Messages in this thread Patch in this message | | | Date | Sat, 13 Mar 2010 14:32:13 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH] base firmware: Fix BUG from sysfs attributes change in commit a2db6842873c8e5a70652f278d469128cb52db70 |
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On Sat, 13 Mar 2010, Larry Finger wrote: > > Commit a2db6842873c8e5a70652f278d469128cb52db70 changed the way that > sysfs attributes are handled. With lockdep checking enabled, a firmware > loading request from b43 generates the following BUG: > > BUG: key ffff8800b85f4870 not in .data! > ------------[ cut here ]------------ > WARNING: at kernel/lockdep.c:2706 lockdep_init_map+0x236/0x5d0()
I don't think we can fix these problems this way.
Lookie here:
[torvalds@i5 linux]$ git grep sysfs_create_bin_file | wc 68 319 5999 [torvalds@i5 linux]$ git grep sysfs_bin_attr_init | wc 8 24 522
and you sent in patches to fix _two_ of the remaining 60 cases.
Now, there may be some reason why it's not needed for the others, and those two are special, but I somewhat doubt it.
Eric - that patch of yours is obviously broken. Either I need to revert it, or you need to fix it. Not these kinds of "fix random sysfs_create_bin_file() drivers one by one" things.
Linus
--- > Hardware name: HP Pavilion dv2700 Notebook PC > Pid: 2283, comm: NetworkManager Not tainted 2.6.34-rc1-wl #320 > Call Trace: > [<ffffffff81046068>] warn_slowpath_common+0x78/0xb0 > [<ffffffff810460af>] warn_slowpath_null+0xf/0x20 > [<ffffffff810765e6>] lockdep_init_map+0x236/0x5d0 > [<ffffffff811633aa>] sysfs_add_file_mode+0x6a/0xc0 > [<ffffffff8116340c>] sysfs_add_file+0xc/0x10 > [<ffffffff81165ae1>] sysfs_create_bin_file+0x21/0x30 > [<ffffffff8124f6b7>] _request_firmware+0x267/0x630 > [<ffffffff8124fb0e>] request_firmware+0xe/0x10 > [<ffffffffa04038d2>] b43_do_request_fw+0x92/0x230 [b43] > (rest of dump snipped) > > Fixed by initing the attribute. > > Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> > --- > > Index: wireless-testing/drivers/base/firmware_class.c > =================================================================== > --- wireless-testing.orig/drivers/base/firmware_class.c > +++ wireless-testing/drivers/base/firmware_class.c > @@ -442,6 +442,7 @@ static int fw_setup_device(struct firmwa > fw_priv = dev_get_drvdata(f_dev); > > fw_priv->fw = fw; > + sysfs_bin_attr_init(&fw_priv->attr_data); > retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data); > if (retval) { > dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__); >
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