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fs3270: Correct error returns

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Drop the kernel lock further and also correct cases where we set rc to an
error code, and then return 0

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-13 10:46:09 +01:00 committed by Linus Torvalds
parent a90610e50b
commit a18992d465
1 changed files with 4 additions and 5 deletions
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9
drivers/s390/char/fs3270.c
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@ -418,23 +418,22 @@ fs3270_open(struct inode *inode, struct file *filp)
{
struct fs3270 *fp;
struct idal_buffer *ib;
int minor, rc;
int minor, rc = 0;
if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR)
return -ENODEV;
lock_kernel();
minor = iminor(filp->f_path.dentry->d_inode);
/* Check for minor 0 multiplexer. */
if (minor == 0) {
struct tty_struct *tty = get_current_tty();
if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
tty_kref_put(tty);
rc = -ENODEV;
goto out;
return -ENODEV;
}
minor = tty->index + RAW3270_FIRSTMINOR;
tty_kref_put(tty);
}
lock_kernel();
/* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
if (!IS_ERR(fp)) {
@ -476,7 +475,7 @@ fs3270_open(struct inode *inode, struct file *filp)
filp->private_data = fp;
out:
unlock_kernel();
return 0;
return rc;
}
/*