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[ Upstream commitd3601857e1] This error handling looks really strange. Check if the string has been truncated instead. Fixes:f0c2319f9f("regmap: Expose the driver name in debugfs") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/8595de2462c490561f70020a6d11f4d6b652b468.1693857825.git.christophe.jaillet@wanadoo.fr Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>