On 01/17/2018 08:47 PM, JeffyChen wrote:
+static struct iommu_group *rk_iommu_device_group(struct device *dev)
+{
+ struct iommu_group *group;
+ int ret;
+
+ group = iommu_group_get(dev);
+ if (!group) {
This check is pointless - if dev->iommu_group were non-NULL you wouldn't
have been called in the first place.
right, it's allocated in the probe.
oops, sorry, i see, this is not needed because device_group() is only be
called when iommu_group_get() returns NULL
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