linux-kernel - Linux 2.6.26.3: parallel port trouble

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Date:	Wed, 3 Sep 2008 12:02:03 -0700 (PDT)
From:	Chris Rankin <rankincj@...oo.com>
To:	linux-kernel@...r.kernel.org
Cc:	tim@...erelk.net
Subject: Linux 2.6.26.3: parallel port trouble

Everyone,

I'm seeing some strange output in the dmesg log with a 2.6.26.3 UP kernel when it prints to an old HP OfficeJet parallel port printer:

ppdev0: registered pardevice
sysctl table check failed: /dev/parport/parport0/devices/ppdev0/timeslice  Sysctl already exists
Pid: 3268, comm: hpijs Not tainted 2.6.26.3 #1
 [<c0129dd8>] set_fail+0x30/0x39
 [<c012a1f2>] sysctl_check_table+0x411/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c011c802>] __register_sysctl_paths+0xa0/0x102
 [<c011c87e>] register_sysctl_paths+0x1a/0x1c
 [<d9955458>] parport_device_proc_register+0xa2/0xbc [parport]
 [<d99537e1>] parport_register_device+0x1f8/0x220 [parport]
 [<d993f2f7>] pp_ioctl+0x11e/0x76e [ppdev]
 [<d993f947>] pp_irq+0x0/0x89 [ppdev]
 [<c0167e85>] vfs_ioctl+0x49/0x5f
 [<c01680d3>] do_vfs_ioctl+0x238/0x24a
 [<c0168111>] sys_ioctl+0x2c/0x43
 [<c0102c36>] syscall_call+0x7/0xb
 =======================
ppdev0: registered pardevice
...
ppdev0: unregistered pardevice
ppdev0: released pardevice because user-space forgot
ppdev0: unregistered pardevice
ppdev0: registered pardevice
sysctl table check failed: /dev/parport/parport0/devices/ppdev0/timeslice  Sysctl already exists
Pid: 6643, comm: hpijs Not tainted 2.6.26.3 #1
 [<c0129dd8>] set_fail+0x30/0x39
 [<c012a1f2>] sysctl_check_table+0x411/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c012a209>] sysctl_check_table+0x428/0x44f
 [<c011c802>] __register_sysctl_paths+0xa0/0x102
 [<c011c87e>] register_sysctl_paths+0x1a/0x1c
 [<d9955458>] parport_device_proc_register+0xa2/0xbc [parport]
 [<d99537e1>] parport_register_device+0x1f8/0x220 [parport]
 [<d993f2f7>] pp_ioctl+0x11e/0x76e [ppdev]
 [<d993f947>] pp_irq+0x0/0x89 [ppdev]
 [<c0167e85>] vfs_ioctl+0x49/0x5f
 [<c01680d3>] do_vfs_ioctl+0x238/0x24a
 [<c0168111>] sys_ioctl+0x2c/0x43
 [<c0102c36>] syscall_call+0x7/0xb
 =======================
ppdev0: registered pardevice
ppdev0: unregistered pardevice
ppdev0: unregistered pardevice

The printer is still printing, so I'm guessing that these warnings aren't too serious - yet. But they worry me.

Cheers,
Chris



      
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