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Commit 50c1e113 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown
Browse files

ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead. 



Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent a86e2772

drivers/acpi/ec.c

+2 −5
Original line number Diff line number Diff line
@@ -70,8 +70,6 @@ enum { 


#define ACPI_EC_DELAY		500	/* Wait 500ms max. during EC ops */

#define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */

#define ACPI_EC_UDELAY         100	/* Poll @ 100us increments */

#define ACPI_EC_UDELAY_COUNT   1000	/* Wait 100ms max. during EC ops */



enum {

	EC_INTR = 1,	/* Output buffer full */
@@ -159,11 +157,10 @@ static int acpi_ec_check_status(struct acpi_ec *ec, u8 event) 
static int acpi_ec_wait(struct acpi_ec *ec, u8 event)

{

	if (acpi_ec_mode == EC_POLL) {

		int i;

		for (i = 0; i < ACPI_EC_UDELAY_COUNT; ++i) {

		unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);

		while (time_before(jiffies, delay)) {

			if (acpi_ec_check_status(ec, event))

				return 0;

			udelay(ACPI_EC_UDELAY);

		}

	} else {

		if (wait_event_timeout(ec->wait,