From: "Marek Behún" <kabel@kernel.org>
To: Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org, Russell King <rmk+kernel@armlinux.org.uk>,
Jakub Kicinski <kuba@kernel.org>,
davem@davemloft.net, pali@kernel.org
Subject: Re: [PATCH net-next v4 1/4] net: phy: mdio-i2c: support I2C MDIO protocol for RollBall SFP modules
Date: Tue, 12 Jan 2021 22:01:14 +0100 [thread overview]
Message-ID: <20210112220114.0f990cbe@kernel.org> (raw)
In-Reply-To: <X/4MgF+n+jQZ11Gd@lunn.ch>
On Tue, 12 Jan 2021 21:54:24 +0100
Andrew Lunn <andrew@lunn.ch> wrote:
> > +static int i2c_transfer_rollball(struct i2c_adapter *i2c,
> > + struct i2c_msg *msgs, int num)
> > +{
> > + u8 saved_page;
> > + int ret;
> > +
> > + i2c_lock_bus(i2c, I2C_LOCK_SEGMENT);
> > +
> > + /* save original page */
> > + ret = __i2c_rollball_get_page(i2c, msgs->addr, &saved_page);
> > + if (ret)
> > + goto unlock;
> > +
> > + /* change to RollBall MDIO page */
> > + ret = __i2c_rollball_set_page(i2c, msgs->addr, SFP_PAGE_ROLLBALL_MDIO);
> > + if (ret)
> > + goto unlock;
> > +
> > + /* do the transfer */
> > + ret = __i2c_transfer_err(i2c, msgs, num);
> > + if (ret)
> > + goto unlock;
>
> If get page and set page worked, and you get an error in during the
> actual data transfer, i wonder if you should try restoring the page
> before returning with the error?
I don't know. Can i2c trasfer fail and the next one succeed?
next prev parent reply other threads:[~2021-01-12 21:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-11 5:00 [PATCH net-next v4 0/4] Support for RollBall 10G copper SFP modules Marek Behún
2021-01-11 5:00 ` [PATCH net-next v4 1/4] net: phy: mdio-i2c: support I2C MDIO protocol for RollBall " Marek Behún
2021-01-12 8:42 ` Heiner Kallweit
2021-01-12 14:02 ` Andrew Lunn
2021-01-12 14:40 ` Heiner Kallweit
2021-01-12 17:49 ` Marek Behún
2021-01-12 19:22 ` Russell King - ARM Linux admin
2021-01-18 12:13 ` Pali Rohár
2021-01-18 15:45 ` Russell King - ARM Linux admin
2021-01-12 20:20 ` Andrew Lunn
2021-01-12 20:43 ` Andrew Lunn
2021-01-12 20:53 ` Marek Behún
2021-01-12 20:55 ` Andrew Lunn
2021-01-12 20:54 ` Andrew Lunn
2021-01-12 21:01 ` Marek Behún [this message]
2021-01-13 10:51 ` Pali Rohár
2021-01-12 21:22 ` Russell King - ARM Linux admin
2021-01-13 11:22 ` Pali Rohár
2021-01-13 13:56 ` Andrew Lunn
2021-01-13 13:58 ` Pali Rohár
2021-01-13 16:14 ` Russell King - ARM Linux admin
2021-01-11 5:00 ` [PATCH net-next v4 2/4] net: phylink: allow attaching phy for SFP modules on 802.3z mode Marek Behún
2021-01-13 10:38 ` Pali Rohár
2021-01-11 5:00 ` [PATCH net-next v4 3/4] net: sfp: create/destroy I2C mdiobus before PHY probe/after PHY release Marek Behún
2021-01-13 10:41 ` Pali Rohár
2021-01-11 5:00 ` [PATCH net-next v4 4/4] net: sfp: add support for multigig RollBall transceivers Marek Behún
2021-01-13 10:49 ` Pali Rohár
2021-01-13 11:08 ` Russell King - ARM Linux admin
2021-01-13 11:26 ` Pali Rohár
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=20210112220114.0f990cbe@kernel.org \
--to=kabel@kernel.org \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pali@kernel.org \
--cc=rmk+kernel@armlinux.org.uk \
/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).