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staging: most: usb: check for NULL device

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Check if the dci structer has been allocated before trying to release it.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Link: https://lore.kernel.org/r/1579793906-5054-8-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Gromm 2020-01-23 16:38:23 +01:00 committed by Greg Kroah-Hartman
parent f9e6b51a99
commit fc157998b8
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/most/usb/usb.c
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@ -1218,7 +1218,8 @@ static void hdm_disconnect(struct usb_interface *interface)
del_timer_sync(&mdev->link_stat_timer);
cancel_work_sync(&mdev->poll_work_obj);
device_unregister(&mdev->dci->dev);
if (mdev->dci)
device_unregister(&mdev->dci->dev);
most_deregister_interface(&mdev->iface);
kfree(mdev->busy_urbs);