Commit-ID: 2cf5a03cb29debb00681a8af1dfa9179b43404d1
Gitweb: http://git.kernel.org/tip/2cf5a03cb29debb00681a8af1dfa9179b43404d1
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 21 Jun 2015 20:16:09 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 25 Jun 2015 11:57:01 +0200
PCI/keystone: Fix race in installing chained IRQ handler
Fix a race where a pending interrupt could be received and the handler
called before the handler's data has been setup, by converting to
irq_set_chained_handler_and_data().
Search and conversion was done with coccinelle:
@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
- BUG();
|
-irq_set_chained_handler(E1, E3);
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);
@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
- BUG();
...
|
-irq_set_chained_handler(E1, E3);
...
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);
Reported-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Julia Lawall <Julia.Lawall@xxxxxxx>
Cc: Murali Karicheri <m-karicheri2@xxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: linux-pci@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
drivers/pci/host/pci-keystone.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 75333b0..47cf0c1 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -223,10 +223,9 @@ static void ks_pcie_setup_interrupts(struct keystone_pcie *ks_pcie)
/* MSI IRQ */
if (IS_ENABLED(CONFIG_PCI_MSI)) {
for (i = 0; i < ks_pcie->num_msi_host_irqs; i++) {
- irq_set_chained_handler(ks_pcie->msi_host_irqs[i],
- ks_pcie_msi_irq_handler);
- irq_set_handler_data(ks_pcie->msi_host_irqs[i],
- ks_pcie);
+ irq_set_chained_handler_and_data(ks_pcie->msi_host_irqs[i],
+ ks_pcie_msi_irq_handler,
+ ks_pcie);
}
}
}
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