Hi,
I found it was incorrect. So please IGNORE this patch.
Sorry for that.
On 12/09/2013 11:20 AM, Li, Zhen-Hua wrote:
In function tty_release, there are two unlock not called while
breaking from a while. This may cause problems.
This patch fixed this problem , adding the two unlocks before
break is called.
Signed-off-by: Li, Zhen-Hua <zhen-h...@hp.com>
---
drivers/tty/tty_io.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index c74a00a..d41b0da 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1777,9 +1777,11 @@ int tty_release(struct inode *inode, struct file *filp)
do_sleep++;
}
}
- if (!do_sleep)
+ if (!do_sleep) {
+ tty_unlock_pair(tty, o_tty);
+ mutex_unlock(&tty_mutex);
break;
-
+ }
printk(KERN_WARNING "%s: %s: read/write wait queue active!\n",
__func__, tty_name(tty, buf));
tty_unlock_pair(tty, o_tty);
--
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