diff options
| author | Keith Busch <kbusch@kernel.org> | 2020-03-04 09:17:01 -0800 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2020-03-26 04:48:06 +0900 |
| commit | fa059b856a593a7bddd4d3779ae8ab1380e05d91 (patch) | |
| tree | 8455c407848d9105e57189b84d3d40fbf9f1a63b /drivers/nvme | |
| parent | 324b494c286298d51bc5ed5107644ebe23f9dad6 (diff) | |
| download | linux-fa059b856a593a7bddd4d3779ae8ab1380e05d91.tar.bz2 | |
nvme-pci: Simplify nvme_poll_irqdisable
The timeout handler can use the existing nvme_poll() if it needs to
check a polled queue, allowing nvme_poll_irqdisable() to handle only
irq driven queues for the remaining callers.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 02f22c63adcf..f45e26e6af7e 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1020,30 +1020,18 @@ static irqreturn_t nvme_irq_check(int irq, void *data) } /* - * Poll for completions any queue, including those not dedicated to polling. + * Poll for completions for any interrupt driven queue * Can be called from any context. */ -static int nvme_poll_irqdisable(struct nvme_queue *nvmeq) +static void nvme_poll_irqdisable(struct nvme_queue *nvmeq) { struct pci_dev *pdev = to_pci_dev(nvmeq->dev->dev); - int found; - /* - * For a poll queue we need to protect against the polling thread - * using the CQ lock. For normal interrupt driven threads we have - * to disable the interrupt to avoid racing with it. - */ - if (test_bit(NVMEQ_POLLED, &nvmeq->flags)) { - spin_lock(&nvmeq->cq_poll_lock); - found = nvme_process_cq(nvmeq); - spin_unlock(&nvmeq->cq_poll_lock); - } else { - disable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)); - found = nvme_process_cq(nvmeq); - enable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)); - } + WARN_ON_ONCE(test_bit(NVMEQ_POLLED, &nvmeq->flags)); - return found; + disable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)); + nvme_process_cq(nvmeq); + enable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)); } static int nvme_poll(struct blk_mq_hw_ctx *hctx) @@ -1232,7 +1220,11 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) /* * Did we miss an interrupt? */ - nvme_poll_irqdisable(nvmeq); + if (test_bit(NVMEQ_POLLED, &nvmeq->flags)) + nvme_poll(req->mq_hctx); + else + nvme_poll_irqdisable(nvmeq); + if (blk_mq_request_completed(req)) { dev_warn(dev->ctrl.device, "I/O %d QID %d timeout, completion polled\n", |