From d2790e10d3c39cd36f4e1661701f49f237c06c1a Mon Sep 17 00:00:00 2001 From: Yintian Tao Date: Thu, 27 Feb 2020 16:53:34 +0800 Subject: drm/amdgpu: no need to clean debugfs at amdgpu drm_minor_unregister will invoke drm_debugfs_cleanup to clean all the child node under primary minor node. We don't need to invoke amdgpu_debugfs_fini and amdgpu_debugfs_regs_cleanup to clean agian. Otherwise, it will raise the NULL pointer like below. [ 45.046029] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 [ 45.047256] PGD 0 P4D 0 [ 45.047713] Oops: 0002 [#1] SMP PTI [ 45.048198] CPU: 0 PID: 2796 Comm: modprobe Tainted: G W OE 4.18.0-15-generic #16~18.04.1-Ubuntu [ 45.049538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.050651] RIP: 0010:down_write+0x1f/0x40 [ 45.051194] Code: 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 ce d9 ff ff 48 ba 01 00 00 00 ff ff ff ff 48 89 d8 48 0f c1 10 85 d2 74 05 e8 53 1c ff ff 65 48 8b 04 25 00 5c 01 [ 45.053702] RSP: 0018:ffffad8f4133fd40 EFLAGS: 00010246 [ 45.054384] RAX: 00000000000000a8 RBX: 00000000000000a8 RCX: ffffa011327dd814 [ 45.055349] RDX: ffffffff00000001 RSI: 0000000000000001 RDI: 00000000000000a8 [ 45.056346] RBP: ffffad8f4133fd48 R08: 0000000000000000 R09: ffffffffc0690a00 [ 45.057326] R10: ffffad8f4133fd58 R11: 0000000000000001 R12: ffffa0113cff0300 [ 45.058266] R13: ffffa0113c0a0000 R14: ffffffffc0c02a10 R15: ffffa0113e5c7860 [ 45.059221] FS: 00007f60d46f9540(0000) GS:ffffa0113fc00000(0000) knlGS:0000000000000000 [ 45.060809] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.061826] CR2: 00000000000000a8 CR3: 0000000136250004 CR4: 00000000003606f0 [ 45.062913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.064404] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.065897] Call Trace: [ 45.066426] debugfs_remove+0x36/0xa0 [ 45.067131] amdgpu_debugfs_ring_fini+0x15/0x20 [amdgpu] [ 45.068019] amdgpu_debugfs_fini+0x2c/0x50 [amdgpu] [ 45.068756] amdgpu_pci_remove+0x49/0x70 [amdgpu] [ 45.069439] pci_device_remove+0x3e/0xc0 [ 45.070037] device_release_driver_internal+0x18a/0x260 [ 45.070842] driver_detach+0x3f/0x80 [ 45.071325] bus_remove_driver+0x59/0xd0 [ 45.071850] driver_unregister+0x2c/0x40 [ 45.072377] pci_unregister_driver+0x22/0xa0 [ 45.073043] amdgpu_exit+0x15/0x57c [amdgpu] [ 45.073683] __x64_sys_delete_module+0x146/0x280 [ 45.074369] do_syscall_64+0x5a/0x120 [ 45.074916] entry_SYSCALL_64_after_hwframe+0x44/0xa9 v2: remove all debugfs cleanup/fini code at amdgpu v3: squash in unused variable removal Signed-off-by: Yintian Tao Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 18e11b0fdc3e..ca6b52054b4b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -499,13 +499,6 @@ int amdgpu_debugfs_ring_init(struct amdgpu_device *adev, return 0; } -void amdgpu_debugfs_ring_fini(struct amdgpu_ring *ring) -{ -#if defined(CONFIG_DEBUG_FS) - debugfs_remove(ring->ent); -#endif -} - /** * amdgpu_ring_test_helper - tests ring and set sched readiness status * -- cgit v1.2.3 From 552b80d7409da11f344cdd0bced62e6d9375f3fb Mon Sep 17 00:00:00 2001 From: Nirmoy Das Date: Thu, 27 Feb 2020 18:26:15 +0100 Subject: drm/amdgpu: remove unused functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit AMDGPU statically sets priority for compute queues at initialization so remove all the functions responsible for changing compute queue priority dynamically. Signed-off-by: Nirmoy Das Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 70 -------------------------------- 1 file changed, 70 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index ca6b52054b4b..a7e1d0425ed0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -150,76 +150,6 @@ void amdgpu_ring_undo(struct amdgpu_ring *ring) ring->funcs->end_use(ring); } -/** - * amdgpu_ring_priority_put - restore a ring's priority - * - * @ring: amdgpu_ring structure holding the information - * @priority: target priority - * - * Release a request for executing at @priority - */ -void amdgpu_ring_priority_put(struct amdgpu_ring *ring, - enum drm_sched_priority priority) -{ - int i; - - if (!ring->funcs->set_priority) - return; - - if (atomic_dec_return(&ring->num_jobs[priority]) > 0) - return; - - /* no need to restore if the job is already at the lowest priority */ - if (priority == DRM_SCHED_PRIORITY_NORMAL) - return; - - mutex_lock(&ring->priority_mutex); - /* something higher prio is executing, no need to decay */ - if (ring->priority > priority) - goto out_unlock; - - /* decay priority to the next level with a job available */ - for (i = priority; i >= DRM_SCHED_PRIORITY_MIN; i--) { - if (i == DRM_SCHED_PRIORITY_NORMAL - || atomic_read(&ring->num_jobs[i])) { - ring->priority = i; - ring->funcs->set_priority(ring, i); - break; - } - } - -out_unlock: - mutex_unlock(&ring->priority_mutex); -} - -/** - * amdgpu_ring_priority_get - change the ring's priority - * - * @ring: amdgpu_ring structure holding the information - * @priority: target priority - * - * Request a ring's priority to be raised to @priority (refcounted). - */ -void amdgpu_ring_priority_get(struct amdgpu_ring *ring, - enum drm_sched_priority priority) -{ - if (!ring->funcs->set_priority) - return; - - if (atomic_inc_return(&ring->num_jobs[priority]) <= 0) - return; - - mutex_lock(&ring->priority_mutex); - if (priority <= ring->priority) - goto out_unlock; - - ring->priority = priority; - ring->funcs->set_priority(ring, priority); - -out_unlock: - mutex_unlock(&ring->priority_mutex); -} - /** * amdgpu_ring_init - init driver ring struct. * -- cgit v1.2.3