summaryrefslogtreecommitdiff
path: root/drivers/char/epca.c
diff options
context:
space:
mode:
authorAkinobu Mita <akinobu.mita@gmail.com>2006-10-17 00:10:28 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-17 08:18:48 -0700
commitdabad0568a5935e9f4903f5fd1d8f22b1c7c88c7 (patch)
tree8f095cf80e83c01b3262451fc1c91b4ee22ff26f /drivers/char/epca.c
parentea6f94dfe9db4d19a39e774cfafa5c9428a9fdbc (diff)
[PATCH] epca: prevent panic on tty_register_driver() failure
Make epca fail on initialization failure instead of panic. Cc: "Digi International, Inc" <Eng.Linux@digi.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Alan Cox <alan@redhat.com> Acked-by: Scott Kilau <scottk@digi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/epca.c')
-rw-r--r--drivers/char/epca.c32
1 files changed, 23 insertions, 9 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index c3f95583a120..706733c0b36a 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -1157,6 +1157,7 @@ static int __init pc_init(void)
int crd;
struct board_info *bd;
unsigned char board_id = 0;
+ int err = -ENOMEM;
int pci_boards_found, pci_count;
@@ -1164,13 +1165,11 @@ static int __init pc_init(void)
pc_driver = alloc_tty_driver(MAX_ALLOC);
if (!pc_driver)
- return -ENOMEM;
+ goto out1;
pc_info = alloc_tty_driver(MAX_ALLOC);
- if (!pc_info) {
- put_tty_driver(pc_driver);
- return -ENOMEM;
- }
+ if (!pc_info)
+ goto out2;
/* -----------------------------------------------------------------------
If epca_setup has not been ran by LILO set num_cards to defaults; copy
@@ -1370,11 +1369,17 @@ static int __init pc_init(void)
} /* End for each card */
- if (tty_register_driver(pc_driver))
- panic("Couldn't register Digi PC/ driver");
+ err = tty_register_driver(pc_driver);
+ if (err) {
+ printk(KERN_ERR "Couldn't register Digi PC/ driver");
+ goto out3;
+ }
- if (tty_register_driver(pc_info))
- panic("Couldn't register Digi PC/ info ");
+ err = tty_register_driver(pc_info);
+ if (err) {
+ printk(KERN_ERR "Couldn't register Digi PC/ info ");
+ goto out4;
+ }
/* -------------------------------------------------------------------
Start up the poller to check for events on all enabled boards
@@ -1385,6 +1390,15 @@ static int __init pc_init(void)
mod_timer(&epca_timer, jiffies + HZ/25);
return 0;
+out4:
+ tty_unregister_driver(pc_driver);
+out3:
+ put_tty_driver(pc_info);
+out2:
+ put_tty_driver(pc_driver);
+out1:
+ return err;
+
} /* End pc_init */
/* ------------------ Begin post_fep_init ---------------------- */