tree ab7fee5fd318a8810af45b2501b284b16cc948d4
parent fbee0b5c20694402c6a4cb36a9ac480c3bf5c71d
author Juergen Gross <jgross@suse.com> 1638188251 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1638949505 +0100

tty: hvc: replace BUG_ON() with negative return value

commit e679004dec37566f658a255157d3aed9d762a2b7 upstream.

Xen frontends shouldn't BUG() in case of illegal data received from
their backends. So replace the BUG_ON()s when reading illegal data from
the ring page with negative return values.

Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20210707091045.460-1-jgross@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>