ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead.
Signed-off-by: Len Brown <len.brown@intel.com>
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@ -70,8 +70,6 @@ enum {
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#define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */
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#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
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#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
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#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 100ms max. during EC ops */
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enum {
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EC_INTR = 1, /* Output buffer full */
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@ -159,11 +157,10 @@ static int acpi_ec_check_status(struct acpi_ec *ec, u8 event)
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static int acpi_ec_wait(struct acpi_ec *ec, u8 event)
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{
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if (acpi_ec_mode == EC_POLL) {
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int i;
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for (i = 0; i < ACPI_EC_UDELAY_COUNT; ++i) {
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unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
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while (time_before(jiffies, delay)) {
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if (acpi_ec_check_status(ec, event))
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return 0;
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udelay(ACPI_EC_UDELAY);
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}
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} else {
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if (wait_event_timeout(ec->wait,
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