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>
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@ -776,7 +776,7 @@ multi_t2_fnd:
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set_current_state(TASK_RUNNING);
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}
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return 0;
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module_put_and_exit(0);
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}
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/* extract the host portion of the UNC string */
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@ -2176,10 +2176,17 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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so no need to spinlock this init of tcpStatus */
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srvTcp->tcpStatus = CifsNew;
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init_MUTEX(&srvTcp->tcpSem);
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/*
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* since we're in a cifs function already, we know that
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* this will succeed. No need for try_module_get().
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*/
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__module_get(THIS_MODULE);
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srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
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if (IS_ERR(srvTcp->tsk)) {
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rc = PTR_ERR(srvTcp->tsk);
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cERROR(1, ("error %d create cifsd thread", rc));
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module_put(THIS_MODULE);
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srvTcp->tsk = NULL;
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sock_release(csocket);
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kfree(srvTcp->hostname);
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