[PATCH RESEND v2] drm/i915/gt: Log reason for setting TAINT_WARN at reset

[Rodrigo Vivi]

On Fri, Dec 20, 2024 at 02:17:14PM +0100, Andi Shyti wrote:
> From: Sebastian Brzezinka <sebastian.brzezinka at intel.com>
> 
> TAINT_WARN is used to notify CI about non-recoverable failures, which
> require device to be restarted. In some cases, there is no sufficient
> information about the reason for the restart. The test runner is just
> killed, and DUT is rebooted, logging only 'probe with driver i915 failed
> with error -4' to dmesg.
> 
> Printing error to dmesg before TAINT_WARN, would explain why the device
> has been restarted, and what caused the malfunction in the first place.
> 
> Signed-off-by: Sebastian Brzezinka <sebastian.brzezinka at intel.com>
> Reviewed-by: Andi Shyti <andi.shyti at linux.intel.com>
> Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
> ---
> Cc: Andi Shyti <andi.shyti at kernel.org>
> 
> Hi,
> 
> this patch for some reason did not reach the mailing list and it
> missed all the CI premerge tests. I am resending it, this time
> with the Changelog and the versioning.


Acked-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

> 
> I am leaving it for a few days in order to be reviewed by others,
> as well.
> 
> Andi
> 
> Changelog:
> ==========
> v1 -> v2:
>  - Reword the commit log
> 
>  drivers/gpu/drm/i915/gt/intel_reset.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
> index c2fe3fc78e76..aae5a081cb53 100644
> --- a/drivers/gpu/drm/i915/gt/intel_reset.c
> +++ b/drivers/gpu/drm/i915/gt/intel_reset.c
> @@ -1113,6 +1113,7 @@ static bool __intel_gt_unset_wedged(struct intel_gt *gt)
>  		 * Warn CI about the unrecoverable wedged condition.
>  		 * Time for a reboot.
>  		 */
> +		gt_err(gt, "Unrecoverable wedged condition\n");
>  		add_taint_for_CI(gt->i915, TAINT_WARN);
>  		return false;
>  	}
> @@ -1264,8 +1265,10 @@ void intel_gt_reset(struct intel_gt *gt,
>  	}
>  
>  	ret = resume(gt);
> -	if (ret)
> +	if (ret) {
> +		gt_err(gt, "Failed to resume (%d)\n", ret);
>  		goto taint;
> +	}
>  
>  finish:
>  	reset_finish(gt, awake);
> @@ -1608,6 +1611,7 @@ void intel_gt_set_wedged_on_init(struct intel_gt *gt)
>  	set_bit(I915_WEDGED_ON_INIT, &gt->reset.flags);
>  
>  	/* Wedged on init is non-recoverable */
> +	gt_err(gt, "Non-recoverable wedged on init\n");
>  	add_taint_for_CI(gt->i915, TAINT_WARN);
>  }
>  
> -- 
> 2.45.2
>