Re: [PATCH] drm/i915/gt: remove redundant assignment to variable x
From: Colin Ian King
Date: Tue Apr 14 2020 - 06:07:46 EST
Hi Dan,
I'd post a revert, but I don't seem to see an upstream commit for this
this to revert against. What's the revert policy in these cases? Or can
the patch be just ignored by the maintainers so it's not applied?
Colin
On 14/04/2020 10:23, Dan Carpenter wrote:
> Hi Colin,
>
> url: https://github.com/0day-ci/linux/commits/Colin-King/drm-i915-gt-remove-redundant-assignment-to-variable-x/20200411-032731
> base: git://anongit.freedesktop.org/drm-intel for-linux-next
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> smatch warnings:
> drivers/gpu/drm/i915/gt/intel_engine_cs.c:1210 print_request() error: uninitialized symbol 'x'.
>
> # https://github.com/0day-ci/linux/commit/6ee08d455bba0066e8f5f276dcd43d9e3e594dc5
> git remote add linux-review https://github.com/0day-ci/linux
> git remote update linux-review
> git checkout 6ee08d455bba0066e8f5f276dcd43d9e3e594dc5
> vim +/x +1210 drivers/gpu/drm/i915/gt/intel_engine_cs.c
>
> f636edb214a5ff drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2017-10-09 1202 static void print_request(struct drm_printer *m,
> e61e0f51ba7974 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-02-21 1203 struct i915_request *rq,
> f636edb214a5ff drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2017-10-09 1204 const char *prefix)
> f636edb214a5ff drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2017-10-09 1205 {
> ab2681512b4c10 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-03-14 1206 const char *name = rq->fence.ops->get_timeline_name(&rq->fence);
> 96d4f03c20d04c drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-05-17 1207 char buf[80] = "";
> 6ee08d455bba00 drivers/gpu/drm/i915/gt/intel_engine_cs.c Colin Ian King 2020-04-10 1208 int x;
> ^^^^^
>
> 247870ac8ea729 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-04-24 1209
> 247870ac8ea729 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-04-24 @1210 x = print_sched_attr(rq->i915, &rq->sched.attr, buf, x, sizeof(buf));
> ^
> Uninitialized variable
>
> ab2681512b4c10 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-03-14 1211
> b300fde8965fdd drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-02-26 1212 drm_printf(m, "%s %llx:%llx%s%s %s @ %dms: %s\n",
> b7268c5eed0ab4 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-04-18 1213 prefix,
> b300fde8965fdd drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-02-26 1214 rq->fence.context, rq->fence.seqno,
> 8547444137ec61 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-01-29 1215 i915_request_completed(rq) ? "!" :
> 8547444137ec61 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-01-29 1216 i915_request_started(rq) ? "*" :
> 8547444137ec61 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-01-29 1217 "",
> 8c334f24e3b448 drivers/gpu/drm/i915/gt/intel_engine_cs.c Chris Wilson 2019-05-01 1218 test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
> 8c334f24e3b448 drivers/gpu/drm/i915/gt/intel_engine_cs.c Chris Wilson 2019-05-01 1219 &rq->fence.flags) ? "+" :
> 52c0fdb25c7c91 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2019-01-29 1220 test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
> 8c334f24e3b448 drivers/gpu/drm/i915/gt/intel_engine_cs.c Chris Wilson 2019-05-01 1221 &rq->fence.flags) ? "-" :
> 8c334f24e3b448 drivers/gpu/drm/i915/gt/intel_engine_cs.c Chris Wilson 2019-05-01 1222 "",
> 247870ac8ea729 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-04-24 1223 buf,
> f636edb214a5ff drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2017-10-09 1224 jiffies_to_msecs(jiffies - rq->emitted_jiffies),
> ab2681512b4c10 drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2018-03-14 1225 name);
> f636edb214a5ff drivers/gpu/drm/i915/intel_engine_cs.c Chris Wilson 2017-10-09 1226 }
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
>