From: Maxime Chevallier Date: Mon, 5 Jan 2026 15:18:39 +0000 (+0100) Subject: net: sfp: return the number of written bytes for smbus single byte access X-Git-Tag: v6.19-rc5~29^2~15 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13ff3e724207f579d3c814ee05516fefcb4f32e8;p=thirdparty%2Fkernel%2Flinux.git net: sfp: return the number of written bytes for smbus single byte access 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 Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20260105151840.144552-1-maxime.chevallier@bootlin.com Signed-off-by: Jakub Kicinski --- 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)