3.2.62-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Feng Tang <[email protected]> commit a3cd8d2789c2e265e09377f260e7d2ac9cec81bb upstream. Currently when advance_transaction() is called in EC interrupt handler, if there is nothing driver can do with the interrupt, it will be taken as a false one. But this is not always true, as there may be a SCI EC interrupt fired during normal read/write operation, which should not be counted as a false one. This patch fixes the problem. Signed-off-by: Feng Tang <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> --- drivers/acpi/ec.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -205,9 +205,13 @@ static void advance_transaction(struct a t->done = true; goto unlock; err: - /* false interrupt, state didn't change */ - if (in_interrupt()) + /* + * If SCI bit is set, then don't think it's a false IRQ + * otherwise will take a not handled IRQ as a false one. + */ + if (in_interrupt() && !(status & ACPI_EC_FLAG_SCI)) ++t->irq_count; + unlock: spin_unlock_irqrestore(&ec->curr_lock, flags); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
