From c706ebdfc8955b850e477255a8c0f93f9f14712d Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Tue, 2 Jun 2009 11:54:11 -0400
Subject: USB: usb-serial: call port_probe and port_remove at the right times
This patch (as1253) prevents the usb-serial core from calling a
driver's port_probe and port_remove methods more than once per port.
It also removes some unnecessary try_module_get() calls and adds a
missing port_remove method call in a failure path.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
include/linux/usb/serial.h | 8 ++++++++
1 file changed, 8 insertions(+)
(limited to 'include/linux')
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index e29ebcf3287b..ed4aa0fa7ed8 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -27,6 +27,13 @@
/* parity check flag */
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+enum port_dev_state {
+ PORT_UNREGISTERED,
+ PORT_REGISTERING,
+ PORT_REGISTERED,
+ PORT_UNREGISTERING,
+};
+
/**
* usb_serial_port: structure for the specific ports of a device.
* @serial: pointer back to the struct usb_serial owner of this port.
@@ -102,6 +109,7 @@ struct usb_serial_port {
char console;
unsigned long sysrq; /* sysrq timeout */
struct device dev;
+ enum port_dev_state dev_state;
};
#define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
--
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