net/smc: handle unregistered buffers
When smc_wr_reg_send() fails then tag (regerr) the affected buffer and free it in smc_buf_unuse(). Signed-off-by: NKarsten Graul <kgraul@linux.ibm.com> Signed-off-by: NUrsula Braun <ubraun@linux.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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