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[ Upstream commitee62360272] Clang static analyzer complains that value stored to 'rets' is never read.Let 'buf_len = -EOVERFLOW' to make sure we can return '-EOVERFLOW'. Fixes:8c8d964ce9("mei: move hbuf_depth from the mei device to the hw modules") Signed-off-by: Su Hui <suhui@nfschina.com> Link: https://lore.kernel.org/r/20231120095523.178385-2-suhui@nfschina.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>