USB: Remove redundant test in pxa27x_udc and ftdi_sio

priv is checked not to be NULL near the beginning of the function and not
changed subsequently, making the test redundant.

A simplified version of the semantic patch that makes this change is as
follows: (http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
expression E;
position p1,p2;
@@

if (x@p1 == NULL || ...) { ... when forall
   return ...; }
... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
x@p2 == NULL
|
x@p2 != NULL
)

// another path to the test that is not through p1?
@s exists@
local idexpression r.x;
position r.p1,r.p2;
@@

... when != x@p1
(
x@p2 == NULL
|
x@p2 != NULL
)

@fix depends on !s@
position r.p1,r.p2;
expression x,E;
statement S1,S2;
@@

(
- if ((x@p2 != NULL) || ...)
  S1
|
- if ((x@p2 == NULL) && ...) S1
|
- BUG_ON(x@p2 == NULL);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 9 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index ae84c326a540..d889216bcb30 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1938,15 +1938,13 @@ static void ftdi_process_read(struct work_struct *work)
                 /* Compare new line status to the old one, signal if different/
                    N.B. packet may be processed more than once, but differences
                    are only processed once.  */
-                if (priv != NULL) {
-                        char new_status = data[packet_offset + 0] &
-                                                        FTDI_STATUS_B0_MASK;
-                        if (new_status != priv->prev_status) {
-                                priv->diff_status |=
-                                        new_status ^ priv->prev_status;
-                                wake_up_interruptible(&priv->delta_msr_wait);
-                                priv->prev_status = new_status;
-                        }
+                char new_status = data[packet_offset + 0] &
+                                                FTDI_STATUS_B0_MASK;
+                if (new_status != priv->prev_status) {
+                        priv->diff_status |=
+                                new_status ^ priv->prev_status;
+                        wake_up_interruptible(&priv->delta_msr_wait);
+                        priv->prev_status = new_status;
                 }
 
                 length = min(PKTSZ, urb->actual_length-packet_offset)-2;