On Thu, 2022-05-19 at 17:59 +0200, Greg KH wrote:
> On Tue, May 17, 2022 at 08:22:00PM +0530, Kushagra Verma wrote:
> > This patch removes the use of -ENOSYS as it is used when users try
> > to call a
> > syscall that doesn't exist. So, we don't need to check if 'ret == -
> > ENOSYS'.
>
> ENOSYS is also used internally in the kernel for other things.
>
> >
> > Signed-off-by: Kushagra Verma <kushagra765@xxxxxxxxxxx>
> > ---
> > drivers/usb/dwc3/core.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> > index c78205c5e19f..3c1a877d5183 100644
> > --- a/drivers/usb/dwc3/core.c
> > +++ b/drivers/usb/dwc3/core.c
> > @@ -1283,7 +1283,7 @@ static int dwc3_core_get_phy(struct dwc3
> > *dwc)
> > dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
> > if (IS_ERR(dwc->usb2_generic_phy)) {
> > ret = PTR_ERR(dwc->usb2_generic_phy);
> > - if (ret == -ENOSYS || ret == -ENODEV)
> > + if (ret == -ENODEV)
>
> Did you validate that no callers can ever set this to ENOSYS?
Yes, I think no callers should ever set ret to ENOSYS unless it comes under the other things ENOSYS is used for.
>
> Why was this added in the first place? What commit added it?
This was added by commit 57303488cd37d ("usb: dwc3: adapt dwc3 core to use Generic PHY Framework").
>
> thanks,
>
> greg k-h
Thanks,
Kushagra
