platform/chrome: cros_ec_lpc_mec: remove cros_ec_lpc_mec_destroy()

It's pointless (and invalid) to destroy a statically allocated mutex in
cros_ec_lpc_mec_destroy().

Let's remove it.
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20221031050657.3899359-1-tzungbi@kernel.org

drivers/platform/chrome/cros_ec_lpc.c

@@ -593,7 +593,6 @@ static int __init cros_ec_lpc_init(void)
 	ret = platform_driver_register(&cros_ec_lpc_driver);
 	if (ret) {
 		pr_err(DRV_NAME ": can't register driver: %d\n", ret);
-		cros_ec_lpc_mec_destroy();
 		return ret;
 	}
 
@@ -603,7 +602,6 @@ static int __init cros_ec_lpc_init(void)
 		if (ret) {
 			pr_err(DRV_NAME ": can't register device: %d\n", ret);
 			platform_driver_unregister(&cros_ec_lpc_driver);
-			cros_ec_lpc_mec_destroy();
 		}
 	}
 
@@ -615,7 +613,6 @@ static void __exit cros_ec_lpc_exit(void)
 	if (!cros_ec_lpc_acpi_device_found)
 		platform_device_unregister(&cros_ec_lpc_device);
 	platform_driver_unregister(&cros_ec_lpc_driver);
-	cros_ec_lpc_mec_destroy();
 }
 
 module_init(cros_ec_lpc_init);

drivers/platform/chrome/cros_ec_lpc_mec.c

@@ -146,9 +146,3 @@ void cros_ec_lpc_mec_init(unsigned int base, unsigned int end)
 	mec_emi_end = end;
 }
 EXPORT_SYMBOL(cros_ec_lpc_mec_init);
-
-void cros_ec_lpc_mec_destroy(void)
-{
-	mutex_destroy(&io_mutex);
-}
-EXPORT_SYMBOL(cros_ec_lpc_mec_destroy);

drivers/platform/chrome/cros_ec_lpc_mec.h

@@ -45,13 +45,6 @@ enum cros_ec_lpc_mec_io_type {
  */
 void cros_ec_lpc_mec_init(unsigned int base, unsigned int end);
 
-/*
- * cros_ec_lpc_mec_destroy
- *
- * Cleanup MEC I/O.
- */
-void cros_ec_lpc_mec_destroy(void);
-
 /**
  * cros_ec_lpc_mec_in_range() - Determine if addresses are in MEC EMI range.
  *

drivers/platform/chrome/wilco_ec/core.c

@@ -129,7 +129,6 @@ static int wilco_ec_probe(struct platform_device *pdev)
 unregister_debugfs:
 	if (ec->debugfs_pdev)
 		platform_device_unregister(ec->debugfs_pdev);
-	cros_ec_lpc_mec_destroy();
 	return ret;
 }
 
@@ -143,10 +142,6 @@ static int wilco_ec_remove(struct platform_device *pdev)
 	platform_device_unregister(ec->rtc_pdev);
 	if (ec->debugfs_pdev)
 		platform_device_unregister(ec->debugfs_pdev);
-
-	/* Teardown cros_ec interface */
-	cros_ec_lpc_mec_destroy();
-
 	return 0;
 }