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From: Xiong Weimin <xiongweimin@kylinos.cn>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: virtualization@lists.linux.dev, linux-kernel@vger.kernel.org,
	"Jason Wang" <jasowangio@gmail.com>,
	"Jason Wang" <jasowang@redhat.com>,
	"Xuan Zhuo" <xuanzhuo@linux.alibaba.com>,
	"Eugenio Pérez" <eperezma@redhat.com>,
	stable@vger.kernel.org
Subject: Re: [PATCH] virtio_mmio: disable IRQ wake before free_irq
Date: Wed, 05 Aug 2026 14:47:09 +0800	[thread overview]
Message-ID: <178591242945.1657366.12043874648568847249@kylinos.cn> (raw)
In-Reply-To: <20260805032937.1606737-1-xiongweimin@kylinos.cn>

On the virtio_input thread, Michael asked whether each of these patches
is a real or a theoretical issue for stable. For this virtio_mmio patch:

Real when the DT node has "wakeup-source".

vm_find_vqs() may enable_irq_wake() on the shared IRQ, and vm_del_vqs()
used to free_irq() without disable_irq_wake(), which leaves a wake
reference and can warn on later free/request cycles. Platforms without
that property do not hit it.

Please let me know if you still want Cc: stable on this one.

Thanks,
Xiong

      parent reply	other threads:[~2026-08-05  6:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-05  3:29 [PATCH] virtio_mmio: disable IRQ wake before free_irq Xiong Weimin
2026-08-05  6:19 ` Xiong Weimin
2026-08-05  6:47 ` Xiong Weimin [this message]

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