Re: [drm:qxl] BUG: sleeping function called from invalid context - qxl_bo_kmap_atomic_page()...splat

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On Mon, 2017-05-08 at 16:48 -0300, Gabriel Krisman Bertazi wrote:

> Thanks for reporting this.  Can you confirm the following patch prevents
> the issue?

Nope, it still gripes.

[   43.910362] BUG: sleeping function called from invalid context at mm/slab.h:432
[   43.910955] in_atomic(): 1, irqs_disabled(): 0, pid: 2077, name: Xorg
[   43.911472] Preemption disabled at:
[   43.911478] [<ffffffffa02b1c45>] qxl_bo_kmap_atomic_page+0xa5/0x100 [qxl]
[   43.912103] CPU: 0 PID: 2077 Comm: Xorg Tainted: G            E   4.12.0-master #38
[   43.912550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20161202_174313-build11a 04/01/2014
[   43.913202] Call Trace:
[   43.913371]  dump_stack+0x65/0x89
[   43.913581]  ? qxl_bo_kmap_atomic_page+0xa5/0x100 [qxl]
[   43.913876]  ___might_sleep+0x11a/0x190
[   43.914095]  __might_sleep+0x4a/0x80
[   43.914319]  ? qxl_bo_create+0x50/0x190 [qxl]
[   43.914565]  kmem_cache_alloc_trace+0x46/0x180
[   43.914836]  qxl_bo_create+0x50/0x190 [qxl]
[   43.915082]  ? refcount_dec_and_test+0x11/0x20
[   43.915332]  ? ttm_mem_io_reserve+0x41/0xe0 [ttm]
[   43.915595]  qxl_alloc_bo_reserved+0x37/0xb0 [qxl]
[   43.915884]  qxl_cursor_atomic_update+0x8f/0x260 [qxl]
[   43.916172]  ? drm_atomic_helper_update_legacy_modeset_state+0x1d6/0x210 [drm_kms_helper]
[   43.916623]  drm_atomic_helper_commit_planes+0xec/0x230 [drm_kms_helper]
[   43.916995]  drm_atomic_helper_commit_tail+0x2b/0x60 [drm_kms_helper]
[   43.917398]  commit_tail+0x65/0x70 [drm_kms_helper]
[   43.917693]  drm_atomic_helper_commit+0xa9/0x100 [drm_kms_helper]
[   43.918039]  drm_atomic_commit+0x4b/0x50 [drm]
[   43.918334]  drm_atomic_helper_update_plane+0xf1/0x110 [drm_kms_helper]
[   43.918902]  __setplane_internal+0x19f/0x280 [drm]
[   43.919240]  drm_mode_cursor_universal+0x101/0x1c0 [drm]
[   43.919541]  drm_mode_cursor_common+0x15b/0x1d0 [drm]
[   43.919858]  drm_mode_cursor2_ioctl+0xe/0x10 [drm]
[   43.920157]  drm_ioctl+0x211/0x460 [drm]
[   43.920383]  ? drm_mode_cursor_ioctl+0x50/0x50 [drm]
[   43.920664]  ? handle_mm_fault+0x93/0x160
[   43.920893]  do_vfs_ioctl+0x96/0x6e0
[   43.921117]  ? __fget+0x73/0xa0
[   43.921322]  SyS_ioctl+0x41/0x70
[   43.921545]  entry_SYSCALL_64_fastpath+0x1a/0xa5
[   43.922188] RIP: 0033:0x7f1145804bc7
[   43.922526] RSP: 002b:00007ffcd3e50508 EFLAGS: 00003246 ORIG_RAX: 0000000000000010
[   43.923367] RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007f1145804bc7
[   43.923852] RDX: 00007ffcd3e50540 RSI: 00000000c02464bb RDI: 000000000000000b
[   43.924299] RBP: 0000000000000040 R08: 0000000000000040 R09: 000000000000000c
[   43.924694] R10: 00007ffcd3e50340 R11: 0000000000003246 R12: 0000000000000018
[   43.925128] R13: 00000000022bc390 R14: 0000000000000040 R15: 00007ffcd3e5062c
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