Re: [PATCH net 2/2] net: macb: mask TXUBR during TX NAPI poll to prevent IRQ storms

[Sebastian Andrzej Siewior]

On 2026-07-06 16:02:15 [+0200], Christian Taedcke via B4 Relay wrote:
> From: Christian Taedcke <christian.taedcke@xxxxxxxxxxxxxxx>
> 
> macb_interrupt() defers TX completion handling to NAPI, but when it
> schedules the poll it only masks TCOMP, even though TXUBR is enabled
> alongside it (both are part of MACB_TX_INT_FLAGS). macb_tx_poll() is
> asymmetric in the same way and only re-enables TCOMP. TXUBR is thus
> left unmasked while responsibility for handling it has been deferred
> to NAPI.

So this is not a race condition, this is always a failure?

Sebastian