(This is possibly a dup of 25747) Bug: when i append "radeon.benchmark=1" the kernel oopses System is Arch linux, kernel version 3.8.2-1-ARCH, hardware is Radeon HD 7950 Log: Mar 12 15:51:01 yennork kernel: [ 1.992473] [drm] initializing kernel modesetting (TAHITI 0x1002:0x679A 0x1458:0x254C). Mar 12 15:51:01 yennork kernel: [ 2.694236] [drm] radeon: dma 1024 bo moves of 1024 kB from 2 to 4 in 253 ms, throughput: 33152 Mb/s or 4144 MB/s Mar 12 15:51:01 yennork kernel: [ 2.694260] BUG: unable to handle kernel NULL pointer dereference at (null) Mar 12 15:51:01 yennork kernel: [ 2.694375] IP: [< (null)>] (null) Mar 12 15:51:01 yennork kernel: [ 2.694450] PGD 41bf9a067 PUD 41bf9b067 PMD 0 Mar 12 15:51:01 yennork kernel: [ 2.694586] Oops: 0010 [#1] PREEMPT SMP Mar 12 15:51:01 yennork kernel: [ 2.694721] Modules linked in: hid_generic usbhid hid mxm_wmi evdev radeon(+) snd_hda_codec_realtek fam15h_power snd_hda_intel(+) ttm snd_hda_codec drm_kms_helper snd_hwdep drm snd_pcm snd_page_alloc r8169 snd_timer snd i2c_algo_bit soundcore i2c_core mii nfs lockd sunrpc fscache wmi button microcode kvm_amd kvm fuse acpi_cpufreq mperf processor ext4 crc16 jbd2 mbcache dm_crypt dm_mod sr_mod cdrom sd_mod crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 xts lrw gf128mul ablk_helper cryptd ahci libahci ehci_pci ohci_hcd xhci_hcd ehci_hcd libata usbcore scsi_mod usb_common pci_stub Mar 12 15:51:01 yennork kernel: [ 2.696915] CPU 4 Mar 12 15:51:01 yennork kernel: [ 2.696953] Pid: 244, comm: systemd-udevd Not tainted 3.8.2-1-ARCH #1 Gigabyte Technology Co., Ltd. GA-990XA-UD3/GA-990XA-UD3 Mar 12 15:51:01 yennork kernel: [ 2.697041] RIP: 0010:[<0000000000000000>] [< (null)>] (null) Mar 12 15:51:01 yennork kernel: [ 2.697121] RSP: 0018:ffff88041bff3940 EFLAGS: 00010246 Mar 12 15:51:01 yennork kernel: [ 2.697164] RAX: ffffffffa04d3380 RBX: 0000000000000400 RCX: 0000000000000100 Mar 12 15:51:01 yennork kernel: [ 2.697210] RDX: 000000000114b000 RSI: 00000000c0431000 RDI: ffff88041c1ac000 Mar 12 15:51:01 yennork kernel: [ 2.697255] RBP: ffff88041bff39a8 R08: ffff88041bff3970 R09: 000000000000034d Mar 12 15:51:01 yennork kernel: [ 2.697300] R10: 0000000000000000 R11: 000000000000034c R12: 0000000000000001 Mar 12 15:51:01 yennork kernel: [ 2.697345] R13: ffff88041c1ac000 R14: 0000000000000100 R15: 00000000c0431000 Mar 12 15:51:01 yennork kernel: [ 2.697391] FS: 00007fec84a54780(0000) GS:ffff88042ed00000(0000) knlGS:0000000000000000 Mar 12 15:51:01 yennork kernel: [ 2.697440] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Mar 12 15:51:01 yennork kernel: [ 2.697484] CR2: 0000000000000000 CR3: 000000041bf99000 CR4: 00000000000407e0 Mar 12 15:51:01 yennork kernel: [ 2.697529] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Mar 12 15:51:01 yennork kernel: [ 2.697574] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Mar 12 15:51:01 yennork kernel: [ 2.697621] Process systemd-udevd (pid: 244, threadinfo ffff88041bff2000, task ffff88041a1110c0) Mar 12 15:51:01 yennork kernel: [ 2.697670] Stack: Mar 12 15:51:01 yennork kernel: [ 2.697707] ffffffffa0454a26 ffff88041bff39a8 ffffffff814ca2cb 00000000fffea35a Mar 12 15:51:01 yennork kernel: [ 2.697881] 000000000114b000 ffff88041bff39d0 0000000000000000 ffff88041bff39f0 Mar 12 15:51:01 yennork kernel: [ 2.698054] ffff88041bff39f0 0000000000000002 ffff88041c1ac000 0000000000100000 Mar 12 15:51:01 yennork kernel: [ 2.698227] Call Trace: Mar 12 15:51:01 yennork kernel: [ 2.698319] [<ffffffffa0454a26>] ? radeon_benchmark_do_move.constprop.1+0xf6/0x120 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698375] [<ffffffff814ca2cb>] ? printk+0x4d/0x4f Mar 12 15:51:01 yennork kernel: [ 2.698464] [<ffffffffa0454c9e>] radeon_benchmark_move+0x24e/0x2b0 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698555] [<ffffffffa0454e14>] radeon_benchmark+0x114/0x2a0 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698637] [<ffffffffa0424bc1>] radeon_device_init+0x601/0x670 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698720] [<ffffffffa042665d>] radeon_driver_load_kms+0x9d/0x1a0 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698776] [<ffffffffa039b976>] drm_get_pci_dev+0x186/0x2c0 [drm] Mar 12 15:51:01 yennork kernel: [ 2.698855] [<ffffffffa040c1d4>] radeon_pci_probe+0xb4/0xf0 [radeon] Mar 12 15:51:01 yennork kernel: [ 2.698904] [<ffffffff8129f7eb>] local_pci_probe+0x4b/0x80 Mar 12 15:51:01 yennork kernel: [ 2.698950] [<ffffffff812a00b1>] pci_device_probe+0x111/0x120 Mar 12 15:51:01 yennork kernel: [ 2.698999] [<ffffffff8135a41b>] driver_probe_device+0x8b/0x3a0 Mar 12 15:51:01 yennork kernel: [ 2.699046] [<ffffffff8135a7db>] __driver_attach+0xab/0xb0 Mar 12 15:51:01 yennork kernel: [ 2.699092] [<ffffffff8135a730>] ? driver_probe_device+0x3a0/0x3a0 Mar 12 15:51:01 yennork kernel: [ 2.699138] [<ffffffff8135844d>] bus_for_each_dev+0x5d/0xa0 Mar 12 15:51:01 yennork kernel: [ 2.699185] [<ffffffff81359e8e>] driver_attach+0x1e/0x20 Mar 12 15:51:01 yennork kernel: [ 2.699230] [<ffffffff813599b0>] bus_add_driver+0x1a0/0x290
Created attachment 76410 [details] [review] possible fix This patch should fix the issue.
Built 3.8.2 with the patch, verified its working. Thanks!
A patch referencing this bug report has been merged in Linux v3.9-rc4: commit fa8d387dc3f62062a6b4afbbb2a3438094fd8584 Author: Alex Deucher <alexander.deucher@amd.com> Date: Tue Mar 12 12:53:13 2013 -0400 drm/radeon/benchmark: make sure bo blit copy exists before using it
Resolving per comment #3.
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