The "un->un_open_count" is unsigned variable, so it cannot
be less than zero.
Signed-off-by: Daeseok Youn <daeseok.youn@xxxxxxxxx>
---
drivers/staging/dgnc/dgnc_tty.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index 8081621..f7409d9 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1636,10 +1636,10 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file)
un->un_open_count = 1;
}
- if (--un->un_open_count < 0) {
+ if (un->un_open_count)
+ un->un_open_count--;
+ else
APR(("bad serial port open count of %d\n", un->un_open_count));
- un->un_open_count = 0;
- }
ch->ch_open_count--;
--
1.7.1
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