mcp9982_write() updates interval_idx before writing the conversion-rate register. If the write fails without changing the register, subsequent update_interval reads report the requested interval instead of the previous setting. Update interval_idx only after regmap_write() succeeds, leaving the previous cached interval in place on error. Fixes: e2fe950f34e5 ("hwmon: add support for MCP998X") Cc: stable@vger.kernel.org Signed-off-by: Baek Kyu, Kim <pocj8ur4in@gmail.com> Acked-by: Duicu Victor <victor.duicu@microchip.com> Link: https://patch.msgid.link/20261018055750.1318723-1-pocj8ur4in@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>