diff options
| author | Steve French <sfrench@us.ibm.com> | 2006-02-15 03:36:31 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2006-02-15 03:36:31 +0000 |
| commit | 0ed3f64ec3a7ad29e83e03607115eeffa32f553c (patch) | |
| tree | 528681b043e947cfc51527d56098f586b6dfa217 /drivers/char/tipar.c | |
| parent | 5815449d1bfcb22f74b0e36a8b0631d6584cb7fc (diff) | |
| parent | 10ee39fe3ff618d274e1cd0f6abbc2917b736bfd (diff) | |
Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'drivers/char/tipar.c')
| -rw-r--r-- | drivers/char/tipar.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/char/tipar.c b/drivers/char/tipar.c index 41a94bc79f6..eb2eb3e12d6 100644 --- a/drivers/char/tipar.c +++ b/drivers/char/tipar.c @@ -250,12 +250,17 @@ tipar_open(struct inode *inode, struct file *file) { unsigned int minor = iminor(inode) - TIPAR_MINOR; - if (minor > tp_count - 1) + if (tp_count == 0 || minor > tp_count - 1) return -ENXIO; if (test_and_set_bit(minor, &opened)) return -EBUSY; + if (!table[minor].dev) { + printk(KERN_ERR "%s: NULL device for minor %u\n", + __FUNCTION__, minor); + return -ENXIO; + } parport_claim_or_block(table[minor].dev); init_ti_parallel(minor); parport_release(table[minor].dev); @@ -510,16 +515,20 @@ tipar_init_module(void) err = PTR_ERR(tipar_class); goto out_chrdev; } - if (parport_register_driver(&tipar_driver)) { + if (parport_register_driver(&tipar_driver) || tp_count == 0) { printk(KERN_ERR "tipar: unable to register with parport\n"); err = -EIO; - goto out; + goto out_class; } err = 0; goto out; +out_class: + class_destroy(tipar_class); + out_chrdev: + devfs_remove("ticables/par"); unregister_chrdev(TIPAR_MAJOR, "tipar"); out: return err; |