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hw/nvme: Update the initalization place for the AER queue

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This patch updates the initialization place for the AER queue, so it’s
initialized once, at controller initialization, and not every time
controller is enabled.

While the original version works for a non-SR-IOV device, as it’s hard
to interact with the controller if it’s not enabled, the multiple
reinitialization is not necessarily correct.

With the SR/IOV feature enabled a segfault can happen: a VF can have its
controller disabled, while a namespace can still be attached to the
controller through the parent PF. An event generated in such case ends
up on an uninitialized queue.

While it’s an interesting question whether a VF should support AER in
the first place, I don’t think it must be answered today.

Signed-off-by: Łukasz Gieryk <lukasz.gieryk@linux.intel.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Łukasz Gieryk 2022-05-09 16:16:19 +02:00 committed by Klaus Jensen
parent 751babf5bb
commit b7698b917a
1 changed files with 1 additions and 2 deletions
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3
hw/nvme/ctrl.c
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@ -6328,8 +6328,6 @@ static int nvme_start_ctrl(NvmeCtrl *n)
nvme_set_timestamp(n, 0ULL);
QTAILQ_INIT(&n->aer_queue);
nvme_select_iocs(n);
return 0;
@ -6989,6 +6987,7 @@ static void nvme_init_state(NvmeCtrl *n)
n->features.temp_thresh_hi = NVME_TEMPERATURE_WARNING;
n->starttime_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
n->aer_reqs = g_new0(NvmeRequest *, n->params.aerl + 1);
QTAILQ_INIT(&n->aer_queue);
list->numcntl = cpu_to_le16(max_vfs);
for (i = 0; i < max_vfs; i++) {