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cifs: take module reference when starting cifsd 

cifsd can outlive the last cifs mount. We need to hold a module
reference until it exits to prevent someone from unplugging
the module until we're ready.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2008-12-01 07:09:35 -05:00 committed by Steve French
parent 80909022ce
commit 0468a2cf91
1 changed files with 8 additions and 1 deletions
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9
fs/cifs/connect.c
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@ -776,7 +776,7 @@ multi_t2_fnd:
set_current_state(TASK_RUNNING);
}
return 0;
module_put_and_exit(0);
}
/* extract the host portion of the UNC string */
@ -2176,10 +2176,17 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
so no need to spinlock this init of tcpStatus */
srvTcp->tcpStatus = CifsNew;
init_MUTEX(&srvTcp->tcpSem);
/*
* since we're in a cifs function already, we know that
* this will succeed. No need for try_module_get().
*/
__module_get(THIS_MODULE);
srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
if (IS_ERR(srvTcp->tsk)) {
rc = PTR_ERR(srvTcp->tsk);
cERROR(1, ("error %d create cifsd thread", rc));
module_put(THIS_MODULE);
srvTcp->tsk = NULL;
sock_release(csocket);
kfree(srvTcp->hostname);