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fs3270: Correct error returns 

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
View File

@ -418,23 +418,22 @@ fs3270_open(struct inode *inode, struct file *filp)
{ {
struct fs3270 *fp; struct fs3270 *fp;
struct idal_buffer *ib; struct idal_buffer *ib;
int minor, rc; int minor, rc = 0;
if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR) if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR)
return -ENODEV; return -ENODEV;
lock_kernel();
minor = iminor(filp->f_path.dentry->d_inode); minor = iminor(filp->f_path.dentry->d_inode);
/* Check for minor 0 multiplexer. */ /* Check for minor 0 multiplexer. */
if (minor == 0) { if (minor == 0) {
struct tty_struct *tty = get_current_tty(); struct tty_struct *tty = get_current_tty();
if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
tty_kref_put(tty); tty_kref_put(tty);
rc = -ENODEV; return -ENODEV;
goto out;
} }
minor = tty->index + RAW3270_FIRSTMINOR; minor = tty->index + RAW3270_FIRSTMINOR;
tty_kref_put(tty); tty_kref_put(tty);
} }
lock_kernel();
/* Check if some other program is already using fullscreen mode. */ /* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
if (!IS_ERR(fp)) { if (!IS_ERR(fp)) {
@ -476,7 +475,7 @@ fs3270_open(struct inode *inode, struct file *filp)
filp->private_data = fp; filp->private_data = fp;
out: out:
unlock_kernel(); unlock_kernel();
return 0; return rc;
} }
/* /*