gpu: host1x: Avoid double device_add when clients already present

host1x_device_add looks through the idle clients list to populate
subdevs, and any matches entries are moved from the subdevs list
to the active list. If all subdevs are populated, device_add will
be called on the device. The secondary "subdevs list empty" check
will then incorrectly again call device_add.

However, this would require a convoluted scenario since clients don't
typically end up on the idle clients list.

Fix by checking whether the device was already added before adding
again.

Fixes: fab823d82ee5 ("gpu: host1x: Allow loading tegra-drm without enabled engines")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260609-b4-host1x-small-fixes-a-v1-2-7c1131c0b3ad@nvidia.com

0 files changed, 0 insertions, 0 deletions