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pcmcia: cs: fix possible hung task and memory leak pccardd()

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If device_register() returns error in pccardd(), it leads two issues:

1. The socket_released has never been completed, it will block
   pcmcia_unregister_socket(), because of waiting for completion
   of socket_released.
2. The device name allocated by dev_set_name() is leaked.

Fix this two issues by calling put_device() when device_register() fails.
socket_released can be completed in pcmcia_release_socket(), the name can
be freed in kobject_cleanup().

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Yang Yingliang 2022-11-12 17:25:41 +08:00 committed by Dominik Brodowski
parent 2dde18cd1d
commit e3ea1b4847
1 changed files with 1 additions and 0 deletions
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drivers/pcmcia/cs.c
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@ -605,6 +605,7 @@ static int pccardd(void *__skt)
dev_warn(&skt->dev, "PCMCIA: unable to register socket\n");
skt->thread = NULL;
complete(&skt->thread_done);
put_device(&skt->dev);
return 0;
}
ret = pccard_sysfs_add_socket(&skt->dev);