[PATCH net-next 1/3] net: stmmac: clear half-duplex caps where unsupported

Maxime Chevallier maxime.chevallier at bootlin.com
Fri Jan 30 11:18:44 PST 2026


On 30/01/2026 19:09, Russell King (Oracle) wrote:

> If you look at /sys/kernel/debug/stmmaceth/ethX/dma_cap, it should
> say whether half duplex is supported (I guess in your case it will
> be, it's probably very unlikely not to be.) However, would be worth
> knowing whether the if() is taken or not!
> 

Just rebuilt a kernel w/ debugfs support, and indeed I have :
[...]
	10/100 Mbps: Y
	1000 Mbps: Y
	Half duplex: Y
[...]

So looks like the if() isn't taken :)

Maxime



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