From: Alexey Starikovskiy <astarikovskiy@suse.de>
Date: Tue, 18 Mar 2008 23:45:12 +0000 (+0300)
Subject: Revert "ACPI: EC: Handle IRQ storm on Acer laptops"
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d7a0e1f56472db0825e13f9dd39f0ad79b8c8b3e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

Revert "ACPI: EC: Handle IRQ storm on Acer laptops"

This reverts commit 2c81ce4c9c37b910210f2640c28e98a0c398dc26.

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: Alexey Starikovskiy <astarikovskiy@suse.de>
Cc: Pavel Machek <pavel@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e7e197e3a4ff..7222a18a0319 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -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);