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USB Elan FTDI: check for workqueue creation

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Avoid NULL pointer usage if workqueue creation failed.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Cyrill Gorcunov 2007-03-06 02:47:44 -08:00 committed by Greg Kroah-Hartman
parent 834dbca5b6
commit ee17b28973
1 changed files with 16 additions and 2 deletions
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18
drivers/usb/misc/ftdi-elan.c
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@ -2905,17 +2905,31 @@ static int __init ftdi_elan_init(void)
{ {
int result; int result;
printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name, 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_MUTEX(&ftdi_module_lock);
INIT_LIST_HEAD(&ftdi_static_list); INIT_LIST_HEAD(&ftdi_static_list);
status_queue = create_singlethread_workqueue("ftdi-status-control"); status_queue = create_singlethread_workqueue("ftdi-status-control");
if (!status_queue)
goto err1;
command_queue = create_singlethread_workqueue("ftdi-command-engine"); command_queue = create_singlethread_workqueue("ftdi-command-engine");
if (!command_queue)
goto err2;
respond_queue = create_singlethread_workqueue("ftdi-respond-engine"); respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
if (!respond_queue)
goto err3;
result = usb_register(&ftdi_elan_driver); result = usb_register(&ftdi_elan_driver);
if (result) if (result)
printk(KERN_ERR "usb_register failed. Error number %d\n", printk(KERN_ERR "usb_register failed. Error number %d\n",
result); result);
return 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) static void __exit ftdi_elan_exit(void)