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Fix potential scheduling while atomic in mesh_path_add.

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Calling synchronize_rcu() under write-lock-ed pathtbl_resize_lock may
result in this warning (and other side effects).

It looks safe just dropping this lock before calling synchronize_rcu.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Pavel Emelyanov 2008-05-06 18:51:31 +04:00 committed by John W. Linville
parent 0eb03d5a14
commit 6d6936e2ea
1 changed files with 2 additions and 1 deletions
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3
net/mac80211/mesh_pathtbl.c
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@ -220,9 +220,10 @@ endadd:
return -ENOMEM; return -ENOMEM;
} }
rcu_assign_pointer(mesh_paths, newtbl); rcu_assign_pointer(mesh_paths, newtbl);
write_unlock(&pathtbl_resize_lock);
synchronize_rcu(); synchronize_rcu();
mesh_table_free(oldtbl, false); mesh_table_free(oldtbl, false);
write_unlock(&pathtbl_resize_lock);
} }
endadd2: endadd2:
return err; return err;