Commit a3cd8d27 authored by Feng Tang's avatar Feng Tang Committed by Rafael J. Wysocki

ACPI / EC: Don't count a SCI interrupt as a false one

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: default avatarFeng Tang <>
Signed-off-by: default avatarRafael J. Wysocki <>
parent b76b51ba
......@@ -198,9 +198,13 @@ static void advance_transaction(struct acpi_ec *ec, u8 status)
t->done = true;
goto unlock;
/* 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))
spin_unlock_irqrestore(&ec->lock, flags);
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