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authorKeith Busch <kbusch@kernel.org>2019-12-03 05:53:30 +0900
committerKeith Busch <kbusch@kernel.org>2019-12-04 00:38:06 +0900
commitf6c4d97b0d82ed1240690c91f06214018b1531ef (patch)
tree8d58161ed9c9cb748e87f426b2531b9f115487b4 /drivers/nvme
parent22802bf742c25b1e2473c70b3b99da98af65ef4d (diff)
nvme/pci: Remove last_cq_head
We had been saving the last_cq_head seen from an interrupt so that a polled queue wouldn't mistakenly trigger spruious interrupt detection. We don't poll interrupt driven queues any more, so saving this value is pointless. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/pci.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 9d307593b94f..0590640ba62c 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -176,7 +176,6 @@ struct nvme_queue {
u16 sq_tail;
u16 last_sq_tail;
u16 cq_head;
- u16 last_cq_head;
u16 qid;
u8 cq_phase;
u8 sqes;
@@ -1026,10 +1025,7 @@ static irqreturn_t nvme_irq(int irq, void *data)
* the irq handler, even if that was on another CPU.
*/
rmb();
- if (nvmeq->cq_head != nvmeq->last_cq_head)
- ret = IRQ_HANDLED;
nvme_process_cq(nvmeq, &start, &end, -1);
- nvmeq->last_cq_head = nvmeq->cq_head;
wmb();
if (start != end) {