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[ Upstream commitdbaa310573] The function ioremap() in macio_init() can fail, so its return value should be checked. Fixes:36874579db("[PATCH] powerpc: macio-adb build fix") Reported-by: Hacash Robot <hacashRobot@santino.com> Signed-off-by: Xie Shaowen <studentxswpy@163.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220802074148.3213659-1-studentxswpy@163.com Signed-off-by: Sasha Levin <sashal@kernel.org>