/*
 * ciscode.h
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 * (C) 1999		David A. Hinds
 */

#ifndef _LINUX_CISCODE_H
#define _LINUX_CISCODE_H

/* Manufacturer and Product ID codes */

#define MANFID_3COM			0x0101
#define PRODID_3COM_3CXEM556		0x0035
#define PRODID_3COM_3CCFEM556		0x0556
#define PRODID_3COM_3C562		0x0562

#define MANFID_ACCTON			0x01bf
#define PRODID_ACCTON_EN2226		0x010a

#define MANFID_ADAPTEC			0x012f
#define PRODID_ADAPTEC_SCSI		0x0001

#define MANFID_ATT			0xffff
#define PRODID_ATT_KIT			0x0100

#define MANFID_CONTEC			0xc001

#define MANFID_FUJITSU			0x0004
#define PRODID_FUJITSU_MBH10302		0x0004
#define PRODID_FUJITSU_MBH10304		0x1003
#define PRODID_FUJITSU_LA501		0x2000

#define MANFID_IBM			0x00a4
#define PRODID_IBM_HOME_AND_AWAY	0x002e

#define MANFID_INTEL			0x0089
#define PRODID_INTEL_DUAL_RS232		0x0301
#define PRODID_INTEL_2PLUS		0x8422

#define MANFID_KME			0x0032
#define PRODID_KME_KXLC005_A		0x0704
#define PRODID_KME_KXLC005_B		0x2904

#define MANFID_LINKSYS			0x0143
#define PRODID_LINKSYS_PCMLM28		0xc0ab
#define PRODID_LINKSYS_3400		0x3341

#define MANFID_MEGAHERTZ		0x0102
#define PRODID_MEGAHERTZ_VARIOUS	0x0000
#define PRODID_MEGAHERTZ_EM3288		0x0006

#define MANFID_MACNICA			0xc00b

#define MANFID_MOTOROLA			0x0109
#define PRODID_MOTOROLA_MARINER		0x0501

#define MANFID_NATINST			0x010b
#define PRODID_NATINST_QUAD_RS232	0xd180

#define MANFID_NEW_MEDIA		0x0057

#define MANFID_NOKIA			0x0124
#define PRODID_NOKIA_CARDPHONE		0x0900

#define MANFID_OLICOM			0x0121
#define PRODID_OLICOM_OC2231		0x3122
#define PRODID_OLICOM_OC2232		0x3222

#define MANFID_OMEGA			0x0137
#define PRODID_OMEGA_QSP_100		0x0025

#define MANFID_OSITECH			0x0140
#define PRODID_OSITECH_JACK_144		0x0001
#define PRODID_OSITECH_JACK_288		0x0002
#define PRODID_OSITECH_JACK_336		0x0007
#define PRODID_OSITECH_SEVEN		0x0008

#define MANFID_OXSEMI			0x0279

#define MANFID_PIONEER			0x000b

#define MANFID_PSION			0x016c
#define PRODID_PSION_NET100		0x0023

#define MANFID_QUATECH			0x0137
#define PRODID_QUATECH_SPP100		0x0003
#define PRODID_QUATECH_DUAL_RS232	0x0012
#define PRODID_QUATECH_DUAL_RS232_D1	0x0007
#define PRODID_QUATECH_DUAL_RS232_D2	0x0052
#define PRODID_QUATECH_DUAL_RS232_G	0x004d
#define PRODID_QUATECH_QUAD_RS232	0x001b
#define PRODID_QUATECH_DUAL_RS422	0x000e
#define PRODID_QUATECH_QUAD_RS422	0x0045

#define MANFID_SMC			0x0108
#define PRODID_SMC_ETHER		0x0105

#define MANFID_SOCKET			0x0104
#define PRODID_SOCKET_DUAL_RS232	0x0006
#define PRODID_SOCKET_EIO		0x000a
#define PRODID_SOCKET_LPE		0x000d
#define PRODID_SOCKET_LPE_CF		0x0075

#define MANFID_SUNDISK			0x0045

#define MANFID_TDK			0x0105
#define PRODID_TDK_CF010		0x0900
#define PRODID_TDK_NP9610		0x0d0a
#define PRODID_TDK_MN3200		0x0e0a
#define PRODID_TDK_GN3410		0x4815

#define MANFID_TOSHIBA			0x0098

#define MANFID_UNGERMANN		0x02c0

#define MANFID_XIRCOM			0x0105

#define MANFID_POSSIO			0x030c
#define PRODID_POSSIO_GCC		0x0003

#define MANFID_NEC			0x0010

#endif /* _LINUX_CISCODE_H */
ild</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/build/feature?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>feature</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/build/feature/test-bpf.c?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>test-bpf.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='39cb2c9a316e77f6dfba96c543e55b6672d5a37e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-29 13:50:06 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-29 13:50:06 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/build/feature/test-bpf.c?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>39cb2c9a316e77f6dfba96c543e55b6672d5a37e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/build/feature/test-bpf.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>98fe974ee4e20121253de7f61fc8d01bdb3821c1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/build/feature/test-bpf.c?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>tools/build/feature/test-bpf.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/build/feature/test-bpf.c?h=nds-private-remove&amp;id=2c5d9555d6d937966d79d4c6529a5f7b9206e405'>2c5d9555d6d937966d79d4c6529a5f7b9206e405</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/build/feature/test-bpf.c?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e&amp;id2=2c5d9555d6d937966d79d4c6529a5f7b9206e405'>diff</a>)</td></tr></table>
<div class='commit-subject'>drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()</div><div class='commit-msg'>I've seen this trigger twice now, where the i915_gem_object_to_ggtt()
call in intel_unpin_fb_obj() returns NULL, resulting in an oops
immediately afterwards as the (inlined) call to i915_vma_unpin_fence()
tries to dereference it.

It seems to be some race condition where the object is going away at
shutdown time, since both times happened when shutting down the X
server.  The call chains were different:

 - VT ioctl(KDSETMODE, KD_TEXT):

    intel_cleanup_plane_fb+0x5b/0xa0 [i915]
    drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper]
    intel_atomic_commit_tail+0x749/0xfe0 [i915]
    intel_atomic_commit+0x3cb/0x4f0 [i915]
    drm_atomic_commit+0x4b/0x50 [drm]
    restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper]
    drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper]
    drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
    intel_fbdev_set_par+0x18/0x70 [i915]
    fb_set_var+0x236/0x460
    fbcon_blank+0x30f/0x350
    do_unblank_screen+0xd2/0x1a0
    vt_ioctl+0x507/0x12a0
    tty_ioctl+0x355/0xc30
    do_vfs_ioctl+0xa3/0x5e0
    SyS_ioctl+0x79/0x90
    entry_SYSCALL_64_fastpath+0x13/0x94

 - i915 unpin_work workqueue:

    intel_unpin_work_fn+0x58/0x140 [i915]
    process_one_work+0x1f1/0x480
    worker_thread+0x48/0x4d0
    kthread+0x101/0x140

and this patch purely papers over the issue by adding a NULL pointer
check and a WARN_ON_ONCE() to avoid the oops that would then generally
make the machine unresponsive.

Other callers of i915_gem_object_to_ggtt() seem to also check for the
returned pointer being NULL and warn about it, so this clearly has
happened before in other places.

[ Reported it originally to the i915 developers on Jan 8, applying the
  ugly workaround on my own now after triggering the problem for the
  second time with no feedback.

  This is likely to be the same bug reported as

     https://bugs.freedesktop.org/show_bug.cgi?id=98829
     https://bugs.freedesktop.org/show_bug.cgi?id=99134

  which has a patch for the underlying problem, but it hasn't gotten to
  me, so I'm applying the workaround. ]

Cc: Daniel Vetter &lt;daniel.vetter@intel.com&gt;
Cc: Jani Nikula &lt;jani.nikula@linux.intel.com&gt;
Cc: Ville Syrjälä &lt;ville.syrjala@linux.intel.com&gt;
Cc: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Maarten Lankhorst &lt;maarten.lankhorst@linux.intel.com&gt;
Cc: Tvrtko Ursulin &lt;tvrtko.ursulin@intel.com&gt;
Cc: Imre Deak &lt;imre.deak@intel.com&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>Diffstat</a> (limited to 'tools/build/feature/test-bpf.c')</div><table summary='diffstat' class='diffstat'>