net: wangxun: introduce WX_STATE_DOWN to serialize device shutdown state

Replace various netif_running() checks with an explicit WX_STATE_DOWN
state bit to track whether the device datapath and inte

net: wangxun: introduce WX_STATE_DOWN to serialize device shutdown state

Replace various netif_running() checks with an explicit WX_STATE_DOWN
state bit to track whether the device datapath and interrupt handling
are operational.

The previous logic relied on netif_running() to gate interrupt
reenablement, queue wakeups, statistics updates, and service task
execution. However, netif_running() only reflects the administrative
state of the netdevice and does not fully serialize against teardown
and reset paths. During device shutdown and reset flows, asynchronous
contexts such as interrupt handlers, NAPI poll, and service work could
still observe netif_running() as true while device resources were
already being disabled or freed.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Link: https://patch.msgid.link/20260525100543.27140-2-jiawenwu@trustnetic.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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net: libwx: use request_irq for VF misc interrupt

Currently, request_threaded_irq() is used with a primary handler but a
NULL threaded handler, while also setting the IRQF_ONESHOT flag. This
specifi

net: libwx: use request_irq for VF misc interrupt

Currently, request_threaded_irq() is used with a primary handler but a
NULL threaded handler, while also setting the IRQF_ONESHOT flag. This
specific combination triggers a WARNING since the commit aef30c8d569c
("genirq: Warn about using IRQF_ONESHOT without a threaded handler").

WARNING: kernel/irq/manage.c:1502 at __setup_irq+0x4fa/0x760

Fix the issue by switching to request_irq(), which is the appropriate
interface or a non-threaded interrupt handler, and removing the
unnecessary IRQF_ONESHOT flag.

Fixes: eb4898fde1de ("net: libwx: add wangxun vf common api")
Cc: stable@vger.kernel.org
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Link: https://patch.msgid.link/786DDC7D5CCA6D0A+20260429083743.88961-2-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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net: libwx: fix VF illegal register access

Register WX_CFG_PORT_ST is a PF restricted register. When a VF is
initialized, attempting to read this register triggers an illegal
register access, which

net: libwx: fix VF illegal register access

Register WX_CFG_PORT_ST is a PF restricted register. When a VF is
initialized, attempting to read this register triggers an illegal
register access, which lead to a system hang.

When the device is VF, the bus function ID can be obtained directly from
the PCI_FUNC(pdev->devfn).

Fixes: a04ea57aae37 ("net: libwx: fix device bus LAN ID")
Cc: stable@vger.kernel.org
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Link: https://patch.msgid.link/4D1F4452D21DE107+20260429083743.88961-1-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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