> Commit 1b7fc5aae8867046f8d3d45808309d5b7f2e036a causes my Thinkpad T21
> to no longer generate any hotkey events (e.g. suspend fn-f4, switch-output
> fn-f7, etc.) after resume.
>
> It's regression from 2.6.25. 2.6.26 and 2.6.27-rc7 are broken,
> reverting that commit on 2.6.27-rc7 makes keys work again.
>
> Thanks.
>
> [Rafael added for regression tracking ;]
>
>
> commit 1b7fc5aae8867046f8d3d45808309d5b7f2e036a
> Author: Alexey Starikovskiy <astarikovskiy@suse.de>
> Date: Fri Jun 6 11:49:33 2008 -0400
>
> ACPI: EC: Use msleep instead of udelay while waiting for event.
>
>
http://bugzilla.kernel.org/show_bug.cgi?id=10724
>
> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
> Signed-off-by: Len Brown <len.brown@intel.com>
>
> diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
> index 0924992..5622aee 100644
> --- a/drivers/acpi/ec.c
> +++ b/drivers/acpi/ec.c
> @@ -194,7 +194,7 @@ 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))
> return 0;
> - udelay(ACPI_EC_UDELAY);
> + msleep(1);
> }
> }
> pr_err(PREFIX "acpi_ec_wait timeout, status = 0x%2.2x, event = %s\n",
