lre_update_link(9)

💅 lre_update_link(9) — the Kernel API Manual glow-up 🎀

okay so bestie, welcome to the lre_update_link page of the Kernel API Manual ✨ this one's short and sweet but she's important, so let's get into it 💖

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🌸 NAME 🌸

lre_update_link — update link status in @phydev 👑

🦋 SYNOPSIS 🦋

int lre_update_link (struct phy_device *phydev );

🎀 ARGUMENTS 🎀

• phydev — the target phy_device struct 💅 like, this is the phy device we're messing with, iykyk

⭐ RETURN ⭐

• 0 on success 🥳
• < 0 on error 😭 (yeah, negative means something went wrong, no cap)

🔥 DESCRIPTION 🔥

So what she does is update the value in phydev->link so it actually reflects the current link value 🌈 like a little reality check for the link status, fr fr.

The way she pulls this off is kinda iconic: she needs to read the status register twice, and keep the second value 👀 (yes, twice — it's giving thorough, it's giving careful, we love a queen who double-checks herself 💅).

Also important: this is a genphy_update_link modified to work on LRE registers of BroadR-Reach PHY 🧚 so like, she's genphy's cousin but with a specific job, periodt ✨

👑 SEE ALSO 👑

• Kernel file ./drivers/net/phy/broadcom.c
• bcm5481x_read_abilities(9)

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🫶 quick vibe check bestie: read the status register twice, keep the second one. don't skip the double read, that's literally the whole point 😭💀

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mwah 💋 that's the whole page! shoutout to the source tree at ./drivers/net/phy and the October 2026 version of this lil doc — go off, kernel docs, you ate 🌟