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After commit25524b6190("fs/nls: Fix utf16 to utf8 conversion"), the return values of utf8_to_utf32() and utf32_to_utf8() are inconsistent when encountering an error: utf8_to_utf32() returns -1, while utf32_to_utf8() returns errno codes. Fix this inconsistency by modifying utf8_to_utf32() to return errno codes as well. Fixes:25524b6190("fs/nls: Fix utf16 to utf8 conversion") Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://patch.msgid.link/20251129111535.8984-1-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>