From: Borislav Petkov <bp@alien8.de>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: DRI Development <dri-devel@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>,
Dave Airlie <airlied@gmail.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] drm: don't check modeset locks in panic handler
Date: Thu, 2 May 2013 12:13:08 +0200 [thread overview]
Message-ID: <20130502101308.GA16684@pd.tnic> (raw)
In-Reply-To: <1367480585-22814-1-git-send-email-daniel.vetter@ffwll.ch>
On Thu, May 02, 2013 at 09:43:05AM +0200, Daniel Vetter wrote:
> Since we know that locking is broken in that case and it's more
> important to not flood the dmesg with random gunk.
>
> Cc: Dave Airlie <airlied@gmail.com>
> Cc: Borislav Petkov <bp@alien8.de>
> References: https://groups.google.com/forum/?fromgroups=#!topic/linux.kernel/QFzFxSUeV4I
Yeah, we have this nice redirector service on k.org which uses the
Message-ID only and doesn't rely on some external URLs remaining stable.
You could use that instead:
Link: http://lkml.kernel.org/r/20130502000206.GH15623@pd.tnic
> Cc: stable@vger.kernel.org
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> drivers/gpu/drm/drm_crtc.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 792c3e3..3be0802 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -78,6 +78,10 @@ void drm_warn_on_modeset_not_all_locked(struct drm_device *dev)
> {
> struct drm_crtc *crtc;
>
> + /* Locking is currently fubar in the panic handler. */
> + if (oops_in_progress)
> + return;
> +
> list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
> WARN_ON(!mutex_is_locked(&crtc->mutex));
Yep, thanks.
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2013-05-02 10:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-02 0:02 WARNING: at drivers/gpu/drm/drm_crtc.c:82 drm_warn_on_modeset_not_all_locked+0x8d/0xc0() Borislav Petkov
2013-05-02 0:41 ` Daniel Vetter
2013-05-02 0:57 ` Dave Airlie
2013-05-02 7:43 ` [PATCH] drm: don't check modeset locks in panic handler Daniel Vetter
2013-05-02 10:13 ` Borislav Petkov [this message]
2013-05-02 20:45 ` Daniel Vetter
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