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authorTilman Schmidt <tilman@imap.cc>2008-02-06 01:38:29 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:12 -0800
commite468c04894f36045cf93d1384183a461014b6840 (patch)
treeb734bbc4ee65f8282de5299dc200f47ea466067a /drivers/isdn/gigaset/usb-gigaset.c
parent9d4bee2b9de9e30057a860d2d6794f874caffc5e (diff)
Gigaset: permit module unload
Fix the initialization and reference counting of the Gigaset driver modules so that they can be unloaded when they are not actually in use. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Cc: Hansjoerg Lipp <hjlipp@web.de> Cc: Greg KH <gregkh@suse.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/isdn/gigaset/usb-gigaset.c')
-rw-r--r--drivers/isdn/gigaset/usb-gigaset.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index c58ddee68de..77d20ab0cd4 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -115,7 +115,6 @@ static int gigaset_resume(struct usb_interface *intf);
static int gigaset_pre_reset(struct usb_interface *intf);
static struct gigaset_driver *driver = NULL;
-static struct cardstate *cardstate = NULL;
/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver gigaset_usb_driver = {
@@ -727,11 +726,10 @@ static int gigaset_probe(struct usb_interface *interface,
dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
- cs = gigaset_getunassignedcs(driver);
- if (!cs) {
- dev_warn(&udev->dev, "no free cardstate\n");
+ /* allocate memory for our device state and intialize it */
+ cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
+ if (!cs)
return -ENODEV;
- }
ucs = cs->hw.usb;
/* save off device structure ptrs for later use */
@@ -818,7 +816,7 @@ error:
usb_put_dev(ucs->udev);
ucs->udev = NULL;
ucs->interface = NULL;
- gigaset_unassign(cs);
+ gigaset_freecs(cs);
return retval;
}
@@ -852,7 +850,7 @@ static void gigaset_disconnect(struct usb_interface *interface)
ucs->interface = NULL;
ucs->udev = NULL;
cs->dev = NULL;
- gigaset_unassign(cs);
+ gigaset_freecs(cs);
}
/* gigaset_suspend
@@ -934,11 +932,6 @@ static int __init usb_gigaset_init(void)
&ops, THIS_MODULE)) == NULL)
goto error;
- /* allocate memory for our device state and intialize it */
- cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
- if (!cardstate)
- goto error;
-
/* register this driver with the USB subsystem */
result = usb_register(&gigaset_usb_driver);
if (result < 0) {
@@ -951,9 +944,7 @@ static int __init usb_gigaset_init(void)
info(DRIVER_DESC);
return 0;
-error: if (cardstate)
- gigaset_freecs(cardstate);
- cardstate = NULL;
+error:
if (driver)
gigaset_freedriver(driver);
driver = NULL;
@@ -967,11 +958,16 @@ error: if (cardstate)
*/
static void __exit usb_gigaset_exit(void)
{
+ int i;
+
gigaset_blockdriver(driver); /* => probe will fail
* => no gigaset_start any more
*/
- gigaset_shutdown(cardstate);
+ /* stop all connected devices */
+ for (i = 0; i < driver->minors; i++)
+ gigaset_shutdown(driver->cs + i);
+
/* from now on, no isdn callback should be possible */
/* deregister this driver with the USB subsystem */
@@ -979,8 +975,6 @@ static void __exit usb_gigaset_exit(void)
/* this will call the disconnect-callback */
/* from now on, no disconnect/probe callback should be running */
- gigaset_freecs(cardstate);
- cardstate = NULL;
gigaset_freedriver(driver);
driver = NULL;
}