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isdn: mISDN: netjet: fix wrong check of device registration 

The class is set in mISDN_register_device(), but if device_add() returns
error, it will lead to delete a device without added, fix this by using
device_is_registered() to check if the device is registered.

Fixes: a900845e56 ("mISDN: Add support for Traverse Technologies NETJet PCI cards")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yang Yingliang 2022-10-31 20:13:41 +08:00 committed by David S. Miller
parent e7d1d4d9ac
commit bf00f54260
1 changed files with 1 additions and 1 deletions
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2
drivers/isdn/hardware/mISDN/netjet.c
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@ -956,7 +956,7 @@ nj_release(struct tiger_hw *card)
}
if (card->irq > 0)
free_irq(card->irq, card);
if (card->isac.dch.dev.dev.class)
if (device_is_registered(&card->isac.dch.dev.dev))
mISDN_unregister_device(&card->isac.dch.dev);
for (i = 0; i < 2; i++) {