/*
 * test-all.c: Try to build all the main testcases at once.
 *
 * A well-configured system will have all the prereqs installed, so we can speed
 * up auto-detection on such systems.
 */

/*
 * Quirk: Python and Perl headers cannot be in arbitrary places, so keep
 * these 3 testcases at the top:
 */
#define main main_test_libpython
# include "test-libpython.c"
#undef main

#define main main_test_libpython_version
# include "test-libpython-version.c"
#undef main

#define main main_test_libperl
# include "test-libperl.c"
#undef main

#define main main_test_hello
# include "test-hello.c"
#undef main

#define main main_test_libelf
# include "test-libelf.c"
#undef main

#define main main_test_libelf_mmap
# include "test-libelf-mmap.c"
#undef main

#define main main_test_glibc
# include "test-glibc.c"
#undef main

#define main main_test_dwarf
# include "test-dwarf.c"
#undef main

#define main main_test_dwarf_getlocations
# include "test-dwarf_getlocations.c"
#undef main

#define main main_test_libelf_getphdrnum
# include "test-libelf-getphdrnum.c"
#undef main

#define main main_test_libelf_gelf_getnote
# include "test-libelf-gelf_getnote.c"
#undef main

#define main main_test_libelf_getshdrstrndx
# include "test-libelf-getshdrstrndx.c"
#undef main

#define main main_test_libunwind
# include "test-libunwind.c"
#undef main

#define main main_test_libaudit
# include "test-libaudit.c"
#undef main

#define main main_test_libslang
# include "test-libslang.c"
#undef main

#define main main_test_gtk2
# include "test-gtk2.c"
#undef main

#define main main_test_gtk2_infobar
# include "test-gtk2-infobar.c"
#undef main

#define main main_test_libbfd
# include "test-libbfd.c"
#undef main

#define main main_test_backtrace
# include "test-backtrace.c"
#undef main

#define main main_test_libnuma
# include "test-libnuma.c"
#undef main

#define main main_test_numa_num_possible_cpus
# include "test-numa_num_possible_cpus.c"
#undef main

#define main main_test_timerfd
# include "test-timerfd.c"
#undef main

#define main main_test_stackprotector_all
# include "test-stackprotector-all.c"
#undef main

#define main main_test_libdw_dwarf_unwind
# include "test-libdw-dwarf-unwind.c"
#undef main

#define main main_test_sync_compare_and_swap
# include "test-sync-compare-and-swap.c"
#undef main

#define main main_test_zlib
# include "test-zlib.c"
#undef main

#define main main_test_pthread_attr_setaffinity_np
# include "test-pthread-attr-setaffinity-np.c"
#undef main

# if 0
/*
 * Disable libbabeltrace check for test-all, because the requested
 * library version is not released yet in most distributions. Will
 * reenable later.
 */

#define main main_test_libbabeltrace
# include "test-libbabeltrace.c"
#undef main
#endif

#define main main_test_lzma
# include "test-lzma.c"
#undef main

#define main main_test_get_cpuid
# include "test-get_cpuid.c"
#undef main

#define main main_test_bpf
# include "test-bpf.c"
#undef main

#define main main_test_libcrypto
# include "test-libcrypto.c"
#undef main

#define main main_test_sdt
# include "test-sdt.c"
#undef main

int main(int argc, char *argv[])
{
	main_test_libpython();
	main_test_libpython_version();
	main_test_libperl();
	main_test_hello();
	main_test_libelf();
	main_test_libelf_mmap();
	main_test_glibc();
	main_test_dwarf();
	main_test_dwarf_getlocations();
	main_test_libelf_getphdrnum();
	main_test_libelf_gelf_getnote();
	main_test_libelf_getshdrstrndx();
	main_test_libunwind();
	main_test_libaudit();
	main_test_libslang();
	main_test_gtk2(argc, argv);
	main_test_gtk2_infobar(argc, argv);
	main_test_libbfd();
	main_test_backtrace();
	main_test_libnuma();
	main_test_numa_num_possible_cpus();
	main_test_timerfd();
	main_test_stackprotector_all();
	main_test_libdw_dwarf_unwind();
	main_test_sync_compare_and_swap(argc, argv);
	main_test_zlib();
	main_test_pthread_attr_setaffinity_np();
	main_test_lzma();
	main_test_get_cpuid();
	main_test_bpf();
	main_test_libcrypto();
	main_test_sdt();

	return 0;
}
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/net/wireless/wext-priv.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>39cb2c9a316e77f6dfba96c543e55b6672d5a37e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/wireless/wext-priv.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/?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>98fe974ee4e20121253de7f61fc8d01bdb3821c1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/wireless/wext-priv.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>net/wireless/wext-priv.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/wireless/wext-priv.c?id=2c5d9555d6d937966d79d4c6529a5f7b9206e405'>2c5d9555d6d937966d79d4c6529a5f7b9206e405</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/wireless/wext-priv.c?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/?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>Diffstat</a> (limited to 'net/wireless/wext-priv.c')</div><table summary='diffstat' class='diffstat'>