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authorAlexey Starikovskiy <astarikovskiy@suse.de>2009-12-30 15:53:10 +0300
committerLen Brown <len.brown@intel.com>2010-01-15 22:53:04 -0500
commit54070101f86ca9a6e9ba243c999d144721ec3db7 (patch)
tree7642d320afef14bc1e306ff420adb1e834f430c7 /drivers/acpi
parentf5347867c5aea94c625246eaff8f7820b0a4cd8a (diff)
ACPI: EC: Add wait for irq storm
Merge of poll and irq modes accelerated EC transaction, so that keyboard starts to suffer again. Add msleep(1) into transaction path for the storm to allow keyboard controller to do its job. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=14747 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ec.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 047330929821..d6471bb6852f 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -259,7 +259,6 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
spin_unlock_irqrestore(&ec->curr_lock, tmp);
ret = ec_poll(ec);
- pr_debug(PREFIX "transaction end\n");
spin_lock_irqsave(&ec->curr_lock, tmp);
ec->curr = NULL;
spin_unlock_irqrestore(&ec->curr_lock, tmp);
@@ -316,6 +315,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
/* check if we received SCI during transaction */
ec_check_sci_sync(ec, acpi_ec_read_status(ec));
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+ msleep(1);
/* it is safe to enable GPE outside of transaction */
acpi_enable_gpe(NULL, ec->gpe);
} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
@@ -323,6 +323,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
"transactions will use polling mode\n");
set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
}
+ pr_debug(PREFIX "transaction end\n");
end:
if (ec->global_lock)
acpi_release_global_lock(glk);