Messages in this thread | | | Date | Sun, 12 Oct 2008 11:17:00 -0700 | From | Greg KH <> | Subject | Re: pktcdvd -> sysfs warning with 2.6.27 |
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On Sun, Oct 12, 2008 at 01:26:25PM +0100, Nix wrote: > At the very end of my startup scripts, I say > > pktsetup cdrw /dev/cdrw > > to get the stuff in /etc/pktcdvd set up right. > > As of 2.6.27 this has started complaining: > > pktcdvd: writer pktcdvd0 mapped to hde > ------------[ cut here ]------------ > WARNING: at fs/sysfs/dir.c:463 sysfs_add_one+0x2f/0x3b() > sysfs: duplicate filename '254:0' can not be created > Modules linked in: > Pid: 1306, comm: pktsetup Not tainted 2.6.27-dirty #1 > [<c011ac1c>] warn_slowpath+0x50/0x71 > [<c0245c17>] ? ida_get_new_above+0xdc/0x17d > [<c0245a8a>] ? idr_get_empty_slot+0x142/0x1f3 > [<c0245c17>] ? ida_get_new_above+0xdc/0x17d > [<c01a1738>] ? sysfs_ilookup_test+0x0/0x16 > [<c01a1919>] ? sysfs_find_dirent+0x1b/0x2c > [<c01a1aba>] sysfs_add_one+0x2f/0x3b > [<c01a26f6>] sysfs_do_create_link+0xb1/0x106 > [<c01a276b>] sysfs_create_link+0xf/0x14 > [<c02749d2>] device_add+0x134/0x455 > [<c0274d0a>] device_register+0x17/0x1a > [<c0274d8d>] device_create_vargs+0x80/0xa3 > [<c0274dd0>] device_create+0x20/0x24 > [<c028208f>] pkt_setup_dev+0x2ed/0x429 > [<c0282251>] pkt_ctl_ioctl+0x86/0x18c > [<c0170c09>] vfs_ioctl+0x55/0x6e > [<c0185801>] ? block_truncate_page+0xa9/0x1e0 > [<c0170e58>] do_vfs_ioctl+0x236/0x249 > [<c0170e9c>] sys_ioctl+0x31/0x4d > [<c0102c8d>] sysenter_do_call+0x12/0x25 > [<c0185801>] ? block_truncate_page+0xa9/0x1e0 > ======================= > ---[ end trace 1cdd10ab78ee5bc6 ]--- > > For the life of me I can't see where pkt_sysfs_dev_new() is being called > more than once: indeed, from the trace above GCC has inlined it into > pkt_setup_dev() as a static function called from only one place...
Perhaps some other kernel code is registering with that same major/minor number, making it already present in sysfs. Where does that sysfs file link to before you load your driver?
thanks,
greg k-h
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