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SubjectRE: [PATCH 2/5] staging: fsl-mc: define a macro to differentiate root dprc
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> -----Original Message-----
> From: Greg KH [mailto:gregkh@linuxfoundation.org]
> Sent: Sunday, October 25, 2015 7:13 PM
> To: Pan Lijun-B44306 <Lijun.Pan@freescale.com>
> Cc: arnd@arndb.de; devel@driverdev.osuosl.org; linux-
> kernel@vger.kernel.org; Yoder Stuart-B08248 <stuart.yoder@freescale.com>;
> katz Itai-RM05202 <itai.katz@freescale.com>; Rivera Jose-B46482
> <German.Rivera@freescale.com>; Li Yang-Leo-R58472 <LeoLi@freescale.com>;
> Wood Scott-B07421 <scottwood@freescale.com>; agraf@suse.de; Hamciuc
> Bogdan-BHAMCIU1 <bhamciu1@freescale.com>; Marginean Alexandru-R89243
> <R89243@freescale.com>; Sharma Bhupesh-B45370
> <bhupesh.sharma@freescale.com>; Erez Nir-RM30794
> <nir.erez@freescale.com>; Schmitt Richard-B43082
> <richard.schmitt@freescale.com>; dan.carpenter@oracle.com
> Subject: Re: [PATCH 2/5] staging: fsl-mc: define a macro to differentiate root
> dprc
>
> On Sun, Oct 25, 2015 at 05:41:20PM -0500, Lijun Pan wrote:
> > Define is_root_dprc(dev) to tell whether a device is root dprc or not
> > via platform_bus_type.
> >
> > Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
> > ---
> > drivers/staging/fsl-mc/include/mc.h | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/staging/fsl-mc/include/mc.h
> > b/drivers/staging/fsl-mc/include/mc.h
> > index a933291..483763e 100644
> > --- a/drivers/staging/fsl-mc/include/mc.h
> > +++ b/drivers/staging/fsl-mc/include/mc.h
> > @@ -14,6 +14,7 @@
> > #include <linux/device.h>
> > #include <linux/mod_devicetable.h>
> > #include <linux/list.h>
> > +#include <linux/platform_device.h>
> > #include "../include/dprc.h"
> >
> > #define FSL_MC_VENDOR_FREESCALE 0x1957
> > @@ -109,6 +110,15 @@ struct fsl_mc_resource {
> > #define FSL_MC_IS_DPRC 0x0001
> >
> > /**
> > + * root dprc's parent is a platform device
> > + * that platform device's bus type is platform_bus_type.
> > + */
> > +#define is_root_dprc(dev) \
> > + ((to_fsl_mc_device(dev)->flags & FSL_MC_IS_DPRC) && \
> > + ((dev)->bus == &fsl_mc_bus_type) && \
> > + ((dev)->parent->bus == &platform_bus_type))
> > +
>
> It's best to make this type of thing a static inline function, to ensure you get the
> correct typechecking.
>

I will take your suggestion and make changes in patch v2.
Lijun


> thanks,
>
> greg k-h


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