2.6.19-rc6: oops on resume when plugged to AC on suspend

[Martin Lorenz <martin@lorenz.eu.org>]

Got it the second time now, so it's time to report:

When I suspen while plugged to AC and resume unplugged I get the following
OOPS:

[152108.954000] BUG: unable to handle kernel paging request at virtual
address 7c880000
[152108.954000]  printing eip:
[152108.954000] c0182b3a
[152108.954000] *pde = 00000000
[152108.954000] Oops: 0000 [#1]
[152108.954000] SMP
[152108.954000] Modules linked in: tun ppp_deflate zlib_deflate zlib_inflate
bsd_comp ppp_async ppp_generic slhc ip_gre nls_iso8859_1 nls_cp437 vfat fat
usb_storage usbhid snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss
snd_pcm snd_timer snd soundcore snd_page_alloc vmnet(P) vmmon(P) i915
binfmt_misc nfs nfsd exportfs lockd nfs_acl sunrpc cpufreq_ondemand
container video thermal i2c_ec fan dock button battery ac mmc_block
speedstep_centrino freq_table processor ibm_acpi sbp2 nvram eth1394
irtty_sir sir_dev pcmcia sdhci mmc_core generic nsc_ircc psmouse irda
ohci1394 ieee1394 ehci_hcd ide_core yenta_socket rsrc_nonstatic pcmcia_core
firmware_class uhci_hcd serio_raw usbcore evdev pcspkr crc_ccitt
[152108.954000] CPU:    1
[152108.954000] EIP:    0060:[<c0182b3a>]    Tainted: P      VLI
[152108.954000] EFLAGS: 00010212
(2.6.19-rc6+ieee80211-ipw3945-ch-46.6+1004-g8cdd79c8-dirty #1)
[152108.955000] EIP is at inotify_inode_queue_event+0x4f/0xd0
[152108.955000] eax: cffd21ec   ebx: cffd20d0   ecx: 00000000   edx:
0000000a
[152108.955000] esi: 7c87fff8   edi: e212e090   ebp: f7f19a00   esp:
ef941d9c
[152108.955000] ds: 007b   es: 007b   ss: 0068
[152108.955000] Process mount (pid: 10404, ti=ef940000 task=f1360030
task.ti=ef940000)
[152108.955000] Stack: 00000000 d7d9d090 f7f19a00 00000000 00000000 00000000
00000400 cffd21ec
[152108.955000]        c01037f3 cffd21e4 e212e090 cffd20d0 e212e090 f7f19a00
c016e96a 00000000
[152108.955000]        00000000 e212e090 e212e1c0 c016f585 e212e0b8 e212e1c0
c016f8e0 fffffff3
[152108.955000] Call Trace:
[152108.955000]  [<c016e96a>] dentry_iput+0x57/0x8f
[152108.955000]  [<c016f585>] prune_one_dentry+0x53/0x74
[152108.955000]  [<c016f8e0>] shrink_dcache_sb+0x8f/0xb3
[152108.955000]  [<c0161fbb>] do_remount_sb+0x40/0x120
[152108.955000]  [<c0173549>] do_mount+0x1b0/0x66c
[152108.955000]  [<c0173a7c>] sys_mount+0x77/0xb3
[152108.955000]  [<c0102ddb>] syscall_call+0x7/0xb
[152108.955000] DWARF2 unwinder stuck at syscall_call+0x7/0xb
[152108.955000]
[152108.955000] Leftover inexact backtrace:
[152108.955000]
[152108.955000]  =======================
[152108.955000] Code: 01 00 00 89 44 24 24 39 83 14 01 00 00 0f 84 91 00 00
00 8d 83 1c 01 00 00 89 44 24 1c e8 f1 26 16 00 8b b3 14 01 00 00 83 ee 08
<8b> 6e 08 eb 58 8b 7e 20 85 7c 24 18 74 4a 8b 5e 14 8d 43 14 89
[152108.955000] EIP: [<c0182b3a>] inotify_inode_queue_event+0x4f/0xd0 SS:ESP
0068:ef941d9c
[152108.955000]


after that I can no longer access the HD.
not even with SysRq keys

details are at 
http://www.lorenz.eu.org/~mlo/kernel/?C=M;O=D

gruss
  mlo
--
Dipl.-Ing. Martin Lorenz

            They that can give up essential liberty 
	    to obtain a little temporary safety 
	    deserve neither liberty nor safety.
                                   Benjamin Franklin

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