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authorPeter Hurley <peter@hurleysoftware.com>2014-10-16 13:54:36 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-05 16:14:09 -0800
commit494c1eac7e73f719af9d474a96ec8494c33efd6a (patch)
treea89baeb96c6d5ccdd295ac246d0f21f7869d0c75
parent37b164578826406a173ca7c20d9ba7430134d23e (diff)
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tty: Prevent "read/write wait queue active!" log flooding
Only print one warning when a task is on the read_wait or write_wait wait queue at final tty release. Cc: <stable@vger.kernel.org> # 3.4.x+ Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/tty/tty_io.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 4021c10d9908..0508a1d8e4cd 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1710,6 +1710,7 @@ int tty_release(struct inode *inode, struct file *filp)
int idx;
char buf[64];
long timeout = 0;
+ int once = 1;
if (tty_paranoia_check(tty, inode, __func__))
return 0;
@@ -1790,8 +1791,11 @@ int tty_release(struct inode *inode, struct file *filp)
if (!do_sleep)
break;
- printk(KERN_WARNING "%s: %s: read/write wait queue active!\n",
- __func__, tty_name(tty, buf));
+ if (once) {
+ once = 0;
+ printk(KERN_WARNING "%s: %s: read/write wait queue active!\n",
+ __func__, tty_name(tty, buf));
+ }
tty_unlock_pair(tty, o_tty);
mutex_unlock(&tty_mutex);
schedule_timeout_killable(timeout);