On Sat, Sep 01, 2018 at 08:06:59PM +0800, Jia-Ju Bai wrote: > The driver may sleep with holding a spinlock. > > The function call paths (from bottom to top) in Linux-4.16 are: > > [FUNC] alloc_mad_private(GFP_KERNEL) > drivers/infiniband/core/mad.c, 2264: > alloc_mad_private in ib_mad_recv_done > drivers/infiniband/core/cq.c, 45: > [FUNC_PTR]ib_mad_recv_done in __ib_process_cq > drivers/infiniband/core/cq.c, 77: > __ib_process_cq in ib_process_cq_direct > drivers/infiniband/ulp/srp/ib_srp.c, 2010: > ib_process_cq_direct in __srp_get_tx_iu > drivers/infiniband/ulp/srp/ib_srp.c, 2353: > __srp_get_tx_iu in srp_queuecommand > drivers/infiniband/ulp/srp/ib_srp.c, 2352: > _raw_spin_lock_irqsave in srp_queuecommand > > [FUNC] alloc_mad_private(GFP_KERNEL) > drivers/infiniband/core/mad.c, 2264: > alloc_mad_private in ib_mad_recv_done > drivers/infiniband/core/cq.c, 45: > [FUNC_PTR]ib_mad_recv_done in __ib_process_cq > drivers/infiniband/core/cq.c, 77: > __ib_process_cq in ib_process_cq_direct This trace doesn't seem right, the CQ used by SRP will never have ib_mad_recv_done as a function pointer. Jason
