• Thomas Gleixner's avatar
    mfd/asic3: Fix race in installing chained IRQ handler · c30e3047
    Thomas Gleixner authored
    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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
    Signed-off-by: default avatarThomas 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>
    c30e3047
asic3.c 26.7 KB