From 643ebb9ec0887f2ceab95c6935bac065e8f5ac00 Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld@intel.com>
Date: Fri, 4 Mar 2022 09:59:33 +0000
Subject: drm/i915/fbdev: fixup setting screen_size
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Git-commit: 892bfb8a604d464925edca9a5c3d2b2062c2124d
Patch-mainline: v5.19-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
Since we are actually mapping the object and not the vma, when dealing
with LMEM, we should be careful and use the backing store size here,
since the vma->node.size could have all kinds of funny padding
constraints, which could result in us writing to OOB address.
v2(Chris):
- Prefer vma->size here, which should be the backing store size. Some
more rework is needed here to stop using node.size in some other
places.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220304095934.925036-1-matthew.auld@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_fbdev.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 2cd62a187df3..221336178991 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -279,7 +279,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
/* Our framebuffer is the entirety of fbdev's system memory */
info->fix.smem_start =
(unsigned long)(ggtt->gmadr.start + vma->node.start);
- info->fix.smem_len = vma->node.size;
+ info->fix.smem_len = vma->size;
}
vaddr = i915_vma_pin_iomap(vma);
@@ -290,7 +290,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
goto out_unpin;
}
info->screen_base = vaddr;
- info->screen_size = vma->node.size;
+ info->screen_size = vma->size;
drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
--
2.38.1