On Tue, Jul 21, 2009 at 2:56 AM, Steven Noonan<ste...@uplinklabs.net> wrote: > On Mon, Jul 20, 2009 at 10:07 PM, Steven Noonan<ste...@uplinklabs.net> wrote: >> Hi folks, >> >> I'm getting a kernel panic when trying to run the latest git version >> of drm. I built it following the instructions from here: >> http://dri.freedesktop.org/wiki/Building >> >> It's a very very predictable panic. Log in, 'startx', exit X11, and >> then after a couple seconds, panic. >> >> I unfortunately can't get a text version of the panic log, but I do >> have a photo: http://twitpic.com/b2yva >> >> Any ideas? More importantly, am I excluding any important information >> to help debug the issue? > > It turns out that the problem is one of the RADEON_READs in > radeon_get_vblank_counter(). For some reason, the function is being > called after dev_priv->mmio is set to NULL, and when the pointer is > dereferenced, hell breaks loose. > > So what's the proper fix for this? Another assertion with a DRM_ERROR > like the other two in that function, and then a quest to find why > radeon_get_vblank_counter() is called so late? >
I added a DRM_ERROR in radeon_get_vblank_counter() to get past that bomb, and now I'm getting this oops when I unload/reload radeon.ko: [ 345.849948] [drm:drm_init] [ 345.854212] [drm:drm_get_dev] [ 345.856104] pci 0000:01:00.0: setting latency timer to 64 [ 345.858333] [drm:drm_get_minor] [ 345.860426] [drm:drm_get_minor] new minor assigned 0 [ 345.860854] BUG: unable to handle kernel NULL pointer dereference at 0000034c [ 345.860862] IP: [<f8d5112d>] dri_library_name+0x1d/0x80 [radeon] [ 345.860877] *pde = 00000000 [ 345.860882] Oops: 0000 [#1] SMP [ 345.860887] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/dri_library_name [ 345.860892] Modules linked in: radeon(+) drm fuse snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss tun hid_apple snd_hda_codec_idt usbhid appletouch snd_hda_intel ath9k mac80211 snd_hda_codec snd_hwdep snd_pcm uhci_hcd ehci_hcd usbcore ohci1394 snd_timer cfg80211 snd ieee1394 applesmc sky2 hwmon iTCO_wdt soundcore snd_page_alloc [last unloaded: radeon] [ 345.860943] [ 345.860949] Pid: 4713, comm: hald Not tainted (2.6.30.2 #1) MacBookPro2,2 [ 345.860954] EIP: 0060:[<f8d5112d>] EFLAGS: 00010246 CPU: 1 [ 345.860963] EIP is at dri_library_name+0x1d/0x80 [radeon] [ 345.860967] EAX: 00000000 EBX: f8d51110 ECX: 00000000 EDX: f492a000 [ 345.860972] ESI: f8d700e0 EDI: fb570140 EBP: f58d3ee0 ESP: f58d3ecc [ 345.860976] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 345.860982] Process hald (pid: 4713, ti=f58d2000 task=f5b3d820 task.ti=f58d2000) [ 345.860985] Stack: [ 345.860988] 00000001 f58d3edc 00000000 00000000 90dda7c3 f58d3f04 fb570174 00000000 [ 345.861000] c09b0d00 c0355730 f48be134 90dda7c3 fb57c7f4 fffffffb f58d3f1c c05f6da5 [ 345.861012] 90dda7c3 f48be100 f58d3f90 c099c240 f58d3f58 c035578f f58d3f58 c02f3fc4 [ 345.861024] Call Trace: [ 345.861028] [<fb570174>] ? show_dri+0x34/0x80 [drm] [ 345.861049] [<c0355730>] ? sysfs_read_file+0x40/0x150 [ 345.861060] [<c05f6da5>] ? dev_attr_show+0x35/0x70 [ 345.861069] [<c035578f>] ? sysfs_read_file+0x9f/0x150 [ 345.861076] [<c02f3fc4>] ? rw_verify_area+0x74/0x100 [ 345.861085] [<c02f4f23>] ? vfs_read+0xc3/0x1a0 [ 345.861092] [<c03556f0>] ? sysfs_read_file+0x0/0x150 [ 345.861099] [<c02f510d>] ? sys_read+0x5d/0xb0 [ 345.861106] [<c026f996>] ? trace_hardirqs_on_caller+0x26/0x1b0 [ 345.861115] [<c020345b>] ? sysenter_do_call+0x12/0x32 [ 345.861123] Code: ec 4e c7 8d 74 26 00 8d bc 27 00 00 00 00 55 89 e5 83 ec 14 0f 1f 44 00 00 65 8b 0d 14 00 00 00 89 4d fc 31 c9 8b 80 e4 03 00 00 <0f> b7 88 4c 03 00 00 b8 08 a8 d6 f8 83 f9 04 7e 10 83 f9 09 b8 [ 345.861183] EIP: [<f8d5112d>] dri_library_name+0x1d/0x80 [radeon] SS:ESP 0068:f58d3ecc [ 345.861195] CR2: 000000000000034c [ 345.861201] ---[ end trace 1bc685056b5d9e7b ]--- [ 346.020693] [drm:radeon_driver_load] PCIE card detected [ 346.022859] [drm] Initialized radeon 1.29.0 20080613 on minor 0 [ 346.023370] [drm] Used old pci detect: framebuffer loaded And then I tried to unload it, and rmmod hung itself: [ 409.678654] [drm:drm_exit] [ 409.680536] [drm:drm_cleanup] [ 409.682418] [drm:drm_lastclose] [ 409.682424] [drm:radeon_do_cleanup_cp] [ 409.682428] [drm:drm_lastclose] driver lastclose completed [ 409.682435] [drm:drm_lastclose] lastclose completed [ 409.682441] [drm:radeon_driver_unload] [ 409.682455] [drm:drm_put_minor] release secondary minor 0 ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
