Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
To:     intel-gfx@lists.freedesktop.org
Cc:     linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        mchehab@kernel.org, chris@chris-wilson.co.uk,
        matthew.auld@intel.com, thomas.hellstrom@linux.intel.com,
        jani.nikula@intel.com, nirmoy.das@intel.com, airlied@linux.ie,
        daniel@ffwll.ch, andi.shyti@linux.intel.com,
        andrzej.hajda@intel.com, keescook@chromium.org,
        mauro.chehab@linux.intel.com,
        intel-gfx-trybot@lists.freedesktop.org
Subject: [PATCH v8 7/8] drm/i915: Use error code as -E2BIG when the size of gem ttm object is too large
Date:   Tue, 23 Aug 2022 19:17:28 +0900
Message-Id: <20220823101729.2098841-8-gwan-gyeong.mun@intel.com>
In-Reply-To: <20220823101729.2098841-1-gwan-gyeong.mun@intel.com>
References: <20220823101729.2098841-1-gwan-gyeong.mun@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

The ttm_bo_init_reserved() functions returns -ENOSPC if the size is too big
to add vma. The direct function that returns -ENOSPC is drm_mm_insert_node_in_range().
To handle the same error as other code returning -E2BIG when the size is
too large, it converts return value to -E2BIG.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 615541b650fa..e3046e02b47a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -1210,6 +1210,17 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
 	ret = ttm_bo_init_reserved(&i915->bdev, i915_gem_to_ttm(obj), bo_type,
 				   &i915_sys_placement, page_size >> PAGE_SHIFT,
 				   &ctx, NULL, NULL, i915_ttm_bo_destroy);
+
+	/*
+	 * XXX: The ttm_bo_init_reserved() functions returns -ENOSPC if the size
+	 * is too big to add vma. The direct function that returns -ENOSPC is
+	 * drm_mm_insert_node_in_range(). To handle the same error as other code
+	 * that returns -E2BIG when the size is too large, it converts -ENOSPC to
+	 * -E2BIG.
+	 */
+	if (size >> PAGE_SHIFT > INT_MAX && ret == -ENOSPC)
+		ret = -E2BIG;
+
 	if (ret)
 		return i915_ttm_err_to_gem(ret);
 
-- 
2.37.1