Messages in this thread Patch in this message | | | Date | Tue, 09 Mar 2021 09:42:15 +0100 | From | Thomas Gleixner <> | Subject | [patch 12/14] PCI: hv: Use tasklet_disable_in_atomic() |
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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 <tglx@linutronix.de> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Wei Liu <wei.liu@kernel.org> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Rob Herring <robh@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-hyperv@vger.kernel.org Cc: linux-pci@vger.kernel.org --- drivers/pci/controller/pci-hyperv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -1458,7 +1458,7 @@ static void hv_compose_msi_msg(struct ir * Prevents hv_pci_onchannelcallback() from running concurrently * in the tasklet. */ - tasklet_disable(&channel->callback_event); + tasklet_disable_in_atomic(&channel->callback_event); /* * Since this function is called with IRQ locks held, can't
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