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From: bugzilla-daemon@bugzilla.kernel.org
To: linuxppc-dev@lists.ozlabs.org
Subject: [Bug 213961] Oops while loading radeon driver
Date: Thu, 05 Aug 2021 08:04:08 +0000
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X-Bugzilla-Who: christophe.leroy@csgroup.eu
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https://bugzilla.kernel.org/show_bug.cgi?id=3D213961

--- Comment #8 from Christophe Leroy (christophe.leroy@csgroup.eu) ---
Great:

[   15.246367] NIP [bea42a80] radeon_agp_head_init+0x1c/0xf8 [radeon]
[   15.246969] LR [bea39860] radeon_driver_load_kms+0x1bc/0x1f4 [radeon]
[   15.247160] Call Trace:
[   15.247168] [f2b75c30] [c0c1ec60] 0xc0c1ec60 (unreliable)
[   15.247180] [f2b75c50] [bea39860] radeon_driver_load_kms+0x1bc/0x1f4
[radeon]
[   15.247343] [f2b75c80] [be8cc74c] drm_dev_register+0x10c/0x268 [drm]
[   15.247718] [f2b75cb0] [bea36484] radeon_pci_probe+0x108/0x190 [radeon]
[   15.248001] [f2b75cd0] [c03832fc] pci_device_probe+0xf4/0x1a4

So we now know we have a NULL pointer dereference in radeon_agp_head_init().

Looks like all this code is quite recent, at least there are recent
modification, so I think you should address it with RADEON people, I'm not =
sure
the problem is a PPC32 subject.

--=20
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