staging: gasket: core: debug log updates

Add debug logs for device enable/disable events, remove logs for
callbacks (the called functions can generate their own logs if needed).

Change-Id: I861077c3210452d9ac6606e973bac5c14eeef859
Signed-off-by: Todd Poynor <toddpoynor@google.com>
diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index fe55ab0..1cbae4d 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -109,8 +109,6 @@
 {
 	int ret = 0;
 
-	dev_dbg(gasket_dev->dev, "check_and_invoke_callback %p\n",
-		cb_function);
 	if (cb_function) {
 		mutex_lock(&gasket_dev->mutex);
 		ret = cb_function(gasket_dev);
@@ -126,11 +124,8 @@
 {
 	int ret = 0;
 
-	if (cb_function) {
-		dev_dbg(gasket_dev->dev,
-			"Invoking device-specific callback.\n");
+	if (cb_function)
 		ret = cb_function(gasket_dev);
-	}
 	return ret;
 }
 
@@ -633,6 +628,7 @@
 		gasket_dev->internal_desc->driver_desc;
 	int i;
 
+	dev_dbg(gasket_dev->dev, "disabling device\n");
 	/* Only delete the device if it has been successfully added. */
 	if (gasket_dev->dev_info.cdev_added)
 		cdev_del(&gasket_dev->dev_info.cdev);
@@ -1358,6 +1354,7 @@
 	const struct gasket_driver_desc *driver_desc =
 		gasket_dev->internal_desc->driver_desc;
 
+	dev_dbg(gasket_dev->dev, "enabling device\n");
 	ret = gasket_interrupt_init(gasket_dev);
 	if (ret) {
 		dev_err(gasket_dev->dev,