From: Maxime Chevallier <maxime.chevallier@bootlin.com>
To: davem@davemloft.net, Andrew Lunn <andrew@lunn.ch>,
Jakub Kicinski <kuba@kernel.org>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Jonas Jelonek <jelonek.jonas@gmail.com>,
Heiner Kallweit <hkallweit1@gmail.com>
Cc: "Maxime Chevallier" <maxime.chevallier@bootlin.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
thomas.petazzoni@bootlin.com,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Köry Maincent" <kory.maincent@bootlin.com>,
"Simon Horman" <horms@kernel.org>,
"Romain Gantois" <romain.gantois@bootlin.com>,
"Marek Behún" <kabel@kernel.org>
Subject: [PATCH net] net: sfp: return the number of written bytes for smbus single byte access
Date: Mon, 5 Jan 2026 16:18:39 +0100 [thread overview]
Message-ID: <20260105151840.144552-1-maxime.chevallier@bootlin.com> (raw)
We expect the SFP write accessors to return the number of written bytes.
We fail to do so for single-byte smbus accesses, which may cause errors
when setting a module's high-power state and for some cotsworks modules.
Let's return the amount of written bytes, as expected.
Fixes: 7662abf4db94 ("net: phy: sfp: Add support for SMBus module access")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
drivers/net/phy/sfp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 6166e9196364..84bef5099dda 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -765,7 +765,7 @@ static int sfp_smbus_byte_write(struct sfp *sfp, bool a2, u8 dev_addr,
dev_addr++;
}
- return 0;
+ return data - (u8 *)buf;
}
static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c)
--
2.49.0
next reply other threads:[~2026-01-05 15:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-05 15:18 Maxime Chevallier [this message]
2026-01-05 15:40 ` [PATCH net] net: sfp: return the number of written bytes for smbus single byte access Andrew Lunn
2026-01-07 1:20 ` patchwork-bot+netdevbpf
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=20260105151840.144552-1-maxime.chevallier@bootlin.com \
--to=maxime.chevallier@bootlin.com \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=f.fainelli@gmail.com \
--cc=hkallweit1@gmail.com \
--cc=horms@kernel.org \
--cc=jelonek.jonas@gmail.com \
--cc=kabel@kernel.org \
--cc=kory.maincent@bootlin.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=romain.gantois@bootlin.com \
--cc=thomas.petazzoni@bootlin.com \
/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