staging: dgap: tty.c: removes smatch warnings "redundant null check"

This patch removes these smatch warnings:
redundant null check on dgap_TmpWriteBuf calling kfree()
redundant null check on brd->SerialDriver->ttys calling kfree()
redundant null check on brd->PrintDriver->ttys calling kfree()

The code checked to see if these variables are null
before freeing. This check isn't needed.

Signed-off-by: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/dgap/dgap_tty.c b/drivers/staging/dgap/dgap_tty.c
index 7f909b8..924e2bf 100644 (file)
--- a/drivers/staging/dgap/dgap_tty.c
+++ b/drivers/staging/dgap/dgap_tty.c
@@ -497,10 +497,8 @@ int dgap_tty_init(struct board_t *brd)
  */
 void dgap_tty_post_uninit(void)
 {
-       if (dgap_TmpWriteBuf) {
-               kfree(dgap_TmpWriteBuf);
-               dgap_TmpWriteBuf = NULL;
-       }
+       kfree(dgap_TmpWriteBuf);
+       dgap_TmpWriteBuf = NULL;
 }
 
 
@@ -522,10 +520,8 @@ void dgap_tty_uninit(struct board_t *brd)
                        tty_unregister_device(brd->SerialDriver, i);
                }
                tty_unregister_driver(brd->SerialDriver);
-               if (brd->SerialDriver->ttys) {
-                       kfree(brd->SerialDriver->ttys);
-                       brd->SerialDriver->ttys = NULL;
-               }
+               kfree(brd->SerialDriver->ttys);
+               brd->SerialDriver->ttys = NULL;
                put_tty_driver(brd->SerialDriver);
                brd->dgap_Major_Serial_Registered = FALSE;
        }
@@ -538,10 +534,8 @@ void dgap_tty_uninit(struct board_t *brd)
                        tty_unregister_device(brd->PrintDriver, i);
                }
                tty_unregister_driver(brd->PrintDriver);
-               if (brd->PrintDriver->ttys) {
-                       kfree(brd->PrintDriver->ttys);
-                       brd->PrintDriver->ttys = NULL;
-               }
+               kfree(brd->PrintDriver->ttys);
+               brd->PrintDriver->ttys = NULL;
                put_tty_driver(brd->PrintDriver);
                brd->dgap_Major_TransparentPrint_Registered = FALSE;
        }