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SubjectRe: [PATCH v4 1/2] platform/chrome: cros_ec_typec: Use workqueue for port update
On Mon, Jun 29, 2020 at 2:18 PM Guenter Roeck <groeck@google.com> wrote:
>
> On Mon, Jun 29, 2020 at 2:13 PM Prashant Malani <pmalani@chromium.org> wrote:
> >
> > Use a work queue to call the port update routines, instead of doing it
> > directly in the PD notifier callback. This will prevent other drivers
> > with PD notifier callbacks from being blocked on the port update routine
> > completing.
> >
> > Signed-off-by: Prashant Malani <pmalani@chromium.org>
>
> I can see you are having fun with me :-)

Haha, my apologies , I'm being forgetful :)
>
> > - int ret, i;
> > + int i, ret;
>
> Reviewed-by: Guenter Roeck <groeck@chromium.org>
>
> > ---
> >
> > Changes in v4:
> > - Removed extra newline.
> > - Moved both variable declarations into one line.
> >
> > Changes in v3:
> > - Use new 100 character line length limit.
> >
> > Changes in v2:
> > - No changes.
> >
> > drivers/platform/chrome/cros_ec_typec.c | 23 ++++++++++++++++++-----
> > 1 file changed, 18 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
> > index 0c041b79cbba..69c4118e280c 100644
> > --- a/drivers/platform/chrome/cros_ec_typec.c
> > +++ b/drivers/platform/chrome/cros_ec_typec.c
> > @@ -58,6 +58,7 @@ struct cros_typec_data {
> > /* Array of ports, indexed by port number. */
> > struct cros_typec_port *ports[EC_USB_PD_MAX_PORTS];
> > struct notifier_block nb;
> > + struct work_struct port_work;
> > };
> >
> > static int cros_typec_parse_port_props(struct typec_capability *cap,
> > @@ -619,18 +620,24 @@ static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
> > return 0;
> > }
> >
> > -static int cros_ec_typec_event(struct notifier_block *nb,
> > - unsigned long host_event, void *_notify)
> > +static void cros_typec_port_work(struct work_struct *work)
> > {
> > - struct cros_typec_data *typec = container_of(nb, struct cros_typec_data,
> > - nb);
> > - int ret, i;
> > + struct cros_typec_data *typec = container_of(work, struct cros_typec_data, port_work);
> > + int i, ret;
> >
> > for (i = 0; i < typec->num_ports; i++) {
> > ret = cros_typec_port_update(typec, i);
> > if (ret < 0)
> > dev_warn(typec->dev, "Update failed for port: %d\n", i);
> > }
> > +}
> > +
> > +static int cros_ec_typec_event(struct notifier_block *nb,
> > + unsigned long host_event, void *_notify)
> > +{
> > + struct cros_typec_data *typec = container_of(nb, struct cros_typec_data, nb);
> > +
> > + schedule_work(&typec->port_work);
> >
> > return NOTIFY_OK;
> > }
> > @@ -689,6 +696,12 @@ static int cros_typec_probe(struct platform_device *pdev)
> > if (ret < 0)
> > return ret;
> >
> > + INIT_WORK(&typec->port_work, cros_typec_port_work);
> > +
> > + /*
> > + * Safe to call port update here, since we haven't registered the
> > + * PD notifier yet.
> > + */
> > for (i = 0; i < typec->num_ports; i++) {
> > ret = cros_typec_port_update(typec, i);
> > if (ret < 0)
> > --
> > 2.27.0.212.ge8ba1cc988-goog
> >

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