From 00185a60c37549531b9eee562d3eba19020875d5 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 21 Dec 2008 16:41:36 +0100 Subject: 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/) // @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); ) // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/ftdi_sio.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) (limited to 'drivers/usb/serial/ftdi_sio.c') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index ae84c326a54..d889216bcb3 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; -- cgit v1.2.3-70-g09d2