Commit-ID: bf54da7d3a49d3359574cdc1590bbc79ee19be6a
Gitweb: http://git.kernel.org/tip/bf54da7d3a49d3359574cdc1590bbc79ee19be6a
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 21 Jun 2015 21:00:29 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 25 Jun 2015 11:57:52 +0200
avr32/at32ap: 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: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Hans-Christian Egtvedt <egtvedt@xxxxxxxxxxxx>
---
arch/avr32/mach-at32ap/extint.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/avr32/mach-at32ap/extint.c b/arch/avr32/mach-at32ap/extint.c
index cfb298d..2d48b6a 100644
--- a/arch/avr32/mach-at32ap/extint.c
+++ b/arch/avr32/mach-at32ap/extint.c
@@ -231,8 +231,7 @@ static int __init eic_probe(struct platform_device *pdev)
irq_set_chip_data(eic->first_irq + i, eic);
}
- irq_set_chained_handler(int_irq, demux_eic_irq);
- irq_set_handler_data(int_irq, eic);
+ irq_set_chained_handler_and_data(int_irq, demux_eic_irq, eic);
if (pdev->id == 0) {
nmi_eic = eic;
--
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