• Roland Dreier's avatar
    IB/mthca: Use IRQ safe locks to protect allocation bitmaps · 5a4e6dcc
    Roland Dreier authored
    It is supposed to be OK to call mthca_create_ah() and mthca_destroy_ah()
    from any context.  However, for mem-full HCAs, these functions use the
    mthca_alloc() and mthca_free() bitmap helpers, and those helpers use
    non-IRQ-safe spin_lock() internally.  Lockdep correctly warns that
    this could lead to a deadlock.  Fix this by changing mthca_alloc() and
    mthca_free() to use spin_lock_irqsave().
    Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
mthca_allocator.c 7.53 KB