Re: [PATCH] drm/i915: Don't request a bug report for unsafe module parameters

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

On Sun, May 06, 2018 at 07:31:47PM +0100, Chris Wilson wrote:
> Unsafe module parameters are just that, unsafe. If the user is foolish
> enough to try them and the kernel breaks, they get to keep both pieces.
> Don't ask them to file a bug report if they broke it themselves.
> 
> References: https://bugs.freedesktop.org/show_bug.cgi?id=106423
> Fixes: d15d7538c6d2 ("drm/i915: Tune down init error message due to failure injection")
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>

I believe there are cases where having the reports would be extremely useful,
like on PSR case.
But of course prioritized as "Lowest".

Better than not having anything and suddenly, when we switch
things on, we start having so many reports at once.

So, probably a different message would be worth trying?

> ---
>  drivers/gpu/drm/i915/i915_drv.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 9b782045ae17..9c449b8d8eab 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -101,7 +101,13 @@ __i915_printk(struct drm_i915_private *dev_priv, const char *level,
>  		   __builtin_return_address(0), &vaf);
>  
>  	if (is_error && !shown_bug_once) {
> -		dev_notice(kdev, "%s", FDO_BUG_MSG);
> +		/*
> +		 * Ask the user to file a bug report for the error, except
> +		 * if they may have caused the bug by fiddling with unsafe
> +		 * module parameters.
> +		 */
> +		if (!test_taint(TAINT_USER))
> +			dev_notice(kdev, "%s", FDO_BUG_MSG);
>  		shown_bug_once = true;
>  	}
>  
> -- 
> 2.17.0
> 
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx