unsigned hp->count cannot be negative
Signed-off-by: Roel Kluin <[EMAIL PROTECTED]>
---
Similar to the previous patch but with lock. For hvc_struct, see
vi drivers/char/hvc_console.h +47
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 5b819b1..337f6c6 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -366,7 +366,8 @@ static void hvc_close(struct tty_struct *tty, struct file *
filp)
hp = tty->driver_data;
spin_lock_irqsave(&hp->lock, flags);
- if (--hp->count == 0) {
+ if (hp->count == 1) {
+ hp->count--;
/* We are done with the tty pointer now. */
hp->tty = NULL;
spin_unlock_irqrestore(&hp->lock, flags);
@@ -384,7 +385,9 @@ static void hvc_close(struct tty_struct *tty, struct file *
filp)
*/
tty_wait_until_sent(tty, HVC_CLOSE_WAIT);
} else {
- if (hp->count < 0)
+ if (hp->count > 1)
+ hp->count--;
+ else
printk(KERN_ERR "hvc_close %X: oops, count is %d\n",
hp->vtermno, hp->count);
spin_unlock_irqrestore(&hp->lock, flags);
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