From: Matthew Auld <matthew.auld@intel.com>
Date: Mon, 6 Dec 2021 11:25:38 +0000 (+0000)
Subject: drm/i915/migrate: fix length calculation
X-Git-Tag: v5.15.92~539
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=af0265dfeffa42256a4d52b73509f91c7e9ed113;p=platform%2Fkernel%2Flinux-rpi.git

drm/i915/migrate: fix length calculation

[ Upstream commit 31d70749bfe110593fbe8bf45e7c7788c7d85035 ]

No need to insert PTEs for the PTE window itself, also foreach expects a
length not an end offset, which could be gigantic here with a second
engine.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206112539.3149779-3-matthew.auld@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index fb7fe3a..5b59a6e 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -133,7 +133,7 @@ static struct i915_address_space *migrate_vm(struct intel_gt *gt)
 			goto err_vm;
 
 		/* Now allow the GPU to rewrite the PTE via its own ppGTT */
-		vm->vm.foreach(&vm->vm, base, base + sz, insert_pte, &d);
+		vm->vm.foreach(&vm->vm, base, d.offset - base, insert_pte, &d);
 	}
 
 	return &vm->vm;