9p/xen: fix release of IRQ

Kernel logs indicate an IRQ was double-freed.

Pass correct device ID during IRQ release.

Fixes: 71ebd71 ("xen/9pfs: connect to the backend")
Signed-off-by: Alex Zenla <[email protected]>
Signed-off-by: Alexander Merritt <[email protected]>
Signed-off-by: Ariadne Conill <[email protected]>
Reviewed-by: Juergen Gross <[email protected]>
Message-ID: <[email protected]>
[Dominique: remove confusing variable reset to 0]
Signed-off-by: Dominique Martinet <[email protected]>

Author: azenla

net/9p/trans_xen.c

@@ -286,7 +286,7 @@ static void xen_9pfs_front_free(struct xen_9pfs_front_priv *priv)
 		if (!priv->rings[i].intf)
 			break;
 		if (priv->rings[i].irq > 0)
-			unbind_from_irqhandler(priv->rings[i].irq, priv->dev);
+			unbind_from_irqhandler(priv->rings[i].irq, ring);
 		if (priv->rings[i].data.in) {
 			for (j = 0;
 			     j < (1 << priv->rings[i].intf->ring_order);