From 2ec4e84a5fabfb08b03644a9f89ba1d9bb7f34b1 Mon Sep 17 00:00:00 2001 From: Himangi Saraogi Date: Tue, 15 Jul 2014 18:29:53 -0300 Subject: [PATCH] [media] saa7164-dvb: Remove unnecessary null test This patch removes the null test on dvb. dvb is initialized at the beginning of the function to &port->dvb. Since port is dereferenced prior to the null test, port must be a valid pointer, and &port->dvb cannot be null. The following Coccinelle script is used for detecting the change: @r@ expression e,f; identifier g,y; statement S1,S2; @@ *e = &f->g <+... f->y ...+> *if (e != NULL || ...) S1 else S2 Signed-off-by: Himangi Saraogi Acked-by: Julia Lawall Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/saa7164/saa7164-dvb.c | 32 +++++++++++-------------- 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/drivers/media/pci/saa7164/saa7164-dvb.c b/drivers/media/pci/saa7164/saa7164-dvb.c index 5c5cc3ebf9bd..16ae71592e8c 100644 --- a/drivers/media/pci/saa7164/saa7164-dvb.c +++ b/drivers/media/pci/saa7164/saa7164-dvb.c @@ -242,16 +242,14 @@ static int saa7164_dvb_start_feed(struct dvb_demux_feed *feed) if (!demux->dmx.frontend) return -EINVAL; - if (dvb) { - mutex_lock(&dvb->lock); - if (dvb->feeding++ == 0) { - /* Start transport */ - ret = saa7164_dvb_start_port(port); - } - mutex_unlock(&dvb->lock); - dprintk(DBGLVL_DVB, "%s(port=%d) now feeding = %d\n", - __func__, port->nr, dvb->feeding); + mutex_lock(&dvb->lock); + if (dvb->feeding++ == 0) { + /* Start transport */ + ret = saa7164_dvb_start_port(port); } + mutex_unlock(&dvb->lock); + dprintk(DBGLVL_DVB, "%s(port=%d) now feeding = %d\n", + __func__, port->nr, dvb->feeding); return ret; } @@ -266,16 +264,14 @@ static int saa7164_dvb_stop_feed(struct dvb_demux_feed *feed) dprintk(DBGLVL_DVB, "%s(port=%d)\n", __func__, port->nr); - if (dvb) { - mutex_lock(&dvb->lock); - if (--dvb->feeding == 0) { - /* Stop transport */ - ret = saa7164_dvb_stop_streaming(port); - } - mutex_unlock(&dvb->lock); - dprintk(DBGLVL_DVB, "%s(port=%d) now feeding = %d\n", - __func__, port->nr, dvb->feeding); + mutex_lock(&dvb->lock); + if (--dvb->feeding == 0) { + /* Stop transport */ + ret = saa7164_dvb_stop_streaming(port); } + mutex_unlock(&dvb->lock); + dprintk(DBGLVL_DVB, "%s(port=%d) now feeding = %d\n", + __func__, port->nr, dvb->feeding); return ret; } -- 2.20.1