From: Matthew Brost <matthew.brost@intel.com> To: John Harrison <john.c.harrison@intel.com> Cc: intel-gfx@lists.freedesktop.org, daniele.ceraolospurio@intel.com, dri-devel@lists.freedesktop.org Subject: Re: [PATCH] drm/i915: Check return intel_context_timeline_lock of in eb_pin_timeline Date: Tue, 4 Jan 2022 15:06:35 -0800 [thread overview] Message-ID: <20220104230635.GA15808@jons-linux-dev-box> (raw) In-Reply-To: <cbfbab9f-8c1b-a07f-767a-be87b6646dbf@intel.com> On Tue, Jan 04, 2022 at 03:05:03PM -0800, John Harrison wrote: > On 1/4/2022 09:31, Matthew Brost wrote: > > intel_context_timeline_lock can return can error if interrupted by a > > user when trying to lock the timeline mutex. Check the return value of > > intel_context_timeline_lock in eb_pin_timeline (execbuf IOCTL). > > > > Fixes: 544460c33821 ("drm/i915: Multi-BB execbuf") > > Signed-off-by: Matthew Brost <matthew.brost@intel.com> > > --- > > drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > index e9541244027a..65a078945b00 100644 > > --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > @@ -2517,6 +2517,9 @@ static int eb_pin_timeline(struct i915_execbuffer *eb, struct intel_context *ce, > > i915_request_put(rq); > > tl = intel_context_timeline_lock(ce); > > + if (IS_ERR(tl)) > > + return PTR_ERR(tl); > > + > > intel_context_exit(ce); > Won't this leak the stuff acquired by the intel_context_enter() above if the > _exit() is now skipped? > Yep, this isn't right. I think should just call mutex_lock / mutex_unlock directly on the timeline mutex. Matt > John. > > > intel_context_timeline_unlock(tl); >
WARNING: multiple messages have this Message-ID (diff)
From: Matthew Brost <matthew.brost@intel.com> To: John Harrison <john.c.harrison@intel.com> Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: Re: [Intel-gfx] [PATCH] drm/i915: Check return intel_context_timeline_lock of in eb_pin_timeline Date: Tue, 4 Jan 2022 15:06:35 -0800 [thread overview] Message-ID: <20220104230635.GA15808@jons-linux-dev-box> (raw) In-Reply-To: <cbfbab9f-8c1b-a07f-767a-be87b6646dbf@intel.com> On Tue, Jan 04, 2022 at 03:05:03PM -0800, John Harrison wrote: > On 1/4/2022 09:31, Matthew Brost wrote: > > intel_context_timeline_lock can return can error if interrupted by a > > user when trying to lock the timeline mutex. Check the return value of > > intel_context_timeline_lock in eb_pin_timeline (execbuf IOCTL). > > > > Fixes: 544460c33821 ("drm/i915: Multi-BB execbuf") > > Signed-off-by: Matthew Brost <matthew.brost@intel.com> > > --- > > drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > index e9541244027a..65a078945b00 100644 > > --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c > > @@ -2517,6 +2517,9 @@ static int eb_pin_timeline(struct i915_execbuffer *eb, struct intel_context *ce, > > i915_request_put(rq); > > tl = intel_context_timeline_lock(ce); > > + if (IS_ERR(tl)) > > + return PTR_ERR(tl); > > + > > intel_context_exit(ce); > Won't this leak the stuff acquired by the intel_context_enter() above if the > _exit() is now skipped? > Yep, this isn't right. I think should just call mutex_lock / mutex_unlock directly on the timeline mutex. Matt > John. > > > intel_context_timeline_unlock(tl); >
next prev parent reply other threads:[~2022-01-04 23:12 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-04 17:31 [PATCH] drm/i915: Check return intel_context_timeline_lock of in eb_pin_timeline Matthew Brost 2022-01-04 17:31 ` [Intel-gfx] " Matthew Brost 2022-01-04 18:31 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork 2022-01-04 20:17 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork 2022-01-04 23:05 ` [PATCH] " John Harrison 2022-01-04 23:05 ` [Intel-gfx] " John Harrison 2022-01-04 23:06 ` Matthew Brost [this message] 2022-01-04 23:06 ` Matthew Brost
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