[i-g-t v6 1/4] lib/xe: Fix a comment error

[Dixit, Ashutosh]

On Mon, 24 Feb 2025 09:40:07 -0800, Oak Zeng wrote:
>
> The timeout value of __xe_wait_ufence returns the
> remaining time, not elapsed time. Fix it.
>
> Signed-off-by: Oak Zeng <oak.zeng at intel.com>
> ---
>  lib/xe/xe_ioctl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/xe/xe_ioctl.c b/lib/xe/xe_ioctl.c
> index 6d8388918..028102aa2 100644
> --- a/lib/xe/xe_ioctl.c
> +++ b/lib/xe/xe_ioctl.c
> @@ -496,7 +496,7 @@ void xe_exec_wait(int fd, uint32_t exec_queue, uint64_t addr)
>   *
>   * Function compares @value with memory pointed by @addr until they are equal.
>   *
> - * Returns (in @timeout), the elapsed time in nanoseconds if user fence was
> + * Returns (in @timeout), the remaining time in nanoseconds if user fence was

But the code in xe_wait_user_fence_ioctl() in the kernel is:

	args->timeout -= ktime_to_ns(ktime_sub(ktime_get(), start));

Which seems to be the elapsed, not the remaining time?

Also, if this patch is correct, then let's change for xe_wait_ufence() too.

>   * signalled. Returns 0 on success, -errno of ioctl on error.
>   */
>  int __xe_wait_ufence(int fd, uint64_t *addr, uint64_t value,
> --
> 2.26.3

Need to update your git too, though not for this patch :/