[Intel-gfx] [PATCH] drm/i915: More stolen quirking

[Martin Peres]

On 19/07/17 13:00, Daniel Vetter wrote:
> I've found a bios with an off-by-one at the other end. There's a pnp
> reservation for 0xc5400000-0xc7fffffe and we want stolen in 0xc6000000
> through 0xc8000000.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99872
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98683
> Cc: Martin Peres <martin.peres at linux.intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

Looks good, and it will reduce the noise in CI. Thanks!

Reviewed-by: Martin Peres <martin.peres at linux.intel.com>

> ---
>   drivers/gpu/drm/i915/i915_gem_stolen.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
> index a817b3e0b17e..c11c915382e7 100644
> --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> @@ -254,9 +254,10 @@ static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
>   		 * This is a BIOS w/a: Some BIOS wrap stolen in the root
>   		 * PCI bus, but have an off-by-one error. Hence retry the
>   		 * reservation starting from 1 instead of 0.
> +		 * There's also BIOS with off-by-one on the other end.
>   		 */
>   		r = devm_request_mem_region(dev_priv->drm.dev, base + 1,
> -					    ggtt->stolen_size - 1,
> +					    ggtt->stolen_size - 2,
>   					    "Graphics Stolen Memory");
>   		/*
>   		 * GEN3 firmware likes to smash pci bridges into the stolen
>