sys/kern/kern_linker.c patch

[Ustimenko Semen]

Imagine:

I'm trying to unload KLD module, it is busy:

# kldunload -n ntfs
kldunload: can't unload file: Device busy

After this point i'll never get module unloaded becouse
kldunload() in sys/kern/kern_linker.c has already decremeted
lf->userrefs. I'll get only this messages:

# kldunload -n ntfs
Jan 18 17:10:13 ws21 /kernel: linkerunload: attempt to unload file which
was not loaded by user
kldunload: can't unload file: Device busy

Here is patch.
*** kern_linker.c.orig  Mon Jan 18 17:22:39 1999
--- kern_linker.c       Mon Jan 18 16:40:33 1999
***************
*** 653,660 ****
            error = EBUSY;
            goto out;
        }
-       lf->userrefs--;
        error = linker_file_unload(lf);
      } else
        error = ENOENT;
  
--- 653,662 ----
            error = EBUSY;
            goto out;
        }
        error = linker_file_unload(lf);
+       if(error)
+           goto out;
+       lf->userrefs--;
      } else
        error = ENOENT;
  


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