[Bug 105051] circular locking,

[Bug 105051] circular locking,

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

            Bug ID: 105051
           Summary: circular locking,
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/other
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bugzilla@colorremedies.com

4.16.0-0.rc0.git9.1.fc28.x86_64 which is "linux-next" git f9f1e414128e

[    9.523799] switcheroo-cont/889 is trying to acquire lock:
[    9.523799]  (console_lock){+.+.}, at: [<000000002c1cc7fb>]
vga_switchto_stage2+0x93/0x130
[    9.523806] 
               but task is already holding lock:
[    9.523807]  (vgasr_mutex){+.+.}, at: [<000000007e504e29>]
vga_switcheroo_debugfs_write+0x6b/0x360
[    9.523810] 
               which lock already depends on the new lock.

[    9.523810] 
               the existing dependency chain (in reverse order) is:
[    9.523810] 
               -> #3 (vgasr_mutex){+.+.}:
[    9.523812] 
               -> #2 (&helper->lock){+.+.}:
[    9.523814] 
               -> #1 ((fb_notifier_list).rwsem){++++}:
[    9.523816] 
               -> #0 (console_lock){+.+.}:
[    9.523818] 
               other info that might help us debug this:

[    9.523818] Chain exists of:
                 console_lock --> &helper->lock --> vgasr_mutex

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

bugzilla@colorremedies.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|circular locking,           |circular locking,
                   |                            |switcheroo-cont/889 is
                   |                            |trying to acquire lock
                   |                            |vga_switchto_stage2, but
                   |                            |vga_switcheroo_debugfs_writ
                   |                            |e already has lock

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

--- Comment #1 from bugzilla@colorremedies.com ---
Created attachment 137286
  --> https://bugs.freedesktop.org/attachment.cgi?id=137286&action=edit
dmesg.log

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

--- Comment #2 from bugzilla@colorremedies.com ---
Created attachment 137287
  --> https://bugs.freedesktop.org/attachment.cgi?id=137287&action=edit
journalctl -b -o short-monotonic

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

--- Comment #3 from bugzilla@colorremedies.com ---
Created attachment 137288
  --> https://bugs.freedesktop.org/attachment.cgi?id=137288&action=edit
lspci -vvnn

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

--- Comment #4 from bugzilla@colorremedies.com ---
Created attachment 137289
  --> https://bugs.freedesktop.org/attachment.cgi?id=137289&action=edit
dmidecode

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

--- Comment #5 from bugzilla@colorremedies.com ---
Still happens in 4.16.0-0.rc4.git3.1.fc29.x86_64 which is git 1b88accf6a65.

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[Bug 105051] circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock

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https://bugs.freedesktop.org/show_bug.cgi?id=105051

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #6 from Martin Peres <martin.peres@free.fr> ---
Hi,

Freedesktop's Bugzilla instance is EOLed and open bugs are about to be migrated
to http://gitlab.freedesktop.org.

To avoid migrating out of date bugs, I am now closing all the bugs that did not
see any activity in the past year. If the issue is still happening, please
create a new bug in the relevant project at https://gitlab.freedesktop.org/drm
(use misc by default).

Sorry about the noise!

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