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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I find the below WARN_ON() message while rendering on eDP in ST platform with
<a href="https://cgit.freedesktop.org/~airlied/linux/log/?h=drm-next-amd-dc-staging">
https://cgit.freedesktop.org/~airlied/linux/log/?h=drm-next-amd-dc-staging</a> branch:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159552] WARNING: CPU: 1 PID: 899 at /mnt/host/source/src/third_party/kernel/v4.12/drivers/gpu/drm/ttm/ttm_bo_<o:p></o:p></p>
<p class="MsoNormal">vm.c:287 ttm_bo_vm_open+0x2b/0x38<o:p></o:p></p>
<p class="MsoNormal">[ 344.159552] Modules linked in: ccm cmac rfcomm uinput rtsx_pci_sdmmc xt_nat lzo lzo_compress ath10k_pci ath10k_co<o:p></o:p></p>
<p class="MsoNormal">re i2c_piix4 mac80211 zram bridge designware_i2s stp ath rtsx_pci llc acpi_als ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat fuse xt_mark cfg8<o:p></o:p></p>
<p class="MsoNormal">0211 ip6table_filter iio_trig_sysfs cros_ec_sensors industrialio_triggered_buffer kfifo_buf cros_ec_sensors_core industrialio ax88179_178a usbnet mii btusb btrtl btb<o:p></o:p></p>
<p class="MsoNormal">cm btintel bluetooth ecdh_generic joydev uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159594] CPU: 1 PID: 899 Comm: TaskSchedulerSi Tainted: G W 4.14.0-00021-g4448b9a68413 #467<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159595] Hardware name: Google Kahlee/Kahlee, BIOS Google_Kahlee.10122.0.0 11/10/2017<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159597] task: ffff967e1f750000 task.stack: ffffa4aa00d78000<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159600] RIP: 0010:ttm_bo_vm_open+0x2b/0x38<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159602] RSP: 0018:ffffa4aa00d7bdb0 EFLAGS: 00010202<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159605] RAX: ffff967d6505e858 RBX: ffff967da2415100 RCX: ffff967e2a3b2830<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159606] RDX: ffff967da679bb40 RSI: ffff967e29f39510 RDI: ffff967d653682e0<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159608] RBP: ffffa4aa00d7bdb0 R08: ffffffff87932194 R09: 0000000000000000<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159610] R10: 000000000001e1b1 R11: 000000000001e168 R12: ffff967da6789d00<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159611] R13: ffff967e274e3b80 R14: ffff967d653682e0 R15: 0000000000000000<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159614] FS: 00007ddd0559a700(0000) GS:ffff967e2ed00000(0000) knlGS:0000000000000000<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159616] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159618] CR2: 0000162eb0bebb18 CR3: 000000012133e000 CR4: 00000000001406e0<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159619] Call Trace:<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159623] copy_process.part.49+0xf47/0x186e<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159627] _do_fork+0xcd/0x2d1<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159631] ? __might_fault+0x35/0x37<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159634] ? _copy_to_user+0x5e/0x6b<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159637] SyS_clone+0x19/0x1b<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159639] do_syscall_64+0x52/0x61<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159642] entry_SYSCALL64_slow_path+0x25/0x25<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159644] RIP: 0033:0x7ddd1224be3a<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159646] RSP: 002b:00007ddd05598ce0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159649] RAX: ffffffffffffffda RBX: 00007ddd05598ce0 RCX: 00007ddd1224be3a<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159651] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159652] RBP: 00007ddd05598d50 R08: 00000000000002e0 R09: 0000000000000383<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159654] R10: 00007ddd0559a9d0 R11: 0000000000000246 R12: 0000000000000000<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159656] R13: 00007ddd05598d00 R14: 00007ddd05598f01 R15: 0000162eb3b438a0<o:p></o:p></p>
<p class="MsoNormal">WARNING kernel: [ 344.159658] Code: 0f 1f 44 00 00 55 48 8b 87 a8 00 00 00 48 8b 97 a0 00 00 00 48 89 e5 48 8b 48 08 48 8b b2 30 01<o:p></o:p></p>
<p class="MsoNormal">00 00 48 39 b1 68 08 00 00 74 02 <0f> ff 48 8d 78 30 e8 59 ff ff ff 5d c3 0f 1f 44 00 00 55 48 89<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anybody know the fix for it?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Shirish S<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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