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From: Matthew Auld <matthew.auld@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: daniel.vetter@ffwll.ch
Subject: [PATCH 01/22] drm/i915: check for kernel_context
Date: Fri, 27 Sep 2019 18:33:48 +0100	[thread overview]
Message-ID: <20190927173409.31175-2-matthew.auld@intel.com> (raw)
In-Reply-To: <20190927173409.31175-1-matthew.auld@intel.com>

Explosions during early driver init on the error path. Make sure we fail
gracefully.

[ 9547.672258] BUG: kernel NULL pointer dereference, address: 000000000000007c
[ 9547.672288] #PF: supervisor read access in kernel mode
[ 9547.672292] #PF: error_code(0x0000) - not-present page
[ 9547.672296] PGD 8000000846b41067 P4D 8000000846b41067 PUD 797034067 PMD 0
[ 9547.672303] Oops: 0000 [#1] SMP PTI
[ 9547.672307] CPU: 1 PID: 25634 Comm: i915_selftest Tainted: G     U            5.3.0-rc8+ #73
[ 9547.672313] Hardware name:  /NUC6i7KYB, BIOS KYSKLi70.86A.0050.2017.0831.1924 08/31/2017
[ 9547.672395] RIP: 0010:intel_context_unpin+0x9/0x100 [i915]
[ 9547.672400] Code: 6b 60 00 e9 17 ff ff ff bd fc ff ff ff e9 7c ff ff ff 66 66 2e 0f 1f 84 00 00 00 00
 00 0f 1f 40 00 0f 1f 44 00 00 41 54 55 53 <8b> 47 7c 83 f8 01 74 26 8d 48 ff f0 0f b1 4f 7c 48 8d 57 7c
 75 05
[ 9547.672413] RSP: 0018:ffffae8ac24ff878 EFLAGS: 00010246
[ 9547.672417] RAX: ffff944a1b7842d0 RBX: ffff944a1b784000 RCX: ffff944a12dd6fa8
[ 9547.672422] RDX: ffff944a1b7842c0 RSI: ffff944a12dd5328 RDI: 0000000000000000
[ 9547.672428] RBP: 0000000000000000 R08: ffff944a11e5d840 R09: 0000000000000000
[ 9547.672433] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 9547.672438] R13: ffffffffc11aaf00 R14: 00000000ffffffe4 R15: ffff944a0e29bf38
[ 9547.672443] FS:  00007fc259b88ac0(0000) GS:ffff944a1f880000(0000) knlGS:0000000000000000
[ 9547.672449] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9547.672454] CR2: 000000000000007c CR3: 0000000853346003 CR4: 00000000003606e0
[ 9547.672459] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 9547.672464] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 9547.672469] Call Trace:
[ 9547.672518]  intel_engine_cleanup_common+0xe3/0x270 [i915]
[ 9547.672567]  execlists_destroy+0xe/0x30 [i915]
[ 9547.672669]  intel_engines_init+0x94/0xf0 [i915]
[ 9547.672749]  i915_gem_init+0x191/0x950 [i915]

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index f451d5076bde..f97686bdc28b 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -820,8 +820,11 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine)
 	if (engine->default_state)
 		i915_gem_object_put(engine->default_state);
 
-	intel_context_unpin(engine->kernel_context);
-	intel_context_put(engine->kernel_context);
+	if (engine->kernel_context) {
+		intel_context_unpin(engine->kernel_context);
+		intel_context_put(engine->kernel_context);
+	}
+
 	GEM_BUG_ON(!llist_empty(&engine->barrier_tasks));
 
 	intel_wa_list_free(&engine->ctx_wa_list);
-- 
2.20.1

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  reply	other threads:[~2019-09-27 17:34 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-27 17:33 [PATCH 00/22] LMEM basics Matthew Auld
2019-09-27 17:33 ` Matthew Auld [this message]
2019-09-27 17:37   ` [PATCH 01/22] drm/i915: check for kernel_context Chris Wilson
2019-09-27 17:33 ` [PATCH 02/22] drm/i915: simplify i915_gem_init_early Matthew Auld
2019-09-27 17:39   ` Chris Wilson
2019-09-27 17:33 ` [PATCH 03/22] drm/i915: introduce intel_memory_region Matthew Auld
2019-09-27 18:08   ` Chris Wilson
2019-09-27 18:21   ` Chris Wilson
2019-09-27 18:24   ` Chris Wilson
2019-09-27 18:25     ` Chris Wilson
2019-09-27 20:27   ` Chris Wilson
2019-09-27 20:30   ` Chris Wilson
2019-09-27 17:33 ` [PATCH 04/22] drm/i915/region: support continuous allocations Matthew Auld
2019-09-27 18:35   ` Chris Wilson
2019-09-27 18:46   ` Ruhl, Michael J
2019-09-27 17:33 ` [PATCH 05/22] drm/i915/region: support volatile objects Matthew Auld
2019-09-27 17:33 ` [PATCH 06/22] drm/i915: Add memory region information to device_info Matthew Auld
2019-09-27 17:33 ` [PATCH 07/22] drm/i915: support creating LMEM objects Matthew Auld
2019-09-27 18:45   ` Chris Wilson
2019-09-27 17:33 ` [PATCH 08/22] drm/i915: setup io-mapping for LMEM Matthew Auld
2019-09-27 17:33 ` [PATCH 09/22] drm/i915/lmem: support kernel mapping Matthew Auld
2019-09-27 19:24   ` Chris Wilson
2019-09-27 20:39   ` Chris Wilson
2019-09-27 17:33 ` [PATCH 10/22] drm/i915/selftests: add write-dword test for LMEM Matthew Auld
2019-09-27 19:27   ` Chris Wilson
2019-09-27 20:42   ` Chris Wilson
2019-09-30  9:58     ` Matthew Auld
2019-09-30 10:46       ` Chris Wilson
2019-09-27 17:33 ` [PATCH 11/22] drm/i915/selftest: extend coverage to include LMEM huge-pages Matthew Auld
2019-09-27 17:33 ` [PATCH 12/22] drm/i915: enumerate and init each supported region Matthew Auld
2019-09-27 20:44   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 13/22] drm/i915: treat shmem as a region Matthew Auld
2019-09-27 17:34 ` [PATCH 14/22] drm/i915: treat stolen " Matthew Auld
2019-09-27 19:30   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 15/22] drm/i915: define HAS_MAPPABLE_APERTURE Matthew Auld
2019-09-27 17:34 ` [PATCH 16/22] drm/i915: do not map aperture if it is not available Matthew Auld
2019-09-27 17:34 ` [PATCH 17/22] drm/i915: set num_fence_regs to 0 if there is no aperture Matthew Auld
2019-09-27 20:49   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 18/22] drm/i915/selftests: check for missing aperture Matthew Auld
2019-09-27 20:51   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 19/22] drm/i915: error capture with no ggtt slot Matthew Auld
2019-09-27 17:52   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 20/22] drm/i915: Don't try to place HWS in non-existing mappable region Matthew Auld
2019-09-27 17:34 ` [PATCH 21/22] drm/i915: check for missing aperture in GTT pread/pwrite paths Matthew Auld
2019-09-27 17:57   ` Chris Wilson
2019-09-27 17:34 ` [PATCH 22/22] HAX drm/i915: add the fake lmem region Matthew Auld
2019-09-27 18:29 ` ✗ Fi.CI.CHECKPATCH: warning for LMEM basics Patchwork
2019-09-27 18:39 ` ✗ Fi.CI.SPARSE: " Patchwork
2019-09-27 18:51 ` ✓ Fi.CI.BAT: success " Patchwork
2019-09-28  9:47 ` ✗ Fi.CI.IGT: failure " Patchwork

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