Bug#703640: src:linux: [3.8 -> 3.8.1 regression]: Resume from suspend stuck with framebuffer locking rework
Le jeudi 21 mars 2013 à 19:28 +0100, Vincent Blut a écrit :
> Package: src:linux
> Version: 3.8.3-1~experimental.1
> Severity: important
> Tags: upstream
>
> Hi,
>
> As mentioned in the subject, the following commit prevents me to resume from
> suspend in kernel ≥ 3.8.1:
>
> commit cace7c323ddde7358ab2f2390ece964c55f30330
> Author: Alan Cox <alan@linux.intel.com>
> Date: Fri Jan 25 10:28:15 2013 +1000
>
> fb: rework locking to fix lock ordering on takeover
>
> commit 50e244cc793d511b86adea24972f3a7264cae114 upstream.
>
> Adjust the console layer to allow a take over call where the caller
> already holds the locks. Make the fb layer lock in order.
>
> This is partly a band aid, the fb layer is terminally confused about the
> locking rules it uses for its notifiers it seems.
>
> [akpm@linux-foundation.org: remove stray non-ascii char, tidy comment]
> [akpm@linux-foundation.org: export do_take_over_console()]
> [airlied: cleanup another non-ascii char]
> Signed-off-by: Alan Cox <alan@linux.intel.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Stephen Rothwell <sfr@canb.auug.org.au>
> Cc: Jiri Kosina <jkosina@suse.cz>
> Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: Dave Airlie <airlied@redhat.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
> I didn't try to boot with this commit reverted, and looking at its size,
> I fear there will be some conflict to solve before attempting to do so.
>
> I guess it could be interesting to try 3.9-rc. to see how it
> behaves (I didn't see what have been merged in this area in the last
> merge window). I might try to connect through ssh to see if I get a
> trace.
Same issue with 3.9-rc3, I'll try to find some time tomorrow in order to
get eventual stack traces.
>
> Cheers,
> Vincent
>
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