Hi Thierry,
Just passing by.
On 11/03/2014 10:27 AM, Thierry Reding wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
>
> The HDMI hotplug signal may toggle after the DRM driver has been
> unloaded. Make sure not to call into DRM if that's the case.
>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
> drivers/gpu/drm/tegra/output.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
> index 6b393cfbb5e7..def74914dd72 100644
> --- a/drivers/gpu/drm/tegra/output.c
> +++ b/drivers/gpu/drm/tegra/output.c
> @@ -181,7 +181,8 @@ static irqreturn_t hpd_irq(int irq, void *data)
> {
> struct tegra_output *output = data;
>
> - drm_helper_hpd_irq_event(output->connector.dev);
> + if (output->connector.dev)
> + drm_helper_hpd_irq_event(output->connector.dev);
>
> return IRQ_HANDLED;
> }
>
Since output->connector.dev is not synchronized between irq and other
code this patch do not solves the issue, it just decreases chances of
the disaster.
Regards
Andrzej
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