[PATCH] drm/i915: Make sure dsm_size has correct granularity

[Nirmoy Das]

DSM granularity is 1MB so make sure we stick to that.

v2: replace "1 * SZ_1M" with SZ_1M (Andrzej).

Cc: Matthew Auld <matthew.auld at intel.com>
Suggested-by: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index 90a967374b1a..d8e06e783e30 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -909,7 +909,7 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type,
 		dsm_base = intel_uncore_read64(uncore, GEN12_DSMBASE) & GEN12_BDSM_MASK;
 		if (WARN_ON(lmem_size < dsm_base))
 			return ERR_PTR(-ENODEV);
-		dsm_size = lmem_size - dsm_base;
+		dsm_size = ALIGN_DOWN(lmem_size - dsm_base, SZ_1M);
 	}
 
 	io_size = dsm_size;
-- 
2.39.0