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The ibmebus_free_irq() function, which might sleep, was called with interrupts disabled. To fix this, make sure that no interrupts are running by killing the interrupt tasklet. Also lock the shca_list_lock to protect against the poll_eqs_timer running concurrently. Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>