From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Jeremy Linton <jeremy.linton@arm.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, andrew@lunn.ch,
f.fainelli@gmail.com, hkallweit1@gmail.com,
madalin.bucur@oss.nxp.com, calvin.johnson@oss.nxp.com,
linux-kernel@vger.kernel.org
Subject: Re: [RFC 02/11] net: phy: Simplify MMD device list termination
Date: Mon, 25 May 2020 09:09:40 +0100 [thread overview]
Message-ID: <20200525080940.GF1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <e25080cd-420a-da87-e13c-fa7e2ffb93a6@arm.com>
On Sun, May 24, 2020 at 09:48:55PM -0500, Jeremy Linton wrote:
> Hi,
>
> On 5/23/20 1:36 PM, Russell King - ARM Linux admin wrote:
> > On Fri, May 22, 2020 at 04:30:50PM -0500, Jeremy Linton wrote:
> > > Since we are already checking for *devs == 0 after
> > > the loop terminates, we can add a mostly F's check
> > > as well. With that change we can simplify the return/break
> > > sequence inside the loop.
> > >
> > > Add a valid_phy_id() macro for this, since we will be using it
> > > in a couple other places.
> >
> > I'm not sure you have the name of this correct, and your usage layer
> > in your patch series is correct.
>
> Or the name is poor..
>
> >
> > >
> > > Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
> > > ---
> > > drivers/net/phy/phy_device.c | 15 +++++++--------
> > > 1 file changed, 7 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> > > index 245899b58a7d..7746c07b97fe 100644
> > > --- a/drivers/net/phy/phy_device.c
> > > +++ b/drivers/net/phy/phy_device.c
> > > @@ -695,6 +695,11 @@ static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
> > > return 0;
> > > }
> > > +static bool valid_phy_id(int val)
> > > +{
> > > + return (val > 0 && ((val & 0x1fffffff) != 0x1fffffff));
> > > +}
> > > +
> > > /**
> > > * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
> > > * @bus: the target MII bus
> > > @@ -732,18 +737,12 @@ static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
> > > phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
> > > if (phy_reg < 0)
> > > return -EIO;
> > > - /* no device there, let's get out of here */
> > > - if ((*devs & 0x1fffffff) == 0x1fffffff) {
> > > - *phy_id = 0xffffffff;
> > > - return 0;
> > > - } else {
> > > - break;
> > > - }
> > > + break;
> > > }
> > > }
> > > /* no reported devices */
> > > - if (*devs == 0) {
> > > + if (!valid_phy_id(*devs)) {
> >
> > You are using this to validate the "devices in package" value, not the
> > PHY ID value. So, IMHO this should be called "valid_devs_in_package()"
> > or similar.
>
> Hmmm, its more "valid_phy_reg()" since it ends up being used to validate
> both the devs in package as well as phy id.
I don't think that is a valid use of the code you've put in
valid_phy_id().
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC for 0.8m (est. 1762m) line in suburbia: sync at 13.1Mbps down 424kbps up
next prev parent reply other threads:[~2020-05-25 8:10 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 21:30 [RFC 00/11] Make C45 autoprobe more robust Jeremy Linton
2020-05-22 21:30 ` [RFC 01/11] net: phy: Don't report success if devices weren't found Jeremy Linton
2020-05-23 18:20 ` Russell King - ARM Linux admin
2020-05-25 2:46 ` Jeremy Linton
2020-05-25 9:45 ` Russell King - ARM Linux admin
2020-05-25 21:02 ` Jeremy Linton
2020-05-25 21:07 ` Russell King - ARM Linux admin
2020-05-25 21:59 ` Jeremy Linton
2020-05-22 21:30 ` [RFC 02/11] net: phy: Simplify MMD device list termination Jeremy Linton
2020-05-23 18:36 ` Russell King - ARM Linux admin
2020-05-25 2:48 ` Jeremy Linton
2020-05-25 8:09 ` Russell King - ARM Linux admin [this message]
2020-05-22 21:30 ` [RFC 03/11] net: phy: refactor c45 phy identification sequence Jeremy Linton
2020-05-23 15:28 ` Andrew Lunn
2020-05-23 17:16 ` Jeremy Linton
2020-05-23 17:32 ` Jeremy Linton
2020-05-23 19:12 ` Russell King - ARM Linux admin
2020-05-23 18:30 ` Russell King - ARM Linux admin
2020-05-23 19:51 ` Andrew Lunn
2020-05-23 20:01 ` Russell King - ARM Linux admin
2020-05-25 2:37 ` Jeremy Linton
2020-05-22 21:30 ` [RFC 04/11] net: phy: Handle c22 regs presence better Jeremy Linton
2020-05-23 18:37 ` Russell King - ARM Linux admin
2020-05-25 3:34 ` Jeremy Linton
2020-05-25 9:53 ` Russell King - ARM Linux admin
2020-05-25 10:06 ` Russell King - ARM Linux admin
2020-05-25 21:51 ` Jeremy Linton
2020-05-25 22:01 ` Russell King - ARM Linux admin
2020-05-25 22:22 ` Jeremy Linton
2020-05-25 23:09 ` Russell King - ARM Linux admin
2020-05-25 23:22 ` Jeremy Linton
2020-05-25 23:33 ` Russell King - ARM Linux admin
2020-05-25 23:42 ` Jeremy Linton
2020-05-25 23:46 ` Andrew Lunn
2020-05-25 23:57 ` Russell King - ARM Linux admin
2020-05-25 23:16 ` Jeremy Linton
2020-05-25 23:30 ` Russell King - ARM Linux admin
2020-05-25 22:06 ` Andrew Lunn
2020-05-25 22:17 ` Jeremy Linton
2020-05-25 23:06 ` Andrew Lunn
2020-05-25 23:07 ` Russell King - ARM Linux admin
2020-05-25 23:12 ` Andrew Lunn
2020-05-25 23:46 ` Jeremy Linton
2020-05-25 23:47 ` Andrew Lunn
2020-05-22 21:30 ` [RFC 05/11] net: phy: Scan the entire MMD device space Jeremy Linton
2020-05-22 21:30 ` [RFC 06/11] net: phy: Hoist no phy detected state Jeremy Linton
2020-05-22 21:30 ` [RFC 07/11] net: phy: reset invalid phy reads of 0 back to 0xffffffff Jeremy Linton
2020-05-23 18:44 ` Russell King - ARM Linux admin
2020-05-25 4:20 ` Jeremy Linton
2020-05-25 8:20 ` Russell King - ARM Linux admin
2020-05-22 21:30 ` [RFC 08/11] net: phy: Allow mdio buses to auto-probe c45 devices Jeremy Linton
2020-05-24 14:44 ` Andrew Lunn
2020-05-25 4:28 ` Jeremy Linton
2020-05-25 8:25 ` Russell King - ARM Linux admin
2020-05-25 13:43 ` Andrew Lunn
2020-05-25 22:09 ` Jeremy Linton
2020-05-25 22:41 ` Russell King - ARM Linux admin
2020-05-22 21:30 ` [RFC 09/11] net: phy: Refuse to consider phy_id=0 a valid phy Jeremy Linton
2020-05-22 21:30 ` [RFC 10/11] net: example acpize xgmac_mdio Jeremy Linton
2020-05-23 18:48 ` Russell King - ARM Linux admin
2020-05-22 21:30 ` [RFC 11/11] net: example xgmac enable extended scanning Jeremy Linton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200525080940.GF1551@shell.armlinux.org.uk \
--to=linux@armlinux.org.uk \
--cc=andrew@lunn.ch \
--cc=calvin.johnson@oss.nxp.com \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=hkallweit1@gmail.com \
--cc=jeremy.linton@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=madalin.bucur@oss.nxp.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).