From ee17b289732e04fdcdd8ce2ce19b18d3e8b08e20 Mon Sep 17 00:00:00 2001 From: Cyrill Gorcunov Date: Tue, 6 Mar 2007 02:47:44 -0800 Subject: [PATCH] USB Elan FTDI: check for workqueue creation Avoid NULL pointer usage if workqueue creation failed. Signed-off-by: Cyrill Gorcunov Cc: Pete Zaitcev Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/ftdi-elan.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c index 0c1d66ddb81..bc3327e3dd7 100644 --- a/drivers/usb/misc/ftdi-elan.c +++ b/drivers/usb/misc/ftdi-elan.c @@ -2905,17 +2905,31 @@ static int __init ftdi_elan_init(void) { int result; printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name, - __TIME__, __DATE__); + __TIME__, __DATE__); init_MUTEX(&ftdi_module_lock); INIT_LIST_HEAD(&ftdi_static_list); status_queue = create_singlethread_workqueue("ftdi-status-control"); + if (!status_queue) + goto err1; command_queue = create_singlethread_workqueue("ftdi-command-engine"); + if (!command_queue) + goto err2; respond_queue = create_singlethread_workqueue("ftdi-respond-engine"); + if (!respond_queue) + goto err3; result = usb_register(&ftdi_elan_driver); if (result) printk(KERN_ERR "usb_register failed. Error number %d\n", - result); + result); return result; + + err3: + destroy_workqueue(command_queue); + err2: + destroy_workqueue(status_queue); + err1: + printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name); + return -ENOMEM; } static void __exit ftdi_elan_exit(void) -- 2.20.1