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SubjectRe: [PATCH v4 2/4] net: phy: Add function to retrieve LED configuration from the DT
On Fri, Aug 02, 2019 at 06:38:10PM +0200, Andrew Lunn wrote:
> On Thu, Aug 01, 2019 at 12:07:57PM -0700, Matthias Kaehlcke wrote:
> > Add a phylib function for retrieving PHY LED configuration that
> > is specified in the device tree using the generic binding. LEDs
> > can be configured to be 'on' for a certain link speed or to blink
> > when there is TX/RX activity.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> > Changes in v4:
> > - patch added to the series
> > ---
> > drivers/net/phy/phy_device.c | 50 ++++++++++++++++++++++++++++++++++++
> > include/linux/phy.h | 15 +++++++++++
> > 2 files changed, 65 insertions(+)
> >
> > diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> > index 6b5cb87f3866..b4b48de45712 100644
> > --- a/drivers/net/phy/phy_device.c
> > +++ b/drivers/net/phy/phy_device.c
> > @@ -2188,6 +2188,56 @@ static bool phy_drv_supports_irq(struct phy_driver *phydrv)
> > return phydrv->config_intr && phydrv->ack_interrupt;
> > }
> >
> > +int of_get_phy_led_cfg(struct phy_device *phydev, int led,
> > + struct phy_led_config *cfg)
> > +{
> > + struct device_node *np, *child;
> > + const char *trigger;
> > + int ret;
> > +
> > + if (!IS_ENABLED(CONFIG_OF_MDIO))
> > + return -ENOENT;
> > +
> > + np = of_find_node_by_name(phydev->mdio.dev.of_node, "leds");
> > + if (!np)
> > + return -ENOENT;
> > +
> > + for_each_child_of_node(np, child) {
> > + u32 val;
> > +
> > + if (!of_property_read_u32(child, "reg", &val)) {
> > + if (val == (u32)led)
> > + break;
> > + }
> > + }
>
> Hi Matthias
>
> This is leaking references to np and child. In the past we have not
> cared about this too much, but we are now getting patches adding the
> missing releases. So it would be good to fix this.

Good point, I'll fix it in the next revision.

Thanks

Matthias

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