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Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399

From Guenter Roeck <groeck@google.com>
Newsgroups linux.kernel
Subject Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399
Date 2016-06-23 19:30 +0200
Message-ID <rNgBX-4Mw-3@gated-at.bofh.it> (permalink)
References <rNcoG-1GG-7@gated-at.bofh.it> <rNcoG-1GG-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi Chris,

[ ... ]

> +       ret = extcon_register_notifier(tcphy->pd_extcon, EXTCON_USB,
> +                                      &tcphy->event_nb);
> +       if (ret) {
> +               dev_err(dev, "regitster EXTCON_USB notifer failed\n");
> +               return ret;
> +       }
> +
> +       ret = extcon_register_notifier(tcphy->pd_extcon, EXTCON_USB_HOST,
> +                                      &tcphy->event_nb);
> +       if (ret) {
> +               dev_err(dev, "regitster EXTCON_USB_HOST notifer failed\n");
> +               return ret;
> +       }
> +
> +       ret = extcon_register_notifier(tcphy->pd_extcon, EXTCON_DISP_DP,
> +                                      &tcphy->event_nb);
> +       if (ret) {
> +               dev_err(dev, "regitster EXTCON_DISP_DP notifer failed\n");
> +               return ret;
> +       }
> +

I don't think you can register multiple notifiers with the same
notifier block. It may work by chance, but at least the 'next' object
in notifier_clock is set in notifier_chain_register(). Best case it
may work, but worst case it might cause a loop in the list of
notifiers.

Guenter

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Thread

[v3 PATCH 0/5] Rockchip Type-C and DispplayPort driver Chris Zhong <zyw@rock-chips.com> - 2016-06-23 15:00 +0200
  Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Kishon Vijay Abraham I <kishon@ti.com> - 2016-06-23 15:00 +0200
    Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Heiko Stuebner <heiko@sntech.de> - 2016-06-24 21:40 +0200
      Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Chris Zhong <zyw@rock-chips.com> - 2016-06-27 04:20 +0200
        Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Guenter Roeck <groeck@google.com> - 2016-06-27 06:10 +0200
          Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Chris Zhong <zyw@rock-chips.com> - 2016-06-27 06:50 +0200
  [v3 PATCH 2/5] Documentation: bindings: add dt doc for Rockchip USB Type-C PHY Chris Zhong <zyw@rock-chips.com> - 2016-06-23 15:00 +0200
    Re: [v3 PATCH 2/5] Documentation: bindings: add dt doc for Rockchip  USB Type-C PHY Rob Herring <robh@kernel.org> - 2016-06-24 21:30 +0200
  [v3 PATCH 4/5] Documentation: bindings: add dt documentation for cdn DP controller Chris Zhong <zyw@rock-chips.com> - 2016-06-23 15:00 +0200
    Re: [v3 PATCH 4/5] Documentation: bindings: add dt documentation for  cdn DP controller Rob Herring <robh@kernel.org> - 2016-06-24 21:30 +0200
  [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Chris Zhong <zyw@rock-chips.com> - 2016-06-23 15:00 +0200
    Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Guenter Roeck <groeck@google.com> - 2016-06-23 19:30 +0200
    Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Guenter Roeck <groeck@google.com> - 2016-06-23 23:50 +0200
      Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Chris Zhong <zyw@rock-chips.com> - 2016-06-24 02:40 +0200
        Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Guenter Roeck <groeck@google.com> - 2016-06-24 04:20 +0200
          Re: [v3 PATCH 3/5] phy: Add USB Type-C PHY driver for rk3399 Chris Zhong <zyw@rock-chips.com> - 2016-06-24 04:50 +0200

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