Messages in this thread | | | From | Alexandre Courbot <> | Subject | Issue with DRM and "reimplement IDR and IDA using the radix tree" | Date | Tue, 13 Dec 2016 16:14:00 +0900 |
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Hi Matthew,
Trying the latest -next on the Jetson TK1 board (with two different DRM devices and display and render), I noticed that the GPU device probe always failed with error -ENOSPC. After investigating I figured out that this was due to the minor device allocation failing when a second DRM device is added.
More precisely, when drm_minor_alloc() is called with DRM_MINOR_PRIMARY (0) as argument for a second time, the call to idr_alloc() (which has a requested range of 0..64) fails instead of returning 1 as expected. Note that the first call is successful.
Reverting "reimplement IDR and IDA using the radix tree" on 20161213's next fixes the issue for me, suggesting a bug may have slipped in there.
Not sure how this could be fixed, so reporting the issue for now in case it is not known yet.
Cheers, Alex.
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