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TTY: hvcs, clean hvcs_open a bit

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Make the code of hvcs_open a bit more readable by:
- moving all assignments out of if's
- redoing fail paths so that corresponding pieces are nearby
- we need only one of retval and rc

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-08-07 21:48:05 +02:00 committed by Greg Kroah-Hartman
parent bdb498c200
commit 97d1508985
1 changed files with 17 additions and 15 deletions
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32
drivers/tty/hvc/hvcs.c
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@ -1109,11 +1109,10 @@ static struct hvcs_struct *hvcs_get_by_index(int index)
static int hvcs_open(struct tty_struct *tty, struct file *filp)
{
struct hvcs_struct *hvcsd;
int rc, retval = 0;
unsigned long flags;
unsigned int irq;
struct vio_dev *vdev;
unsigned long unit_address;
unsigned long unit_address, flags;
unsigned int irq;
int retval;
if (tty->driver_data)
goto fast_open;
@ -1122,7 +1121,8 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
* Is there a vty-server that shares the same index?
* This function increments the kref index.
*/
if (!(hvcsd = hvcs_get_by_index(tty->index))) {
hvcsd = hvcs_get_by_index(tty->index);
if (!hvcsd) {
printk(KERN_WARNING "HVCS: open failed, no device associated"
" with tty->index %d.\n", tty->index);
return -ENODEV;
@ -1130,9 +1130,14 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
spin_lock_irqsave(&hvcsd->lock, flags);
if (hvcsd->connected == 0)
if ((retval = hvcs_partner_connect(hvcsd)))
goto error_release;
if (hvcsd->connected == 0) {
retval = hvcs_partner_connect(hvcsd);
if (retval) {
spin_unlock_irqrestore(&hvcsd->lock, flags);
printk(KERN_WARNING "HVCS: partner connect failed.\n");
goto err_put;
}
}
hvcsd->port.count = 1;
hvcsd->port.tty = tty;
@ -1155,10 +1160,10 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
* This must be done outside of the spinlock because it requests irqs
* and will grab the spinlock and free the connection if it fails.
*/
if (((rc = hvcs_enable_device(hvcsd, unit_address, irq, vdev)))) {
tty_port_put(&hvcsd->port);
retval = hvcs_enable_device(hvcsd, unit_address, irq, vdev);
if (retval) {
printk(KERN_WARNING "HVCS: enable device failed.\n");
return rc;
goto err_put;
}
goto open_success;
@ -1179,12 +1184,9 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
hvcsd->vdev->unit_address );
return 0;
error_release:
spin_unlock_irqrestore(&hvcsd->lock, flags);
err_put:
tty_port_put(&hvcsd->port);
printk(KERN_WARNING "HVCS: partner connect failed.\n");
return retval;
}