From c0ff17720ec5f42205b3d2ca03a18da0a8272976 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Thu, 16 Oct 2008 02:02:33 +0400 Subject: ACPI: EC: Check for IBF=0 periodically if not in GPE mode Signed-off-by: Alexey Starikovskiy Tested-by: Alan Jenkins Signed-off-by: Len Brown --- drivers/acpi/ec.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 453ba1e534e..444cd9ed12c 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -298,6 +298,18 @@ static int ec_check_ibf0(struct acpi_ec *ec) return (status & ACPI_EC_FLAG_IBF) == 0; } +static int ec_wait_ibf0(struct acpi_ec *ec) +{ + unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); + /* interrupt wait manually if GPE mode is not active */ + unsigned long timeout = test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ? + msecs_to_jiffies(ACPI_EC_DELAY) : msecs_to_jiffies(1); + while (time_before(jiffies, delay)) + if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), timeout)) + return 0; + return -ETIME; +} + static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, int force_poll) { @@ -315,8 +327,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, goto unlock; } } - if (!wait_event_timeout(ec->wait, ec_check_ibf0(ec), - msecs_to_jiffies(ACPI_EC_DELAY))) { + if (ec_wait_ibf0(ec)) { pr_err(PREFIX "input buffer is not empty, " "aborting transaction\n"); status = -ETIME; -- cgit v1.2.3