Re: [PATCH] net: sunplus: fix tx_poll spin_lock missing irqsave in NAPI context

On Thu, 20 Aug 2026 15:01:59 +0200 Andrew Gaylard wrote:

spl2sw_tx_poll() runs in NAPI (softirq) context and acquires
comm->tx_lock with plain spin_lock(). The hardirq handler
spl2sw_ethernet_interrupt() acquires the same lock, so a hardirq on
the same CPU while the NAPI poll holds the lock would deadlock with
IRQs disabled. Use spin_lock_irqsave/spin_unlock_irqrestore.

Please explain how the issue was found and how the fix was tested.
I mean - this is an ancient driver, if you don't have a way to test the
fix you should not be sending the patch.
-- 
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