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-rw-r--r--lib/irq_poll.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/irq_poll.c b/lib/irq_poll.c
index 88af87971e8c..43a3370a09fd 100644
--- a/lib/irq_poll.c
+++ b/lib/irq_poll.c
@@ -21,13 +21,17 @@ static DEFINE_PER_CPU(struct list_head, blk_cpu_iopoll);
*
* Description:
* Add this irq_poll structure to the pending poll list and trigger the
- * raise of the blk iopoll softirq. The driver must already have gotten a
- * successful return from irq_poll_sched_prep() before calling this.
+ * raise of the blk iopoll softirq.
**/
void irq_poll_sched(struct irq_poll *iop)
{
unsigned long flags;
+ if (test_bit(IRQ_POLL_F_DISABLE, &iop->state))
+ return;
+ if (!test_and_set_bit(IRQ_POLL_F_SCHED, &iop->state))
+ return;
+
local_irq_save(flags);
list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll));
__raise_softirq_irqoff(IRQ_POLL_SOFTIRQ);
@@ -58,7 +62,7 @@ EXPORT_SYMBOL(__irq_poll_complete);
* Description:
* If a driver consumes less than the assigned budget in its run of the
* iopoll handler, it'll end the polled mode by calling this function. The
- * iopoll handler will not be invoked again before irq_poll_sched_prep()
+ * iopoll handler will not be invoked again before irq_poll_sched()
* is called.
**/
void irq_poll_complete(struct irq_poll *iop)