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IB/srpt: Introduce srpt_process_wait_list()

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This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Estrin <alex.estrin@intel.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2016-02-11 11:09:50 -08:00 committed by Doug Ledford
parent 043a6806a4
commit 539b3248d7
1 changed files with 24 additions and 18 deletions
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42
drivers/infiniband/ulp/srpt/ib_srpt.c
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@ -1730,6 +1730,28 @@ static void srpt_recv_done(struct ib_cq *cq, struct ib_wc *wc)
}
}
/*
* This function must be called from the context in which RDMA completions are
* processed because it accesses the wait list without protection against
* access from other threads.
*/
static void srpt_process_wait_list(struct srpt_rdma_ch *ch)
{
struct srpt_send_ioctx *ioctx;
while (!list_empty(&ch->cmd_wait_list) &&
ch->state >= CH_LIVE &&
(ioctx = srpt_get_send_ioctx(ch)) != NULL) {
struct srpt_recv_ioctx *recv_ioctx;
recv_ioctx = list_first_entry(&ch->cmd_wait_list,
struct srpt_recv_ioctx,
wait_list);
list_del(&recv_ioctx->wait_list);
srpt_handle_new_iu(ch, recv_ioctx, ioctx);
}
}
/**
* Note: Although this has not yet been observed during tests, at least in
* theory it is possible that the srpt_get_send_ioctx() call invoked by
@ -1769,17 +1791,7 @@ static void srpt_send_done(struct ib_cq *cq, struct ib_wc *wc)
" wr_id = %u.\n", ioctx->ioctx.index);
}
while (!list_empty(&ch->cmd_wait_list) &&
ch->state == CH_LIVE &&
(ioctx = srpt_get_send_ioctx(ch)) != NULL) {
struct srpt_recv_ioctx *recv_ioctx;
recv_ioctx = list_first_entry(&ch->cmd_wait_list,
struct srpt_recv_ioctx,
wait_list);
list_del(&recv_ioctx->wait_list);
srpt_handle_new_iu(ch, recv_ioctx, ioctx);
}
srpt_process_wait_list(ch);
}
/**
@ -2310,15 +2322,9 @@ static void srpt_cm_rtu_recv(struct srpt_rdma_ch *ch)
int ret;
if (srpt_set_ch_state(ch, CH_LIVE)) {
struct srpt_recv_ioctx *ioctx, *ioctx_tmp;
ret = srpt_ch_qp_rts(ch, ch->qp);
list_for_each_entry_safe(ioctx, ioctx_tmp, &ch->cmd_wait_list,
wait_list) {
list_del(&ioctx->wait_list);
srpt_handle_new_iu(ch, ioctx, NULL);
}
srpt_process_wait_list(ch);
if (ret)
srpt_close_ch(ch);
}