Re: 2.6.16-rc6-mm1 : Setting clocksource results in error

[Alexander Gran <alex@zodiac.dnsalias.org>]

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Hi,

applied patch. Didn't work?! Same error as before..

regards
Alex


Am Dienstag, 14. März 2006 20:11 schrieb john stultz:
> On Tue, 2006-03-14 at 09:35 +0100, Alexander Gran wrote:
> > I'm still fiddeling with my way to slow netbeans debugger. I just tried
> > to change the clocksource. That resulted in an error, but apparently
> > worked. Is that expected behaviour:
> > root@t40:/sys/devices/system/clocksource/clocksource0# l
> > insgesamt 0
> > -rw------- 1 root root 4,0K 2006-03-14 09:31 available_clocksource
> > -rw------- 1 root root    0 2006-03-14 09:31 current_clocksource
> > root@t40:/sys/devices/system/clocksource/clocksource0# cat
> > available_clocksource
> > acpi_pm jiffies tsc pit
> > root@t40:/sys/devices/system/clocksource/clocksource0# echo acpi_pm >
> > current_clocksource
> > -su: echo: write error: Das Argument ist ungültig
> > root@t40:/sys/devices/system/clocksource/clocksource0# cat
> > current_clocksource acpi_pm
>
> Huh. Interesting.
>
> Oh! I see it, we're stripping the \n from the name and returning a count
> value one less then what was given.
>
> You can verify it by noticing "echo -n tsc > current_clocksource" does
> not give the error.
>
> This small fix should resolve it.
>
> Thanks for the bug report!
> -john
>
> Signed-off-by: John Stultz <johnstul@us.ibm.com>
>
> diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
> index d2ce2c3..fe22f64 100644
> --- a/kernel/time/clocksource.c
> +++ b/kernel/time/clocksource.c
> @@ -220,6 +220,7 @@ sysfs_show_current_clocksources(struct s
>  static ssize_t sysfs_override_clocksource(struct sys_device *dev,
>  					  const char *buf, size_t count)
>  {
> +	size_t ret = count;
>  	/* strings from sysfs write are not 0 terminated! */
>  	if (count >= sizeof(override_name))
>  		return -EINVAL;
> @@ -241,7 +242,7 @@ static ssize_t sysfs_override_clocksourc
>
>  	spin_unlock_irq(&clocksource_lock);
>
> -	return count;
> +	return ret;
>  }
>
>  /**

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