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| author | Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> | 2006-12-07 16:42:17 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2006-12-08 08:56:07 +0100 |
| commit | 50c1e1138cb94f6aca0f8555777edbcefe0324e2 (patch) | |
| tree | e61e0fa46221d8744b249897aaa7c461d01cf2ad | |
| parent | ACPI: ec: Rename gpe_bit to gpe (diff) | |
| download | linux-50c1e1138cb94f6aca0f8555777edbcefe0324e2.tar.xz linux-50c1e1138cb94f6aca0f8555777edbcefe0324e2.zip | |
ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead.
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/ec.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 722acafdf32e..8ef74e7b3b91 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -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, |