linux-kernel - Re: drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c:70:2-8: preceding lock on line 67

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Date:	Wed, 14 Oct 2015 14:30:35 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Ben Skeggs <bskeggs@...hat.com>
cc:	kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: Re: drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c:70:2-8: preceding
 lock on line 67

Please check whether not releasing the lock is intentional.

julia

On Wed, 14 Oct 2015, kbuild test robot wrote:

> CC: kbuild-all@...org
> CC: linux-kernel@...r.kernel.org
> TO: Ben Skeggs <bskeggs@...hat.com>
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   5b5f1455272e23f4e7889cec37228802d8d01adf
> commit: 344c2d429dd86b1b0113177e18f15adb74e9d936 drm/nouveau/fb: remove dependence on namedb/engctx lookup
> date:   7 weeks ago
> :::::: branch date: 16 hours ago
> :::::: commit date: 7 weeks ago
>
> >> drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c:70:2-8: preceding lock on line 67
>
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git remote update linus
> git checkout 344c2d429dd86b1b0113177e18f15adb74e9d936
> vim +70 drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
>
> 344c2d42 Ben Skeggs 2015-08-20  61  }
> 344c2d42 Ben Skeggs 2015-08-20  62
> 344c2d42 Ben Skeggs 2015-08-20  63  struct nvkm_fifo_chan *
> 344c2d42 Ben Skeggs 2015-08-20  64  nvkm_fifo_chan_chid(struct nvkm_fifo *fifo, int chid, unsigned long *rflags)
> 344c2d42 Ben Skeggs 2015-08-20  65  {
> 344c2d42 Ben Skeggs 2015-08-20  66  	unsigned long flags;
> 344c2d42 Ben Skeggs 2015-08-20 @67  	spin_lock_irqsave(&fifo->lock, flags);
> 344c2d42 Ben Skeggs 2015-08-20  68  	if (fifo->channel[chid]) {
> 344c2d42 Ben Skeggs 2015-08-20  69  		*rflags = flags;
> 344c2d42 Ben Skeggs 2015-08-20 @70  		return (void *)fifo->channel[chid];
> 344c2d42 Ben Skeggs 2015-08-20  71  	}
> 344c2d42 Ben Skeggs 2015-08-20  72  	spin_unlock_irqrestore(&fifo->lock, flags);
> 344c2d42 Ben Skeggs 2015-08-20  73  	return NULL;
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>
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