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authorThomas Gleixner <tglx@linutronix.de>2015-06-21 21:00:31 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-06-25 11:57:56 +0200
commit20f83e717f287fd13fd85359624f10f3206bd34d (patch)
tree223d47a55e5bc0b8ae49602fa361141adb10811b /arch/mips/ath25
parent09c5cb942f7545e53819ee2ca72fe843d23880e5 (diff)
downloadlinux-20f83e717f287fd13fd85359624f10f3206bd34d.tar.bz2
MIPS/ath25: 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@arm.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com> Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/ath25')
-rw-r--r--arch/mips/ath25/ar2315.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/ath25/ar2315.c b/arch/mips/ath25/ar2315.c
index 2befa7d766a6..35f96f7a0a3c 100644
--- a/arch/mips/ath25/ar2315.c
+++ b/arch/mips/ath25/ar2315.c
@@ -161,8 +161,8 @@ void __init ar2315_arch_init_irq(void)
irq = irq_create_mapping(domain, AR2315_MISC_IRQ_AHB);
setup_irq(irq, &ar2315_ahb_err_interrupt);
- irq_set_chained_handler(AR2315_IRQ_MISC, ar2315_misc_irq_handler);
- irq_set_handler_data(AR2315_IRQ_MISC, domain);
+ irq_set_chained_handler_and_data(AR2315_IRQ_MISC,
+ ar2315_misc_irq_handler, domain);
ar2315_misc_irq_domain = domain;
}