Please ignore this patch. On Fri, Sep 14, 2012 at 5:13 PM, Peter Senna Tschudin <peter.senna@xxxxxxxxx> wrote: > From: Peter Senna Tschudin <peter.senna@xxxxxxxxx> > > Remove useless kfree() and clean up code related to the removal. > > The semantic patch that finds this problem is as follows: > (http://coccinelle.lip6.fr/) > > // <smpl> > @r exists@ > position p1,p2; > expression x; > @@ > > if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; } > > @unchanged exists@ > position r.p1,r.p2; > expression e <= r.x,x,e1; > iterator I; > statement S; > @@ > > if (x@p1 == NULL) { ... when != I(x,...) S > when != e = e1 > when != e += e1 > when != e -= e1 > when != ++e > when != --e > when != e++ > when != e-- > when != &e > kfree@p2(x); ... return ...; } > > @ok depends on unchanged exists@ > position any r.p1; > position r.p2; > expression x; > @@ > > ... when != true x@p1 == NULL > kfree@p2(x); > > @depends on !ok && unchanged@ > position r.p2; > expression x; > @@ > > *kfree@p2(x); > // </smpl> > > Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxx> > > --- > drivers/staging/gdm72xx/gdm_sdio.c | 13 ++++--------- > 1 file changed, 4 insertions(+), 9 deletions(-) > > diff --git a/drivers/staging/gdm72xx/gdm_sdio.c b/drivers/staging/gdm72xx/gdm_sdio.c > index f824290..2e1a964 100644 > --- a/drivers/staging/gdm72xx/gdm_sdio.c > +++ b/drivers/staging/gdm72xx/gdm_sdio.c > @@ -91,20 +91,15 @@ static void free_tx_struct(struct sdio_tx *t) > > static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx) > { > - struct sdio_rx *r = NULL; > - > - r = kmalloc(sizeof(*r), GFP_ATOMIC); > - if (r == NULL) > - goto out; > + struct sdio_rx *r; > > - memset(r, 0, sizeof(*r)); > + r = kzalloc(sizeof(*r), GFP_ATOMIC); > + if (!r) > + return NULL; > > r->rx_cxt = rx; > > return r; > -out: > - kfree(r); > - return NULL; > } > > static void free_rx_struct(struct sdio_rx *r) > -- Peter _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
