staging: dgnc: change style of NULL comparison

Change the NULL comparison style as warned by checkpatch.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index cdc78f80c9186b3357da99fdfb5437b823a3ae38..a8d50a542ad5fc6da71440745980830159b33477 100644 (file)
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1553,7 +1553,7 @@ static int dgnc_tty_chars_in_buffer(struct tty_struct *tty)
        uint chars = 0;
        unsigned long flags;
 
-       if (tty == NULL)
+       if (!tty)
                return 0;
 
        un = tty->driver_data;
@@ -1658,7 +1658,7 @@ static int dgnc_tty_write_room(struct tty_struct *tty)
        int ret = 0;
        unsigned long flags;
 
-       if (tty == NULL || dgnc_TmpWriteBuf == NULL)
+       if (!tty || !dgnc_TmpWriteBuf)
                return 0;
 
        un = tty->driver_data;
@@ -1739,7 +1739,7 @@ static int dgnc_tty_write(struct tty_struct *tty,
        ushort tmask;
        uint remain;
 
-       if (tty == NULL || dgnc_TmpWriteBuf == NULL)
+       if (!tty || !dgnc_TmpWriteBuf)
                return 0;
 
        un = tty->driver_data;