> -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf > Of Chunming Zhou > Sent: Thursday, May 11, 2017 6:28 AM > To: amd-gfx at lists.freedesktop.org > Cc: Zhou, David(ChunMing) > Subject: [PATCH] drm/amdgpu: fix NULL pointer panic of emit_gds_switch > > [ 338.384770] BUG: unable to handle kernel NULL pointer dereference at > (null) > [ 338.384817] IP: [< (null)>] (null) > [ 338.384843] PGD 0 > > [ 338.384865] Oops: 0010 [#1] SMP > [ 338.384881] Modules linked in: amdgpu(OE) ttm(OE) drm_kms_helper(E) > drm(E) i2c_algo_bit(E) fb_sys_fops(E) syscopyarea(E) sysfillrect(E) > sysimgblt(E) rpcsec_gss_krb5(E) nfsv4(E) nfs(E) fscache(E) > snd_hda_codec_realtek(E) snd_hda_codec_generic(E) > snd_hda_codec_hdmi(E) snd_hda_intel(E) snd_hda_codec(E) eeepc_wmi(E) > joydev(E) asus_wmi(E) sparse_keymap(E) video(E) snd_hda_core(E) > snd_hwdep(E) snd_pcm(E) snd_seq_midi(E) snd_seq_midi_event(E) > snd_rawmidi(E) snd_seq(E) snd_seq_device(E) snd_timer(E) snd(E) > soundcore(E) kvm(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) > ghash_clmulni_intel(E) aesni_intel(E) aes_x86_64(E) lrw(E) shpchp(E) > gf128mul(E) glue_helper(E) 8250_dw(E) ablk_helper(E) i2c_piix4(E) cryptd(E) > serio_raw(E) i2c_designware_platform(E) mac_hid(E) > i2c_designware_core(E) nfsd(E) auth_rpcgss(E) > [ 338.385293] nfs_acl(E) lockd(E) grace(E) sunrpc(E) parport_pc(E) ppdev(E) > lp(E) parport(E) autofs4(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) > r8169(E) ahci(E) mii(E) libahci(E) wmi(E) > [ 338.385395] CPU: 10 PID: 1477 Comm: sdma0 Tainted: G OE 4.9.0- > custom #4 > [ 338.385432] Hardware name: System manufacturer System Product > Name/PRIME B350-PLUS, BIOS 0606 04/06/2017 > [ 338.385477] task: ffff880209240000 task.stack: ffffc90001bd4000 > [ 338.385505] RIP: 0010:[<0000000000000000>] [< (null)>] (null) > [ 338.385543] RSP: 0018:ffffc90001bd7d40 EFLAGS: 00010202 > [ 338.385568] RAX: ffffffffa072c280 RBX: ffff8801d420f400 RCX: > 0000000000004000 > [ 338.385602] RDX: 0000000000000000 RSI: 0000000000000005 RDI: > ffff880212376018 > [ 338.385635] RBP: ffffc90001bd7da8 R08: 0000000000000000 R09: > 0000000000004000 > [ 338.385669] R10: 0000000000000000 R11: 0000000000000002 R12: > ffff880212370000 > [ 338.385702] R13: ffff880212370e90 R14: ffff880212376018 R15: > 0000000000000001 > [ 338.385738] FS: 0000000000000000(0000) GS:ffff88021ee80000(0000) > knlGS:0000000000000000 > [ 338.385776] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 338.385803] CR2: 0000000000000000 CR3: 0000000212352000 CR4: > 00000000003406e0 > [ 338.385834] Stack: > [ 338.385843] ffffffffa05d2313 ffffffff00000000 ffffc90000004000 > ffffffff811818d3 > [ 338.385879] 0000000000000018 ffff880212370a18 01ffc90000000000 > ffff8801bc5f2e00 > [ 338.385915] ffff8801d420f400 ffff880212376018 0000000000000000 > 0000000000000001 > [ 338.385950] Call Trace: > [ 338.385993] [<ffffffffa05d2313>] ? amdgpu_vm_flush+0x283/0x400 > [amdgpu] > [ 338.386025] [<ffffffff811818d3>] ? printk+0x4d/0x4f > [ 338.386074] [<ffffffffa05d4906>] amdgpu_ib_schedule+0x4a6/0x4d0 > [amdgpu] > [ 338.386140] [<ffffffffa0673e54>] amdgpu_job_run+0x64/0x180 [amdgpu] > [ 338.386203] [<ffffffffa0672e09>] amd_sched_main+0x2e9/0x4a0 > [amdgpu] > [ 338.386232] [<ffffffff810bfce0>] ? prepare_to_wait_event+0x110/0x110 > [ 338.386295] [<ffffffffa0672b20>] ? amd_sched_select_entity+0xe0/0xe0 > [amdgpu] > [ 338.386327] [<ffffffff8109b423>] kthread+0xd3/0xf0 > [ 338.386349] [<ffffffff8109b350>] ? kthread_park+0x60/0x60 > [ 338.386376] [<ffffffff817e1ee5>] ret_from_fork+0x25/0x30 > [ 338.386401] Code: Bad RIP value. > [ 338.386420] RIP [< (null)>] (null) > [ 338.386443] RSP <ffffc90001bd7d40> > [ 338.386458] CR2: 0000000000000000 > [ 338.398508] ---[ end trace 4c66fcdc74b9a0a2 ]--- > > Change-Id: I0867463a9ec13d0f16b7f95bcca218cd42c3e867 > Signed-off-by: Chunming Zhou <David1.Zhou at amd.com> Reviewed-by: Alex Deucher <alexander.deucher at amd.com> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c > index 84aba1a..bca1fb5 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c > @@ -783,7 +783,7 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, > struct amdgpu_job *job) > mutex_unlock(&id_mgr->lock); > } > > - if (gds_switch_needed) { > + if (ring->funcs->emit_gds_switch && gds_switch_needed) { > id->gds_base = job->gds_base; > id->gds_size = job->gds_size; > id->gws_base = job->gws_base; > -- > 1.9.1 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
