Re: [patch 12/14] PCI: hv: Use tasklet_disable_in_atomic()

From: Wei Liu <wei.liu@kernel.org>
Date: 2021-03-10 11:35:29
Also in: linux-hyperv, linux-pci, lkml, netdev
Reply to: Thomas Gleixner, 2021-03-09

On Tue, Mar 09, 2021 at 09:42:15AM +0100, Thomas Gleixner wrote:

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

The hv_compose_msi_msg() callback in irq_chip::irq_compose_msi_msg is
invoked via irq_chip_compose_msi_msg(), which itself is always invoked from
atomic contexts from the guts of the interrupt core code.

There is no way to change this w/o rewriting the whole driver, so use
tasklet_disable_in_atomic() which allows to make tasklet_disable()
sleepable once the remaining atomic users are addressed.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <redacted>

Acked-by: Wei Liu <wei.liu@kernel.org>

Thomas Gleixner · 2021-03-09
[patch 01/14] tasklets: Replace barrier() with cpu_relax() in tasklet_unlock_wait() · Thomas Gleixner · 2021-03-09
[patch 02/14] tasklets: Use static inlines for stub implementations · Thomas Gleixner · 2021-03-09
[patch 03/14] tasklets: Provide tasklet_disable_in_atomic() · Thomas Gleixner · 2021-03-09
[patch 05/14] tasklets: Replace spin wait in tasklet_unlock_wait() · Thomas Gleixner · 2021-03-09
[patch 06/14] tasklets: Replace spin wait in tasklet_kill() · Thomas Gleixner · 2021-03-09
[patch 09/14] net: sundance: Use tasklet_disable_in_atomic(). · Thomas Gleixner · 2021-03-09
[patch 07/14] tasklets: Prevent tasklet_unlock_spin_wait() deadlock on RT · Thomas Gleixner · 2021-03-09
Re: [patch 07/14] tasklets: Prevent tasklet_unlock_spin_wait() deadlock on RT · Sebastian Andrzej Siewior · 2021-03-09
Re: [patch 07/14] tasklets: Prevent tasklet_unlock_spin_wait() deadlock on RT · Sebastian Andrzej Siewior · 2021-03-09
Re: [patch 07/14] tasklets: Prevent tasklet_unlock_spin_wait() deadlock on RT · Thomas Gleixner · 2021-03-10
[patch 08/14] net: jme: Replace link-change tasklet with work · Thomas Gleixner · 2021-03-09
[patch 11/14] atm: eni: Use tasklet_disable_in_atomic() in the send() callback · Thomas Gleixner · 2021-03-09
[patch 13/14] firewire: ohci: Use tasklet_disable_in_atomic() where required · Thomas Gleixner · 2021-03-09
[patch 12/14] PCI: hv: Use tasklet_disable_in_atomic() · Thomas Gleixner · 2021-03-09
Re: [patch 12/14] PCI: hv: Use tasklet_disable_in_atomic() · Bjorn Helgaas · 2021-03-09
Re: [patch 12/14] PCI: hv: Use tasklet_disable_in_atomic() · Wei Liu · 2021-03-10
[patch 10/14] ath9k: Use tasklet_disable_in_atomic() · Thomas Gleixner · 2021-03-09
[patch 14/14] tasklets: Switch tasklet_disable() to the sleep wait variant · Thomas Gleixner · 2021-03-09
[patch 04/14] tasklets: Use spin wait in tasklet_disable() temporarily · Thomas Gleixner · 2021-03-09
Peter Zijlstra · 2021-03-09
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