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ib_srpt: Introduce the function srpt_set_ch_state_to_draining()

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@3527 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2011-06-04 12:36:03 +00:00
parent 554dad3475
commit 32725f9048
1 changed files with 22 additions and 6 deletions
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srpt/src/ib_srpt.c
+22 -6
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@@ -186,6 +186,27 @@ srpt_set_ch_state(struct srpt_rdma_ch *ch, enum rdma_ch_state new_state)
return prev;
}
static bool srpt_set_ch_state_to_draining(struct srpt_rdma_ch *ch)
{
unsigned long flags;
bool changed_state = false;
spin_lock_irqsave(&ch->spinlock, flags);
switch (ch->state) {
case CH_CONNECTING:
case CH_LIVE:
case CH_DISCONNECTING:
ch->state = CH_DRAINING;
changed_state = true;
break;
default:
break;
}
spin_unlock_irqrestore(&ch->spinlock, flags);
return changed_state;
}
/**
* srpt_test_and_set_ch_state() - Test and set the channel state.
*
@@ -2092,12 +2113,7 @@ static void srpt_drain_channel(struct ib_cm_id *cm_id)
spin_lock_irq(&sdev->spinlock);
list_for_each_entry(ch, &sdev->rch_list, list) {
if (ch->cm_id == cm_id) {
do_reset = srpt_test_and_set_ch_state(ch,
CH_CONNECTING, CH_DRAINING) ||
srpt_test_and_set_ch_state(ch,
CH_LIVE, CH_DRAINING) ||
srpt_test_and_set_ch_state(ch,
CH_DISCONNECTING, CH_DRAINING);
do_reset = srpt_set_ch_state_to_draining(ch);
break;
}
}