7cc8076093467ad ]--- mkiss: ax0: Trying crc-smack mkiss: ax0: Trying crc-flexnet The issue was, that the locking code in mkiss was assuming it was only ever being called in process or bh context. Fixed by converting the involved locking code to use irq-safe locks. Review of other networking line disciplines shows that 6pack, both sync and async PPP and STRIP have similar issues. The ppp_async one is the most interesting one as it sorts out half of the issue as far back as 2004 in commit http://git.kernel.org/?p=linux/kernel/git/tglx/history.git;a=commitdiff;h=2996d8deaeddd01820691a872550dc0cfba0c37d Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reported-by: Guido Trentalancia <guido@trentalancia.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| wl3501_cs.c | ||
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| zd1201.c | ||
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