Re: [PATCH 4/5] ACPI / PM: Make suspend_nvs_save() useacpi_os_map_memory()

From: Len Brown
Date: Fri Jan 07 2011 - 00:53:34 EST

my arrandale laptop took multiple OOPS on resume after this patch.

...
[ 62.718661] PM: resume of devices complete after 515.721 msecs
[ 62.719761] PM: Finishing wakeup.
[ 62.719764] Restarting tasks ... done.
[ 62.721490] video LNXVIDEO:00: Restoring backlight state
[ 62.721681] BUG: unable to handle kernel paging request at
ffffc90000024320
[ 62.723443] IP: [<ffffffff81233e0e>]
acpi_ex_system_memory_space_handler+0x1b2/0x22a
[ 62.725357] PGD 7481c067 PUD 7481d067 PMD 7481e067 PTE 0
[ 62.726818] Oops: 0000 [#1] SMP
[ 62.727683] last sysfs file:
/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/PNP0C0A:00/power_supply/BAT0/charge_full
[ 62.730167] CPU 2
[ 62.730649] Modules linked in: fbcon font bitblit softcursor
acpi_cpufreq mperf snd_hda_codec_realtek i915 snd_hda_intel snd_hda_codec
drm_kms_helper snd_seq snd_seq_device snd_pcm drm atl1e i2c_algo_bit
snd_timer ehci_hcd cfbcopyarea cfbimgblt cfbfillrect snd_page_alloc wmi
rtc_cmos classmate_laptop video ac [last unloaded: scsi_wait_scan]
[ 62.739301]
[ 62.739670] Pid: 2589, comm: bash Not tainted
2.6.37-00004-gb4a017b-dirty #89 To be filled by O.E.M./Spring Peak
[ 62.742119] RIP: 0010:[<ffffffff81233e0e>] [<ffffffff81233e0e>]
acpi_ex_system_memory_space_handler+0x1b2/0x22a
[ 62.744626] RSP: 0018:ffff8800681ef638 EFLAGS: 00010246
[ 62.745910] RAX: 000000000000000c RBX: ffff8800736d4718 RCX:
ffffffff81473f00
[ 62.747629] RDX: ffffffff81473f60 RSI: 00000000000000c7 RDI:
0000000000000004
[ 62.749341] RBP: ffff8800681ef698 R08: 0000000000000080 R09:
ffffffff815f4847
[ 62.751047] R10: ffff8800748ac928 R11: 000000000000002d R12:
ffffc90000024320
[ 62.752759] R13: ffff8800681ef8a0 R14: 0000000000000000 R15:
0000000000000008
[ 62.754472] FS: 00007f827dae5700(0000) GS:ffff880077300000(0000)
knlGS:0000000000000000
[ 62.756412] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 62.757792] CR2: ffffc90000024320 CR3: 00000000742ec000 CR4:
00000000000006e0
[ 62.759501] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 62.761210] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 62.762924] Process bash (pid: 2589, threadinfo ffff8800681ee000, task
ffff8800673ce550)
[ 62.764861] Stack:
[ 62.765345] ffff880000000008 0000000000000000 0000000000000000
0000000077611320
[ 62.767293] ffff8800681ef6c8 00000000812311d3 ffffffff00000000
ffff8800748aaf78
[ 62.769237] ffff8800748d19d8 0000000000000308 ffff8800748aaf18
ffffffff81233c5c
[ 62.771184] Call Trace:
[ 62.771779] [<ffffffff81233c5c>] ?
acpi_ex_system_memory_space_handler+0x0/0x22a
[ 62.773577] [<ffffffff8122b012>]
acpi_ev_address_space_dispatch+0x1d2/0x221
[ 62.775270] [<ffffffff81233c5c>] ?
acpi_ex_system_memory_space_handler+0x0/0x22a
[ 62.777068] [<ffffffff81231508>] ?
acpi_ex_write_with_update_rule+0x12c/0x13c
[ 62.778802] [<ffffffff81230c8f>] acpi_ex_access_region+0x28b/0x316
[ 62.780309] [<ffffffff8123101d>] acpi_ex_field_datum_io+0xfa/0x2bd
[ 62.781817] [<ffffffff810bc21f>] ? kmem_cache_alloc+0xb3/0x139
[ 62.783240] [<ffffffff812312b0>] acpi_ex_extract_from_field+0xd0/0x1fc
[ 62.784829] [<ffffffff8122f3a0>]
acpi_ex_read_data_from_field+0x1b8/0x1ed
[ 62.786483] [<ffffffff81235b33>]
acpi_ex_resolve_node_to_value+0x223/0x2b4
[ 62.788155] [<ffffffff8122a3dd>] ? acpi_ds_obj_stack_push+0xae/0xb9
[ 62.789679] [<ffffffff81230081>] acpi_ex_resolve_to_value+0x275/0x2ba
[ 62.791247] [<ffffffff81228ff7>] acpi_ds_evaluate_name_path+0x7b/0xf8
[ 62.792816] [<ffffffff8123d7e6>] ?
acpi_ps_get_next_namepath+0x73/0x24a
[ 62.794423] [<ffffffff81227137>] acpi_ds_exec_end_op+0x9b/0x578
[ 62.795866] [<ffffffff8123ef2b>] acpi_ps_parse_loop+0x88a/0xa53
[ 62.797308] [<ffffffff81227fc3>] ?
acpi_ds_call_control_method+0x207/0x254
[ 62.798979] [<ffffffff8123e110>] acpi_ps_parse_aml+0x104/0x3c4
[ 62.800401] [<ffffffff8123f8bc>] acpi_ps_execute_method+0x20f/0x2f3
[ 62.862303] [<ffffffff8123981f>] acpi_ns_evaluate+0x18b/0x2d2
[ 62.923160] [<ffffffff812390d4>] acpi_evaluate_object+0x1fc/0x33e
[ 62.983240] [<ffffffff811efda1>] ? vsnprintf+0x83/0x44c
[ 63.043088] [<ffffffffa0006977>]
acpi_video_device_lcd_set_level+0x53/0xe2 [video]
[ 63.102572] [<ffffffffa0006b03>] acpi_video_set_brightness+0x2d/0x31
[video]
[ 63.160697] [<ffffffffa0006b6a>] acpi_video_resume+0x63/0x79 [video]
[ 63.216439] [<ffffffff8142943c>] notifier_call_chain+0x32/0x5e
[ 63.269749] [<ffffffff81056dd1>]
__blocking_notifier_call_chain+0x46/0x5b
[ 63.321147] [<ffffffff81056df5>] blocking_notifier_call_chain+0xf/0x11
[ 63.373135] [<ffffffff810692e7>] pm_notifier_call_chain+0x15/0x2e
[ 63.424093] [<ffffffff81069aea>] enter_state+0xfd/0x129
[ 63.473546] [<ffffffff81069202>] state_store+0xa9/0xc6
[ 63.521483] [<ffffffff811e9a9b>] kobj_attr_store+0x17/0x19
[ 63.568993] [<ffffffff8110c02d>] sysfs_write_file+0x10f/0x14b
[ 63.616221] [<ffffffff810bf4b3>] vfs_write+0xb0/0x12f
[ 63.663246] [<ffffffff810bf70f>] sys_write+0x45/0x6c
[ 63.709920] [<ffffffff8100203b>] system_call_fastpath+0x16/0x1b

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