[1/5] PCI: dwc: fix dw_pcie_free_msi() if msi_irq is invalid
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Message ID 20190226194909.0e0c4758@xhacker.debian
State New
Headers show
Series
  • PCI: dwc: support remove
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Commit Message

Jisheng Zhang Feb. 26, 2019, 11:56 a.m. UTC
we should check msi_irq before calling irq_set_chained_handler() and
irq_set_handler_data().

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Patch
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diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 0c18ab63811f..a94d3530b694 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -298,8 +298,10 @@  int dw_pcie_allocate_domains(struct pcie_port *pp)
 
 void dw_pcie_free_msi(struct pcie_port *pp)
 {
-	irq_set_chained_handler(pp->msi_irq, NULL);
-	irq_set_handler_data(pp->msi_irq, NULL);
+	if (pp->msi_irq) {
+		irq_set_chained_handler(pp->msi_irq, NULL);
+		irq_set_handler_data(pp->msi_irq, NULL);
+	}
 
 	irq_domain_remove(pp->msi_domain);
 	irq_domain_remove(pp->irq_domain);