greybus: protocol: name protocols.

We want to be able to "blame" a protocol for things at times, so give
them a name we can refer to them by.  Announce when they are added or
removed from the system so we have a chance to know what is going on
in the kernel logs.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Reviewed-by: Alex Elder <elder@linaro.org>

drivers/staging/greybus/battery-gb.c

@@ -359,6 +359,7 @@ static void gb_battery_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol battery_protocol = {
+	.name			= "battery",
 	.id			= GREYBUS_PROTOCOL_BATTERY,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/gpio-gb.c

@@ -524,6 +524,7 @@ static void gb_gpio_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol gpio_protocol = {
+	.name			= "gpio",
 	.id			= GREYBUS_PROTOCOL_GPIO,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/i2c-gb.c

@@ -430,6 +430,7 @@ static void gb_i2c_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol i2c_protocol = {
+	.name			= "i2c",
 	.id			= GREYBUS_PROTOCOL_I2C,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/protocol.c

@@ -7,6 +7,8 @@
  * Released under the GPLv2 only.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include "greybus.h"
 
 /* Global list of registered protocols */
@@ -86,6 +88,8 @@ int __gb_protocol_register(struct gb_protocol *protocol, struct module *module)
 	list_add_tail(&protocol->links, &existing->links);
 	spin_unlock_irq(&gb_protocols_lock);
 
+	pr_info("Registered %s protocol.\n", protocol->name);
+
 	/*
 	 * Go try to bind any unbound connections, as we have a
 	 * new protocol in the system
@@ -124,6 +128,9 @@ int gb_protocol_deregister(struct gb_protocol *protocol)
 	}
 	spin_unlock_irq(&gb_protocols_lock);
 
+	if (protocol)
+		pr_info("Deregistered %s protocol.\n", protocol->name);
+
 	return protocol && !protocol_count;
 }
 EXPORT_SYMBOL_GPL(gb_protocol_deregister);

drivers/staging/greybus/protocol.h

@@ -35,6 +35,7 @@ struct gb_protocol {
 	gb_connection_exit_t	connection_exit;
 	gb_request_recv_t	request_recv;
 	struct module		*owner;
+	char			*name;
 };
 
 int __gb_protocol_register(struct gb_protocol *protocol, struct module *module);

drivers/staging/greybus/pwm-gb.c

@@ -311,6 +311,7 @@ static void gb_pwm_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol pwm_protocol = {
+	.name			= "pwm",
 	.id			= GREYBUS_PROTOCOL_PWM,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/sdio-gb.c

@@ -79,6 +79,7 @@ static void gb_sdio_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol sdio_protocol = {
+	.name			= "sdio",
 	.id			= GREYBUS_PROTOCOL_SDIO,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/uart-gb.c

@@ -767,6 +767,7 @@ static void gb_tty_exit(void)
 }
 
 static struct gb_protocol uart_protocol = {
+	.name			= "uart",
 	.id			= GREYBUS_PROTOCOL_UART,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/usb-gb.c

@@ -376,6 +376,7 @@ static void gb_usb_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol usb_protocol = {
+	.name			= "usb",
 	.id			= GREYBUS_PROTOCOL_USB,
 	.major			= 0,
 	.minor			= 1,

drivers/staging/greybus/vibrator-gb.c

@@ -197,6 +197,7 @@ static void gb_vibrator_connection_exit(struct gb_connection *connection)
 }
 
 static struct gb_protocol vibrator_protocol = {
+	.name			= "vibrator",
 	.id			= GREYBUS_PROTOCOL_VIBRATOR,
 	.major			= 0,
 	.minor			= 1,