forked from luck/tmp_suning_uos_patched
iwlwifi: save PCI state before suspend, restore after resume
This is the right thing to do and fixes the following warning: [ 115.012278] ------------[ cut here ]------------ [ 115.012281] WARNING: at drivers/pci/pci-driver.c:370 pci_legacy_suspend+0x85/0xc2() [ 115.012285] Hardware name: Latitude D630 [ 115.012301] PCI PM: Device state not saved by iwl3945_pci_suspend+0x0/0x4c [iwl3945] [ 115.012304] Modules linked in: fuse nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 acpi_cpufreq kvm_intel kvm snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep arc4 snd_seq_device snd_pcm_oss snd_mixer_oss ecb snd_pcm cryptomgr aead snd_timer crypto_blkcipher snd snd_page_alloc ohci1394 crypto_hash crypto_algapi ch341 ieee1394 usbserial thermal iwl3945 mac80211 led_class lib80211 tg3 processor i2c_i801 i2c_core sg cfg80211 libphy usbhid battery ac button sr_mod cdrom evdev dcdbas ata_generic ata_piix libata sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd usbcore [last unloaded: microcode] [ 115.012374] Pid: 4163, comm: pm-suspend Not tainted 2.6.29-rc3-00227-gf1dd849-dirty #67 [ 115.012377] Call Trace: [ 115.012382] [<ffffffff8023d04d>] warn_slowpath+0xb1/0xed [ 115.012387] [<ffffffff80450b5e>] ? _spin_unlock_irqrestore+0x5c/0x78 [ 115.012390] [<ffffffff80254f08>] ? up+0x34/0x39 [ 115.012394] [<ffffffff80362319>] ? acpi_ut_release_mutex+0x5d/0x61 [ 115.012397] [<ffffffff803584b2>] ? acpi_get_data+0x5e/0x70 [ 115.012400] [<ffffffff80363dd9>] ? acpi_bus_get_device+0x25/0x39 [ 115.012403] [<ffffffff80363e98>] ? acpi_bus_power_manageable+0x11/0x29 [ 115.012406] [<ffffffff803462f7>] ? acpi_pci_power_manageable+0x17/0x19 [ 115.012410] [<ffffffff8033ddfd>] ? pci_set_power_state+0xcc/0x101 [ 115.012418] [<ffffffffa01f28e9>] ? iwl3945_pci_suspend+0x0/0x4c [iwl3945] [ 115.012422] [<ffffffff803401e6>] pci_legacy_suspend+0x85/0xc2 [ 115.012425] [<ffffffff80340316>] pci_pm_suspend+0x34/0x86 [ 115.012429] [<ffffffff8039d7ce>] pm_op+0x52/0xe5 [ 115.012432] [<ffffffff8039dd78>] device_suspend+0x32a/0x451 [ 115.012436] [<ffffffff80269ec2>] suspend_devices_and_enter+0x3e/0x13a [ 115.012439] [<ffffffff8026a128>] enter_state+0x110/0x164 [ 115.012442] [<ffffffff8026a233>] state_store+0xb7/0xd7 [ 115.012446] [<ffffffff8032f95f>] kobj_attr_store+0x17/0x19 [ 115.012449] [<ffffffff80307d64>] sysfs_write_file+0xe4/0x119 [ 115.012453] [<ffffffff802baa7a>] vfs_write+0xae/0x137 [ 115.012456] [<ffffffff802babc7>] sys_write+0x47/0x70 [ 115.012459] [<ffffffff8020b73a>] system_call_fastpath+0x16/0x1b [ 115.012467] ---[ end trace 829828966f6f24dc ]--- Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Tested-by: Ming Lei <tom.leiming@gmail.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -4042,6 +4042,7 @@ static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
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priv->is_open = 1;
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}
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pci_save_state(pdev);
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pci_set_power_state(pdev, PCI_D3hot);
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return 0;
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@ -4052,6 +4053,7 @@ static int iwl_pci_resume(struct pci_dev *pdev)
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struct iwl_priv *priv = pci_get_drvdata(pdev);
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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if (priv->is_open)
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iwl_mac_start(priv->hw);
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@ -8143,6 +8143,7 @@ static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
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priv->is_open = 1;
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}
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pci_save_state(pdev);
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pci_set_power_state(pdev, PCI_D3hot);
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return 0;
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@ -8153,6 +8154,7 @@ static int iwl3945_pci_resume(struct pci_dev *pdev)
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struct iwl3945_priv *priv = pci_get_drvdata(pdev);
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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if (priv->is_open)
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iwl3945_mac_start(priv->hw);
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