linux-kernel - Re: [PATCH] drm/tilcdc: fix wrong error handling

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Date:   Fri, 23 Sep 2016 15:01:13 +0300
From:   Jyri Sarha <jsarha@...com>
To:     Sean Paul <seanpaul@...gle.com>,
        Daniel Schultz <d.schultz@...tec.de>
CC:     dri-devel <dri-devel@...ts.freedesktop.org>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Dave Airlie <airlied@...ux.ie>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/tilcdc: fix wrong error handling

On 09/23/16 14:47, Sean Paul wrote:
> On Fri, Sep 23, 2016 at 3:52 AM, Daniel Schultz <d.schultz@...tec.de> wrote:
>> When 'component_bind_all' fails it should not try to unbind components
>> in the error handling. This will produce a null pointer kernel panic when
>> no component exist.
>>
>> This patch changes the order of the error handling. Now, it will only
>> unbind components if the are bound. Otherwise, the module will jump to
>> an error label below.
>>
>> Signed-off-by: Daniel Schultz <d.schultz@...tec.de>
> 
> Reviewed-by: Sean Paul <seanpaul@...omium.org>
> 

Thanks, for both. Should I pick this one :)?

BR,
Jyri

>> ---
>>  drivers/gpu/drm/tilcdc/tilcdc_drv.c | 6 +++---
>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
>> index d278093..d491610 100644
>> --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
>> +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
>> @@ -315,13 +315,13 @@ fail_irq_uninstall:
>>  fail_vblank_cleanup:
>>         drm_vblank_cleanup(dev);
>>
>> -fail_mode_config_cleanup:
>> -       drm_mode_config_cleanup(dev);
>> -
>>  fail_component_cleanup:
>>         if (priv->is_componentized)
>>                 component_unbind_all(dev->dev, dev);
>>
>> +fail_mode_config_cleanup:
>> +       drm_mode_config_cleanup(dev);
>> +
>>  fail_external_cleanup:
>>         tilcdc_remove_external_encoders(dev);
>>
>> --
>> 1.9.1
>>