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authorJulia Lawall <julia@diku.dk>2008-12-21 16:41:36 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 16:20:28 -0700
commit00185a60c37549531b9eee562d3eba19020875d5 (patch)
tree1828b245fc183008f8e48838fdf0025ac11ffda0
parentdb5e6df172309c382982790aafa8cd87dc0b6292 (diff)
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>
-rw-r--r--drivers/usb/gadget/pxa27x_udc.c2
-rw-r--r--drivers/usb/serial/ftdi_sio.c16
2 files changed, 8 insertions, 10 deletions
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index e50419d..91ba1e9 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -279,7 +279,7 @@ static void pxa_init_debugfs(struct pxa_udc *udc)
goto err_queues;
eps = debugfs_create_file("epstate", 0400, root, udc,
&eps_dbg_fops);
- if (!queues)
+ if (!eps)
goto err_eps;
udc->debugfs_root = root;
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index ae84c32..d889216 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;