linux-kernel - RE: [v2] drm/msm: add null checks for drm device to avoid crash during probe defer

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Message-ID: <BN0PR02MB81734C33B33066D5C4092CDAE4559@BN0PR02MB8173.namprd02.prod.outlook.com>
Date:   Tue, 27 Sep 2022 09:41:43 +0000
From:   Vinod Polimera <vpolimer@....qualcomm.com>
To:     Javier Martinez Canillas <javierm@...hat.com>,
        "dmitry.baryshkov@...aro.org" <dmitry.baryshkov@...aro.org>,
        "Vinod Polimera (QUIC)" <quic_vpolimer@...cinc.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "freedreno@...ts.freedesktop.org" <freedreno@...ts.freedesktop.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC:     "dianders@...omium.org" <dianders@...omium.org>,
        Abhinav Kumar <abhinavk@...cinc.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "swboyd@...omium.org" <swboyd@...omium.org>,
        "Kalyan Thota (QUIC)" <quic_kalyant@...cinc.com>
Subject: RE: [v2] drm/msm: add null checks for drm device to avoid crash
 during probe defer



> -----Original Message-----
> From: Javier Martinez Canillas <javierm@...hat.com>
> Sent: Tuesday, September 27, 2022 2:33 PM
> To: Vinod Polimera <vpolimer@....qualcomm.com>;
> dmitry.baryshkov@...aro.org; Vinod Polimera (QUIC)
> <quic_vpolimer@...cinc.com>; dri-devel@...ts.freedesktop.org; linux-arm-
> msm@...r.kernel.org; freedreno@...ts.freedesktop.org;
> devicetree@...r.kernel.org
> Cc: dianders@...omium.org; vpolimer@...cinc.com; Abhinav Kumar
> <abhinavk@...cinc.com>; linux-kernel@...r.kernel.org;
> swboyd@...omium.org; kalyant@...cinc.com
> Subject: Re: [v2] drm/msm: add null checks for drm device to avoid crash
> during probe defer
> 
> WARNING: This email originated from outside of Qualcomm. Please be wary
> of any links or attachments, and do not enable macros.
> 
> Hello Vinod and Dmitry,
> 
> On 9/27/22 09:31, Vinod Polimera wrote:
> >> -----Original Message-----
> >> From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> >> Sent: Friday, August 26, 2022 2:11 PM
> >> To: Vinod Polimera (QUIC) <quic_vpolimer@...cinc.com>; dri-
> >> devel@...ts.freedesktop.org; linux-arm-msm@...r.kernel.org;
> >> freedreno@...ts.freedesktop.org; devicetree@...r.kernel.org
> >> Cc: linux-kernel@...r.kernel.org; robdclark@...il.com;
> >> dianders@...omium.org; vpolimer@...cinc.com;
> swboyd@...omium.org;
> >> kalyant@...cinc.com
> >> Subject: Re: [v2] drm/msm: add null checks for drm device to avoid crash
> >> during probe defer
> >>
> 
> [...]
> 
> >> Vinod, do we still want to pursue this fix? If so, could you please
> >> update it according to the comment.
> >>
> 
> I don't think this patch is needed anymore, since AFAICT the issue has
> been fixed by commit 0a58d2ae572a ("drm/msm: Make .remove and
> .shutdown
> HW shutdown consistent") which is already in the drm/drm-next branch.
Yes , Issue will be fixed with the  commit 0a58d2ae572a ("drm/msm: Make .remove and .shutdown) . Hence  we can  drop this patch.
> 
> --
> Best regards,
> 
> Javier Martinez Canillas
> Core Platforms
> Red Hat

- Vinod P.