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block/nvme: Have nvme_create_queue_pair() report errors consistently 

nvme_create_queue_pair() does not return a boolean value (indicating
eventual error) but a pointer, and is inconsistent in how it fills the
error handler. To fulfill callers expectations, always set an error
message on failure.

Reported-by: Auger Eric <eric.auger@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210902070025.197072-6-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
master
Philippe Mathieu-Daudé 2021-09-02 09:00:19 +02:00 committed by Stefan Hajnoczi
parent 3f4c0affcf
commit 526c37c19d
1 changed files with 3 additions and 0 deletions
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3
block/nvme.c
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@ -220,6 +220,7 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState *s,
q = g_try_new0(NVMeQueuePair, 1);
if (!q) {
error_setg(errp, "Cannot allocate queue pair");
return NULL;
}
trace_nvme_create_queue_pair(idx, q, size, aio_context,
@ -228,6 +229,7 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState *s,
qemu_real_host_page_size);
q->prp_list_pages = qemu_try_memalign(qemu_real_host_page_size, bytes);
if (!q->prp_list_pages) {
error_setg(errp, "Cannot allocate PRP page list");
goto fail;
}
memset(q->prp_list_pages, 0, bytes);
@ -239,6 +241,7 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState *s,
r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages, bytes,
false, &prp_list_iova);
if (r) {
error_setg_errno(errp, -r, "Cannot map buffer for DMA");
goto fail;
}
q->free_req_head = -1;