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authorThomas Gleixner <tglx@linutronix.de>2015-06-21 21:16:06 +0300
committerThomas Gleixner <tglx@linutronix.de>2015-06-25 12:56:52 +0300
commitc30e30478c74e5be2fa3bbe954084a31f0d60570 (patch)
tree451a72c83663bbdbb0eabc767b8922fb0967c3f9 /drivers/mfd/asic3.c
parent3fb250ed39b2f883b566826132e04626da5910aa (diff)
downloadlinux-c30e30478c74e5be2fa3bbe954084a31f0d60570.tar.xz
mfd/asic3: 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: Samuel Ortiz <sameo@linux.intel.com> Cc: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/asic3.c')
-rw-r--r--drivers/mfd/asic3.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index 977bd3a3eed0..120df5c08741 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -417,9 +417,8 @@ static int __init asic3_irq_probe(struct platform_device *pdev)
asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
ASIC3_INTMASK_GINTMASK);
- irq_set_chained_handler(asic->irq_nr, asic3_irq_demux);
+ irq_set_chained_handler_and_data(asic->irq_nr, asic3_irq_demux, asic);
irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
- irq_set_handler_data(asic->irq_nr, asic);
return 0;
}