On Wed, Jul 24, 2019 at 12:11:09PM +0200, Greg KH wrote:
> On Tue, Jul 23, 2019 at 12:51:32PM +0800, Wu Hao wrote:
> > STP (SignalTap) is one of the private features under the port for
> > debugging. This patch adds private feature driver support for it
> > to allow userspace applications to mmap related mmio region and
> > provide STP service.
> >
> > Signed-off-by: Xu Yilun <yilun.xu@xxxxxxxxx>
> > Signed-off-by: Wu Hao <hao.wu@xxxxxxxxx>
> > Acked-by: Moritz Fischer <mdf@xxxxxxxxxx>
> > Acked-by: Alan Tull <atull@xxxxxxxxxx>
> > Signed-off-by: Moritz Fischer <mdf@xxxxxxxxxx>
> > ---
> > drivers/fpga/dfl-afu-main.c | 34 ++++++++++++++++++++++++++++++++++
> > 1 file changed, 34 insertions(+)
> >
> > diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
> > index 15dd4cb..395f96e 100644
> > --- a/drivers/fpga/dfl-afu-main.c
> > +++ b/drivers/fpga/dfl-afu-main.c
> > @@ -514,6 +514,36 @@ static void port_afu_uinit(struct platform_device *pdev,
> > .uinit = port_afu_uinit,
> > };
> >
> > +static int port_stp_init(struct platform_device *pdev,
> > + struct dfl_feature *feature)
> > +{
> > + struct resource *res = &pdev->resource[feature->resource_index];
> > +
> > + dev_dbg(&pdev->dev, "PORT STP Init.\n");
>
> ftrace is your friend, no need to do a lot of "look I am here!"
> messages.
Hi Greg,
Thanks for the code review!
Sure, let me remove them.
>
> > +
> > + return afu_mmio_region_add(dev_get_platdata(&pdev->dev),
> > + DFL_PORT_REGION_INDEX_STP,
> > + resource_size(res), res->start,
> > + DFL_PORT_REGION_MMAP | DFL_PORT_REGION_READ |
> > + DFL_PORT_REGION_WRITE);
> > +}
> > +
> > +static void port_stp_uinit(struct platform_device *pdev,
> > + struct dfl_feature *feature)
> > +{
> > + dev_dbg(&pdev->dev, "PORT STP UInit.\n");
>
> Same here.
>
> Why have this function at all if it does not do anything?
Let me remove them in the next version. actually uinit callback is
always required in current code, i will add one more patch to change
it, and remove all uinit functions who do nothing, it does save code.
Thanks for the comments.
Hao
>
>
> thanks,
>
> greg k-h
