From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Gleixner <tglx@linutronix.de>
Subject: Re: rt5, sleeping function called from invalid context
Date: Thu, 28 Jul 2011 21:39:43 +0200 (CEST)
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To: Frank Rowand <frank.rowand@am.sony.com>
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On Thu, 28 Jul 2011, Frank Rowand wrote:

> Thomas,
> 
> Here is one of my current BUGs, from rt5 (same panda board, same config):
> 
> 
> BUG: sleeping function called from invalid context at kernel/rtmutex.c:645
> in_atomic(): 0, irqs_disabled(): 128, pid: 599, name: bash
> 2 locks held by bash/599:
>  #0:  (tty_mutex){+.+.+.}, at: [<c02b7600>] tty_open+0x4c/0x4c4
>  #1:  (big_tty_mutex){+.+.+.}, at: [<c048005c>] tty_lock+0x2c/0x54
> irq event stamp: 18015
> hardirqs last  enabled at (18014): [<c047fe68>] _raw_spin_unlock_irqrestore+0x60/0x74
> hardirqs last disabled at (18015): [<c02d4714>] serial_omap_console_write+0x28/0x230
> softirqs last  enabled at (0): [<c009d0d0>] copy_process+0x364/0xf84
> softirqs last disabled at (0): [<  (null)>]   (null)
> [<c00681b8>] (unwind_backtrace+0x0/0xf0) from [<c047f348>] (rt_spin_lock+0x24/0x5c)
> [<c047f348>] (rt_spin_lock+0x24/0x5c) from [<c02d48c0>] (serial_omap_console_write+0x1d4/0x230)
> [<c02d48c0>] (serial_omap_console_write+0x1d4/0x230) from [<c009f154>] (__call_console_drivers+0xcc/0xf4
> )
> [<c009f154>] (__call_console_drivers+0xcc/0xf4) from [<c009f3e4>] (console_unlock+0x158/0x210)
> [<c009f3e4>] (console_unlock+0x158/0x210) from [<c009f724>] (console_device+0x54/0x60)
> [<c009f724>] (console_device+0x54/0x60) from [<c02b796c>] (tty_open+0x3b8/0x4c4)
> [<c02b796c>] (tty_open+0x3b8/0x4c4) from [<c014dac8>] (chrdev_open+0x180/0x260)
> [<c014dac8>] (chrdev_open+0x180/0x260) from [<c0148598>] (__dentry_open+0x1d4/0x348)
> [<c0148598>] (__dentry_open+0x1d4/0x348) from [<c01487d8>] (nameidata_to_filp+0x5c/0x64)
> [<c01487d8>] (nameidata_to_filp+0x5c/0x64) from [<c01568d4>] (do_last+0x180/0x698)
> [<c01568d4>] (do_last+0x180/0x698) from [<c01585d8>] (path_openat+0xb8/0x3f8)
> [<c01585d8>] (path_openat+0xb8/0x3f8) from [<c0158a00>] (do_filp_open+0x30/0x84)
> [<c0158a00>] (do_filp_open+0x30/0x84) from [<c014820c>] (do_sys_open+0xf4/0x188)
> [<c014820c>] (do_sys_open+0xf4/0x188) from [<c0060da0>] (ret_fast_syscall+0x0/0x3c)

https://lkml.org/lkml/2011/7/28/114

Thanks,

	tglx