On Thu, 2022-06-09 at 16:19 -0700, Ceraolo Spurio, Daniele wrote: > From: Tomas Winkler <tomas.winkler@xxxxxxxxx> > > Support matching with a discrete graphics card. > > Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx> > Cc: Vitaly Lubart <vitaly.lubart@xxxxxxxxx> > --- > drivers/misc/mei/pxp/mei_pxp.c | 13 ++++++++++--- > 1 file changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c > index 94d3ef3cc73a..645862f4bb38 100644 > --- a/drivers/misc/mei/pxp/mei_pxp.c > +++ b/drivers/misc/mei/pxp/mei_pxp.c > @@ -162,13 +162,20 @@ static int mei_pxp_component_match(struct device *dev, int subcomponent, > subcomponent != I915_COMPONENT_PXP) > return 0; > > - base = base->parent; > - if (!base) > + if (!dev) > return 0; > This check for !dev seems to be appearing a few lines after this other check below, which looks like a bug coz it means dev can be null and we are checking for validity after dereferencing it: if (!dev->driver || strcmp(dev->driver->name, "i915") || subcomponent != I915_COMPONENT_PXP) return 0; Im assuming this is an unintentional oversight so conditional RB to move things on (please fix when merging): Reviewed-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx> > > base = base->parent; > - dev = dev->parent; > + if (!base) /* mei device */ > + return 0; > > + base = base->parent; /* pci device */ > + /* for dgfx */ > + if (base && dev == base) > + return 1; > + > + /* for pch */ > + dev = dev->parent; > return (base && dev && dev == base); > } > > -- > 2.25.1 >
