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block/nvme: Let nvme_create_queue_pair() fail gracefully 

As nvme_create_queue_pair() is allowed to fail, replace the
alloc() calls by try_alloc() to avoid aborting QEMU.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200821195359.1285345-4-philmd@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-08-21 21:53:47 +02:00 committed by Kevin Wolf
parent e266f52cfb
commit 0ea45f76eb
1 changed files with 10 additions and 2 deletions
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12
block/nvme.c
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@ -213,14 +213,22 @@ static NVMeQueuePair *nvme_create_queue_pair(BlockDriverState *bs,
int i, r;
BDRVNVMeState *s = bs->opaque;
Error *local_err = NULL;
NVMeQueuePair *q = g_new0(NVMeQueuePair, 1);
NVMeQueuePair *q;
uint64_t prp_list_iova;
q = g_try_new0(NVMeQueuePair, 1);
if (!q) {
return NULL;
}
q->prp_list_pages = qemu_try_blockalign0(bs,
s->page_size * NVME_NUM_REQS);
if (!q->prp_list_pages) {
goto fail;
}
qemu_mutex_init(&q->lock);
q->s = s;
q->index = idx;
qemu_co_queue_init(&q->free_req_queue);
q->prp_list_pages = qemu_blockalign0(bs, s->page_size * NVME_NUM_REQS);
q->completion_bh = aio_bh_new(bdrv_get_aio_context(bs),
nvme_process_completion_bh, q);
r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages,