| Message ID | 1347369022-10176-5-git-send-email-feng.tang@intel.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 5fc6a55..2afba5b 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -198,9 +198,13 @@ static void advance_transaction(struct acpi_ec *ec, u8 status) 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->lock, flags); }
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 <feng.tang@intel.com> --- drivers/acpi/ec.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-)