Backport of 166d38632316 ("xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE")

From: Demi Marie Obenour
Date: Fri Jul 22 2022 - 23:44:36 EST


This series backports upstream commit 166d3863231667c4f64dee72b77d1102cdfad11f
to all supported stable kernel trees.
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Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab