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| author |   John Harrison <John.C.Harrison@Intel.com> | 2014-12-05 13:49:34 +0000 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-12-06 01:46:26 +0100 |
| commit | aaeb1ba041aedf2b58cd1303fd5fa9cf9173fa9b (patch) | |
| tree | 55089db644192712aee5e63751a387dc2ee473cb /drivers/gpu/drm/i915/intel_lrc.c | |
| parent | drm/i915: Fix up seqno -> request merge issues (diff) | |
| download | linux-dev-aaeb1ba041aedf2b58cd1303fd5fa9cf9173fa9b.tar.xz linux-dev-aaeb1ba041aedf2b58cd1303fd5fa9cf9173fa9b.zip | |
drm/i915: Zero fill the request structure
There is a general theory that kzmalloc is better/safer than kmalloc, especially
for interesting data structures. This change updates the request structure
allocation to be zero filled.
This also fixes crashes in the reset code. Quoting Mika's patch:
"Clean the request structure on alloc. Otherwise we might end up
referencing uninitialized fields. This is apparent when we try to
cleanup the preallocated request on ring reset, before any request has
been submitted to the ring. The request->ctx is foobar and we end up
freeing the foobarness."
Note that this fixes a regression introduced in
commit 9eba5d4a1d79d5094321469479b4dbe418f60110
Author: John Harrison <John.C.Harrison@Intel.com>
Date: Mon Nov 24 18:49:23 2014 +0000
drm/i915: Ensure OLS & PLR are always in sync
References: https://bugs.freedesktop.org/show_bug.cgi?id=86959
References: https://bugs.freedesktop.org/show_bug.cgi?id=86962
References: https://bugs.freedesktop.org/show_bug.cgi?id=86992
Change-Id: I68715ef758025fab8db763941ef63bf60d7031e2
For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lrc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lrc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 7986eb3e5027..782e97638ed8 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -885,7 +885,7 @@ static int logical_ring_alloc_request(struct intel_engine_cs *ring, if (ring->outstanding_lazy_request) return 0; - request = kmalloc(sizeof(*request), GFP_KERNEL); + request = kzalloc(sizeof(*request), GFP_KERNEL); if (request == NULL) return -ENOMEM; |