From 7fc96201bdbec680ecbf715840657df8fcef571d Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 3 Jun 2021 18:41:12 +0200
Subject: drm/shmem-helper: Align to page size in dumb_create
Git-commit: 35d283658a6196b2057be562096610c6793e1219
Patch-mainline: v5.15-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

shmem helpers seem a bit sloppy here by automatically rounding up when
actually creating the buffer, which results in under-reporting of what
we actually have. Caught by igt/vgem_basic tests.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210603164113.1433476-4-daniel.vetter@ffwll.ch
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 6d625cee7a6a..d5e6d4568f99 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -505,13 +505,13 @@ int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
 
 	if (!args->pitch || !args->size) {
 		args->pitch = min_pitch;
-		args->size = args->pitch * args->height;
+		args->size = PAGE_ALIGN(args->pitch * args->height);
 	} else {
 		/* ensure sane minimum values */
 		if (args->pitch < min_pitch)
 			args->pitch = min_pitch;
 		if (args->size < args->pitch * args->height)
-			args->size = args->pitch * args->height;
+			args->size = PAGE_ALIGN(args->pitch * args->height);
 	}
 
 	shmem = drm_gem_shmem_create_with_handle(file, dev, args->size, &args->handle);
-- 
2.38.1