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-rw-r--r--drivers/gpu/drm/i915/i915_gem_stolen.c3
1 files changed, 2 insertions, 1 deletions
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