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USB: dummy-hcd: use dynamic allocation for platform_devices

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This patch (as1075) changes dummy-hcd to dynamically allocate its
platform_device structures, using the core platform_device_alloc()
interface.  This is what it should have done all along, because the
dynamically-allocated structures have a release method in the driver
core and are therefore immune to being released after the module has
been unloaded.

Thanks to Richard Purdie for pointing out the need for this change.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2008-04-07 15:03:25 -04:00 committed by Greg Kroah-Hartman
parent 0e530b4578
commit a89a2cd396
1 changed files with 29 additions and 41 deletions
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70
drivers/usb/gadget/dummy_hcd.c
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@ -1933,69 +1933,57 @@ static struct platform_driver dummy_hcd_driver = {
/*-------------------------------------------------------------------------*/
/* These don't need to do anything because the pdev structures are
* statically allocated. */
static void
dummy_udc_release (struct device *dev) {}
static void
dummy_hcd_release (struct device *dev) {}
static struct platform_device the_udc_pdev = {
.name = (char *) gadget_name,
.id = -1,
.dev = {
.release = dummy_udc_release,
},
};
static struct platform_device the_hcd_pdev = {
.name = (char *) driver_name,
.id = -1,
.dev = {
.release = dummy_hcd_release,
},
};
static struct platform_device *the_udc_pdev;
static struct platform_device *the_hcd_pdev;
static int __init init (void)
{
int retval;
int retval = -ENOMEM;
if (usb_disabled ())
return -ENODEV;
retval = platform_driver_register (&dummy_hcd_driver);
if (retval < 0)
the_hcd_pdev = platform_device_alloc(driver_name, -1);
if (!the_hcd_pdev)
return retval;
the_udc_pdev = platform_device_alloc(gadget_name, -1);
if (!the_udc_pdev)
goto err_alloc_udc;
retval = platform_driver_register (&dummy_udc_driver);
retval = platform_driver_register(&dummy_hcd_driver);
if (retval < 0)
goto err_register_hcd_driver;
retval = platform_driver_register(&dummy_udc_driver);
if (retval < 0)
goto err_register_udc_driver;
retval = platform_device_register (&the_hcd_pdev);
retval = platform_device_add(the_hcd_pdev);
if (retval < 0)
goto err_register_hcd;
retval = platform_device_register (&the_udc_pdev);
goto err_add_hcd;
retval = platform_device_add(the_udc_pdev);
if (retval < 0)
goto err_register_udc;
goto err_add_udc;
return retval;
err_register_udc:
platform_device_unregister (&the_hcd_pdev);
err_register_hcd:
platform_driver_unregister (&dummy_udc_driver);
err_add_udc:
platform_device_del(the_hcd_pdev);
err_add_hcd:
platform_driver_unregister(&dummy_udc_driver);
err_register_udc_driver:
platform_driver_unregister (&dummy_hcd_driver);
platform_driver_unregister(&dummy_hcd_driver);
err_register_hcd_driver:
platform_device_put(the_udc_pdev);
err_alloc_udc:
platform_device_put(the_hcd_pdev);
return retval;
}
module_init (init);
static void __exit cleanup (void)
{
platform_device_unregister (&the_udc_pdev);
platform_device_unregister (&the_hcd_pdev);
platform_driver_unregister (&dummy_udc_driver);
platform_driver_unregister (&dummy_hcd_driver);
platform_device_unregister(the_udc_pdev);
platform_device_unregister(the_hcd_pdev);
platform_driver_unregister(&dummy_udc_driver);
platform_driver_unregister(&dummy_hcd_driver);
}
module_exit (cleanup);