iwl3945: use cancel_delayed_work_sync to cancel rfkill_poll
Users reported lockup with work still trying to run after module has been unloaded. http://thread.gmane.org/gmane.linux.kernel.wireless.general/30594/focus=30601 Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Reported-by: TJ <ubuntu@tjworld.net> Reported-by: Huaxu Wan <huaxu.wan@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -5196,7 +5196,7 @@ static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
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sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
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iwl_rfkill_unregister(priv);
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cancel_delayed_work(&priv->rfkill_poll);
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cancel_delayed_work_sync(&priv->rfkill_poll);
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iwl3945_dealloc_ucode_pci(priv);
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