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PCI: dwc: Remove IRQ handler and data in one go

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Call irq_set_chained_handler_and_data() to clear the chained handler
and the handler's data under irq_desc->lock.

See also 2cf5a03cb2 ("PCI/keystone: Fix race in installing chained
IRQ handler").

Link: https://lore.kernel.org/r/20210115212435.19940-2-martin@kaiser.cx
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Martin Kaiser 2021-01-15 22:24:34 +01:00 committed by Lorenzo Pieralisi
parent 3f0ea2360e
commit ad1cc6b75a
1 changed files with 2 additions and 4 deletions
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6
drivers/pci/controller/dwc/pcie-designware-host.c
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@ -258,10 +258,8 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
static void dw_pcie_free_msi(struct pcie_port *pp)
{
if (pp->msi_irq) {
irq_set_chained_handler(pp->msi_irq, NULL);
irq_set_handler_data(pp->msi_irq, NULL);
}
if (pp->msi_irq)
irq_set_chained_handler_and_data(pp->msi_irq, NULL, NULL);
irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_domain);