From c30e30478c74e5be2fa3bbe954084a31f0d60570 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 21 Jun 2015 20:16:06 +0200 Subject: [PATCH] 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 Signed-off-by: Thomas Gleixner Cc: Julia Lawall Cc: Samuel Ortiz Cc: Lee Jones --- drivers/mfd/asic3.c | 3 +-- 1 file changed, 1 insertion(+), 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; } -- 2.20.1