On Wed, Feb 21, 2018 at 12:21:50AM +0200, Jyri Sarha wrote:
> @@ -94,6 +114,8 @@ static void panel_bridge_detach(struct drm_bridge *bridge)
> struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
>
> drm_panel_detach(panel_bridge->panel);
> +
> + device_link_del(panel_bridge->link);
No, you've set the DL_FLAG_AUTOREMOVE flag, so you'll end up removing
the link twice, which oopses.
It's either DL_FLAG_AUTOREMOVE or device_link_del(), not both.
> +static int panel_bridge_link_to_master(struct panel_bridge *panel_bridge)
> +{
> + struct device *mdev = panel_bridge->bridge.dev->dev;
> + struct device *pdev = panel_bridge->panel->dev;
> + u32 flags = DL_FLAG_AUTOREMOVE;
> +
> + panel_bridge->link = device_link_add(mdev, pdev, flags);
> + if (!panel_bridge->link) {
> + dev_err(pdev, "failed to link panel %s to %s\n",
> + dev_name(pdev), dev_name(mdev));
You're printing two instances of pdev's name in the log message,
one should be sufficient.
Also, you've mixed up the order: mdev is the consumer, pdev the
supplier.
(Bikeshed: The DL_FLAG_AUTOREMOVE would still fit within 80 chars
on the line with device_link_add() and the flags variable wouldn't
have to be declared then. Your call.)
Thanks,
Lukas
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