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| author | Joerg Roedel <jroedel@suse.de> | 2017-06-28 13:52:48 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-06-28 14:29:46 +0300 |
| commit | 72dcac633475a5b331cf21f3525467d0e123395a (patch) | |
| tree | ef6aa57bb06464b46957fa6bb218964906495c91 /drivers/iommu/iommu.c | |
| parent | 8faf5e5a12c511410de1590cf310ec331c5ec7b1 (diff) | |
| download | linux-72dcac633475a5b331cf21f3525467d0e123395a.tar.xz | |
iommu: Warn once when device_group callback returns NULL
This callback should never return NULL. Print a warning if
that happens so that we notice and can fix it.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index de09e1e35830..3f6ea160afed 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1010,6 +1010,9 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) if (ops && ops->device_group) group = ops->device_group(dev); + if (WARN_ON_ONCE(group == NULL)) + return ERR_PTR(-EINVAL); + if (IS_ERR(group)) return group; |