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Commit d7a0e1f5 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Linus Torvalds
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Revert "ACPI: EC: Handle IRQ storm on Acer laptops" 



This reverts commit 2c81ce4c.

It caused several new troubles (eg suspend slowdown bisected down to
this patch by Pavel Machek), so just revert it for now.

Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Cc: Pavel Machek <pavel@suse.cz>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2caf4703

drivers/acpi/ec.c

+0 −11
Original line number Diff line number Diff line
@@ -129,7 +129,6 @@ static struct acpi_ec { 
	struct mutex lock;

	wait_queue_head_t wait;

	struct list_head list;

	atomic_t irq_count;

	u8 handlers_installed;

} *boot_ec, *first_ec;
@@ -182,8 +181,6 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) 
{

	int ret = 0;



	atomic_set(&ec->irq_count, 0);



	if (unlikely(event == ACPI_EC_EVENT_OBF_1 &&

		     test_bit(EC_FLAGS_NO_OBF1_GPE, &ec->flags)))

		force_poll = 1;
@@ -230,7 +227,6 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) 
		while (time_before(jiffies, delay)) {

			if (acpi_ec_check_status(ec, event))

				goto end;

			msleep(5);

		}

	}

	pr_err(PREFIX "acpi_ec_wait timeout,"
@@ -533,13 +529,6 @@ static u32 acpi_ec_gpe_handler(void *data) 
	struct acpi_ec *ec = data;



	pr_debug(PREFIX "~~~> interrupt\n");

	atomic_inc(&ec->irq_count);

	if (atomic_read(&ec->irq_count) > 5) {

		pr_err(PREFIX "GPE storm detected, disabling EC GPE\n");

		acpi_disable_gpe(NULL, ec->gpe, ACPI_ISR);

		clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);

		return ACPI_INTERRUPT_HANDLED;

	}

	clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);

	if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))

		wake_up(&ec->wait);