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authorThomas Gleixner <tglx@linutronix.de>2015-06-21 21:00:34 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-06-25 11:57:57 +0200
commit08ece35e7dcc24591e27089029f1fea14e76d1fa (patch)
tree6228d8398ec97fc77d868b098c42590d493a8d5a /arch/mips
parent20f83e717f287fd13fd85359624f10f3206bd34d (diff)
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')
-rw-r--r--arch/mips/ath25/ar5312.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/ath25/ar5312.c b/arch/mips/ath25/ar5312.c
index b6887f75144c..fd6c9119461d 100644
--- a/arch/mips/ath25/ar5312.c
+++ b/arch/mips/ath25/ar5312.c
@@ -156,8 +156,8 @@ void __init ar5312_arch_init_irq(void)
irq = irq_create_mapping(domain, AR5312_MISC_IRQ_AHB_PROC);
setup_irq(irq, &ar5312_ahb_err_interrupt);
- irq_set_chained_handler(AR5312_IRQ_MISC, ar5312_misc_irq_handler);
- irq_set_handler_data(AR5312_IRQ_MISC, domain);
+ irq_set_chained_handler_and_data(AR5312_IRQ_MISC,
+ ar5312_misc_irq_handler, domain);
ar5312_misc_irq_domain = domain;
}