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authorAlexey Starikovskiy <astarikovskiy@suse.de>2008-10-16 02:02:33 +0400
committerLen Brown <len.brown@intel.com>2008-10-16 18:14:07 -0400
commitc0ff17720ec5f42205b3d2ca03a18da0a8272976 (patch)
tree3cbe691631cef08ab38ffe61ea442d49ebc013d3 /drivers/acpi/ec.c
parent455c8793d2c49eaecad038c8de83dade9fc3759f (diff)
ACPI: EC: Check for IBF=0 periodically if not in GPE mode
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/ec.c')
-rw-r--r--drivers/acpi/ec.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 453ba1e534ef..444cd9ed12c7 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;