From 52b75ea8ec4f6cd8028bd8406ebcf2e80ffc6e05 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Thu, 29 Oct 2020 10:32:56 +0100 Subject: [PATCH] block/nvme: Simplify ADMIN queue access MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We don't need to dereference from BDRVNVMeState each time. Use a NVMeQueuePair pointer on the admin queue. The nvme_init() becomes easier to review, matching the style of nvme_add_io_queue(). Reviewed-by: Eric Auger Reviewed-by: Stefan Hajnoczi Tested-by: Eric Auger Signed-off-by: Philippe Mathieu-Daudé Message-id: 20201029093306.1063879-16-philmd@redhat.com Signed-off-by: Stefan Hajnoczi Tested-by: Eric Auger --- block/nvme.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/block/nvme.c b/block/nvme.c index 0902aa5542..eed12f4933 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -700,6 +700,7 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace, Error **errp) { BDRVNVMeState *s = bs->opaque; + NVMeQueuePair *q; AioContext *aio_context = bdrv_get_aio_context(bs); int ret; uint64_t cap; @@ -781,19 +782,18 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace, /* Set up admin queue. */ s->queues = g_new(NVMeQueuePair *, 1); - s->queues[INDEX_ADMIN] = nvme_create_queue_pair(s, aio_context, 0, - NVME_QUEUE_SIZE, - errp); - if (!s->queues[INDEX_ADMIN]) { + q = nvme_create_queue_pair(s, aio_context, 0, NVME_QUEUE_SIZE, errp); + if (!q) { ret = -EINVAL; goto out; } + s->queues[INDEX_ADMIN] = q; s->queue_count = 1; QEMU_BUILD_BUG_ON((NVME_QUEUE_SIZE - 1) & 0xF000); regs->aqa = cpu_to_le32(((NVME_QUEUE_SIZE - 1) << AQA_ACQS_SHIFT) | ((NVME_QUEUE_SIZE - 1) << AQA_ASQS_SHIFT)); - regs->asq = cpu_to_le64(s->queues[INDEX_ADMIN]->sq.iova); - regs->acq = cpu_to_le64(s->queues[INDEX_ADMIN]->cq.iova); + regs->asq = cpu_to_le64(q->sq.iova); + regs->acq = cpu_to_le64(q->cq.iova); /* After setting up all control registers we can enable device now. */ regs->cc = cpu_to_le32((ctz32(NVME_CQ_ENTRY_BYTES) << CC_IOCQES_SHIFT) |