diff mbox series

[v2,05/11] block/nvme: Have nvme_create_queue_pair() report errors consistently

Message ID 20210826195014.2180369-6-philmd@redhat.com (mailing list archive)
State New, archived
Headers show
Series block/nvme: Rework error reporting | expand

Commit Message

Philippe Mathieu-Daudé Aug. 26, 2021, 7:50 p.m. UTC 
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>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 block/nvme.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Klaus Jensen Aug. 27, 2021, 5:54 a.m. UTC | #1 
On Aug 26 21:50, Philippe Mathieu-Daudé wrote:
> 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>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
diff mbox series

Patch

diff --git a/block/nvme.c b/block/nvme.c
index e8dbbc23177..0786c501e46 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -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;