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| author |  Alvaro Karsz <alvaro.karsz@solid-run.com>
| 2023-02-02 10:42:12 +0200 |
|---|---|---|
| committer |  Michael S. Tsirkin <mst@redhat.com>
| 2023-02-20 19:26:59 -0500 |
| commit | 6830a6aba9d40f1491f991d7b31bb2b90187111c (patch) | |
| tree | 65aa82ac45ddf3774100f11190846d281e208109 /drivers/vhost | |
| parent | scsi: virtio_scsi: fix handling of kmalloc failure (diff) | |
| download | linux-6830a6aba9d40f1491f991d7b31bb2b90187111c.tar.gz linux-6830a6aba9d40f1491f991d7b31bb2b90187111c.tar.bz2 linux-6830a6aba9d40f1491f991d7b31bb2b90187111c.zip | |
vhost-vdpa: print warning when vhost_vdpa_alloc_domain fails
Add a print explaining why vhost_vdpa_alloc_domain failed if the device
is not IOMMU cache coherent capable.
Without this print, we have no hint why the operation failed.
For example:
$ virsh start <domain>
error: Failed to start domain <domain>
error: Unable to open '/dev/vhost-vdpa-<idx>' for vdpa device:
Unknown error 524
Suggested-by: Eugenio Perez Martin <eperezma@redhat.com>
Signed-off-by: Alvaro Karsz <alvaro.karsz@solid-run.com>
Message-Id: <20230202084212.1328530-1-alvaro.karsz@solid-run.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eugenio Pérez Martin <eperezma@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 23db92388393..135f8aa70fb2 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -1151,8 +1151,11 @@ static int vhost_vdpa_alloc_domain(struct vhost_vdpa *v) if (!bus) return -EFAULT; - if (!device_iommu_capable(dma_dev, IOMMU_CAP_CACHE_COHERENCY)) + if (!device_iommu_capable(dma_dev, IOMMU_CAP_CACHE_COHERENCY)) { + dev_warn_once(&v->dev, + "Failed to allocate domain, device is not IOMMU cache coherent capable\n"); return -ENOTSUPP; + } v->domain = iommu_domain_alloc(bus); if (!v->domain) |