<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> The attached patch should fix it.</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Alex</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div id="appendonsend"></div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of Lin, Amber <Amber.Lin@amd.com> Sent: Wednesday, May 8, 2019 4:56 PM To: amd-gfx@lists.freedesktop.org Subject: Kernel crash at reloading amdgpu <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">[CAUTION: External Email] Hi, When I do "rmmod amdgpu; modprobe amdgpu", kernel crashed. This is vega20. What happens is in amdgpu_device_init(): /* check if we need to reset the asic * E.g., driver was not cleanly unloaded previously, etc. */ if (!amdgpu_sriov_vf(adev) && amdgpu_asic_need_reset_on_init(adev)) { r = amdgpu_asic_reset(adev); if (r) { dev_err(adev->dev, "asic reset on init failed\n"); goto failed; } } amdgpu_asic_need_reset_on_init()/soc15_need_reset_on_init() returns true and it goes to amdgpu_asic_reset()/soc15_asic_mode1_reset(), where it calls psp_gpu_reset(): int psp_gpu_reset(struct amdgpu_device *adev) { if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) return 0; return psp_mode1_reset(&adev->psp); } Here, however, psp_mode1_reset is NOT assigned as psp_v11_0_mode1_reset() until amdgpu_device_ip_init(), which is after amdgpu_asic_reset. This null function pointer causes the kernel crash and I have to reboot my system. Does anyone have an idea how to fix this properly? BTW this is the log: [ 157.686303] PGD 0 P4D 0 [ 157.688837] Oops: 0000 [#1] SMP PTI [ 157.692331] CPU: 0 PID: 1902 Comm: kworker/0:2 Tainted: G W 5.0.0-rc1-kfd+ #6 [ 157.700760] Hardware name: ASUS All Series/X99-E WS, BIOS 1302 01/05/2016 [ 157.707543] Workqueue: events work_for_cpu_fn [ 157.711976] RIP: 0010:psp_gpu_reset+0x18/0x30 [amdgpu] [ 157.717106] Code: ff ff ff 5b c3 b8 ea ff ff ff c3 0f 1f 80 00 00 00 00 0f 1f 44 00 00 83 bf c8 22 01 00 02 74 03 31 c0 c3 48 8b 87 c0 23 01 00 <48> 8b 40 50 48 85 c0 74 ed 48 81 c7 88 23 01 00 e9 03 3b 8d d6 0f [ 157.735852] RSP: 0018:ffffaa2544243ce0 EFLAGS: 00010246 [ 157.741077] RAX: 0000000000000000 RBX: ffff97e946f60000 RCX: 0000000000000000 [ 157.748202] RDX: 0000000000000027 RSI: ffffffff976655a0 RDI: ffff97e946f60000 [ 157.755326] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002 [ 157.762459] R10: ffffaa2544243ba0 R11: 38a79ac3ec19edd5 R12: ffff97e946f75088 [ 157.769608] R13: 000000000000000a R14: ffff97e946f75128 R15: 0000000000000001 [ 157.776741] FS: 0000000000000000(0000) GS:ffff97e94f800000(0000) knlGS:0000000000000000 [ 157.784827] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 157.790564] CR2: 0000000000000050 CR3: 00000008083e6003 CR4: 00000000001606f0 [ 157.797696] Call Trace: [ 157.800184] soc15_asic_reset+0x81/0x1f0 [amdgpu] [ 157.804936] amdgpu_device_init+0xcf1/0x1800 [amdgpu] [ 157.809993] ? rcu_read_lock_sched_held+0x74/0x80 [ 157.814734] amdgpu_driver_load_kms+0x65/0x270 [amdgpu] Thanks. Regards, Amber _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org <a href="https://lists.freedesktop.org/mailman/listinfo/amd-gfx">https://lists.freedesktop.org/mailman/listinfo/amd-gfx</a> </div> </div> </body> </html>