[PATCH v2] drm/xe: use resource_size() in xe_pagemap_create()

[Aryan Sinha <sinha.aryan03@gmail.com>]

Use resource_size() instead of open coding res->end - res->start + 1.

Include linux/ioport.h explicitly, since the file relies on struct
resource and now on the helper as well.

Signed-off-by: Aryan Sinha <sinha.aryan03@gmail.com>
---
v2: elaborate more in the commit message, and include
    linux/ioport.h. Both as per Rodrigo suggestions.

Link to v1: https://lore.kernel.org/all/20261001163328.51556-1-sinha.aryan03@gmail.com/
 drivers/gpu/drm/xe/xe_svm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c
index b228a737c..a9b087c43 100644
--- a/drivers/gpu/drm/xe/xe_svm.c
+++ b/drivers/gpu/drm/xe/xe_svm.c
@@ -3,6 +3,7 @@
  * Copyright © 2024 Intel Corporation
  */
 
+#include <linux/ioport.h>
 #include <linux/pci-p2pdma.h>
 
 #include <drm/drm_drv.h>
@@ -1848,7 +1849,7 @@ static struct xe_pagemap *xe_pagemap_create(struct xe_device *xe, struct xe_vram
 out_no_pages:
 	drm_pagemap_release_owner(&xpagemap->peer);
 out_no_owner:
-	devm_release_mem_region(dev, res->start, res->end - res->start + 1);
+	devm_release_mem_region(dev, res->start, resource_size(res));
 out_err:
 	drm_pagemap_put(dpagemap);
 	return ERR_PTR(err);
-- 
2.46.0