[PATCH] Char: stallion, fix fail paths
Release everything what was allocated and check return value of isa probing.
Release only ISA boards in module exit, since pci have their own
pci-probing-remove.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index 4ccf4a5..7612464 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -143,6 +143,8 @@
* Not really much here!
*/
#define BRD_FOUND 0x1
+#define STL_PROBED 0x2
+
/*
* Define the port structure istate flags. These set of flags are
@@ -2388,6 +2390,7 @@
goto err_fr;
}
brdp->brdtype = brdtype;
+ brdp->state |= STL_PROBED;
/*
* We have all resources from the board, so let's setup the actual
@@ -4677,6 +4680,28 @@
}
}
+static void stl_free_isabrds(void)
+{
+ struct stlbrd *brdp;
+ unsigned int i;
+
+ for (i = 0; i < stl_nrbrds; i++) {
+ if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
+ continue;
+
+ free_irq(brdp->irq, brdp);
+
+ stl_cleanup_panels(brdp);
+
+ release_region(brdp->ioaddr1, brdp->iosize1);
+ if (brdp->iosize2 > 0)
+ release_region(brdp->ioaddr2, brdp->iosize2);
+
+ kfree(brdp);
+ stl_brds[i] = NULL;
+ }
+}
+
/*
* Loadable module initialization stuff.
*/
@@ -4684,7 +4709,8 @@
{
struct stlbrd *brdp;
struct stlconf conf;
- unsigned int i, retval;
+ unsigned int i;
+ int retval;
printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
@@ -4714,12 +4740,14 @@
}
retval = pci_register_driver(&stl_pcidriver);
- if (retval)
+ if (retval && stl_nrbrds == 0)
goto err;
stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
- if (!stl_serial)
- return -1;
+ if (!stl_serial) {
+ retval = -ENOMEM;
+ goto err_pcidr;
+ }
/*
* Set up a character driver for per board stuff. This is mainly used
@@ -4729,6 +4757,10 @@
printk("STALLION: failed to register serial board device\n");
stallion_class = class_create(THIS_MODULE, "staliomem");
+ if (IS_ERR(stallion_class)) {
+ retval = PTR_ERR(stallion_class);
+ goto err_reg;
+ }
for (i = 0; i < 4; i++)
class_device_create(stallion_class, NULL,
MKDEV(STL_SIOMEMMAJOR, i), NULL,
@@ -4745,20 +4777,29 @@
stl_serial->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(stl_serial, &stl_ops);
- if (tty_register_driver(stl_serial)) {
- put_tty_driver(stl_serial);
+ retval = tty_register_driver(stl_serial);
+ if (retval) {
printk("STALLION: failed to register serial driver\n");
- return -1;
+ goto err_clsdev;
}
return 0;
+err_clsdev:
+ for (i = 0; i < 4; i++)
+ class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
+ class_destroy(stallion_class);
+err_reg:
+ unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
+ put_tty_driver(stl_serial);
+err_pcidr:
+ pci_unregister_driver(&stl_pcidriver);
+ stl_free_isabrds();
err:
return retval;
}
static void __exit stallion_module_exit(void)
{
- struct stlbrd *brdp;
int i;
pr_debug("cleanup_module()\n");
@@ -4772,13 +4813,9 @@
* a hangup on every open port - to try to flush out any processes
* hanging onto ports.
*/
- i = tty_unregister_driver(stl_serial);
+ tty_unregister_driver(stl_serial);
put_tty_driver(stl_serial);
- if (i) {
- printk("STALLION: failed to un-register tty driver, "
- "errno=%d\n", -i);
- return;
- }
+
for (i = 0; i < 4; i++)
class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
@@ -4788,21 +4825,7 @@
pci_unregister_driver(&stl_pcidriver);
- for (i = 0; (i < stl_nrbrds); i++) {
- if ((brdp = stl_brds[i]) == NULL)
- continue;
-
- free_irq(brdp->irq, brdp);
-
- stl_cleanup_panels(brdp);
-
- release_region(brdp->ioaddr1, brdp->iosize1);
- if (brdp->iosize2 > 0)
- release_region(brdp->ioaddr2, brdp->iosize2);
-
- kfree(brdp);
- stl_brds[i] = NULL;
- }
+ stl_free_isabrds();
}
module_init(stallion_module_init);