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drm/vmwgfx: Use correct vmw_legacy_display_unit pointer 

The "entry" pointer is an offset from the list head and it doesn't
point to a valid vmw_legacy_display_unit struct.  Presumably the
intent was to point to the last entry.

Also the "i++" wasn't used so I have removed that as well.

Fixes: d7e1958dbe ("drm/vmwgfx: Support older hardware.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Dan Carpenter 2020-06-26 13:34:37 +03:00 committed by Roland Scheidegger
parent 4f88b4ccb7
commit 1d2c0c565b
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
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@ -81,7 +81,7 @@ static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
struct vmw_legacy_display_unit *entry;
struct drm_framebuffer *fb = NULL;
struct drm_crtc *crtc = NULL;
int i = 0;
int i;
/* If there is no display topology the host just assumes
* that the guest will set the same layout as the host.
@ -92,12 +92,11 @@ static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
crtc = &entry->base.crtc;
w = max(w, crtc->x + crtc->mode.hdisplay);
h = max(h, crtc->y + crtc->mode.vdisplay);
i++;
}
if (crtc == NULL)
return 0;
fb = entry->base.crtc.primary->state->fb;
fb = crtc->primary->state->fb;
return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
fb->format->cpp[0] * 8,