2012/9/11 Peter Senna Tschudin <peter.senna@xxxxxxxxx>: > From: Peter Senna Tschudin <peter.senna@xxxxxxxxx> > > 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/media/dvb-frontends/dvb_dummy_fe.c | 21 ++++++--------------- > drivers/media/dvb-frontends/lg2160.c | 1 - > drivers/media/dvb-frontends/s5h1432.c | 6 +----- > drivers/media/dvb-frontends/s921.c | 7 +------ > drivers/media/dvb-frontends/stb6100.c | 6 +----- > drivers/media/dvb-frontends/tda665x.c | 6 +----- > drivers/media/platform/davinci/vpbe.c | 1 - > drivers/media/tuners/mt2063.c | 6 +----- > 8 files changed, 11 insertions(+), 43 deletions(-) > > diff --git a/drivers/media/dvb-frontends/dvb_dummy_fe.c b/drivers/media/dvb-frontends/dvb_dummy_fe.c > index dcfc902..465068f 100644 > --- a/drivers/media/dvb-frontends/dvb_dummy_fe.c > +++ b/drivers/media/dvb-frontends/dvb_dummy_fe.c > @@ -121,16 +121,13 @@ struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void) > > /* allocate memory for the internal state */ > state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); > - if (state == NULL) goto error; > + if (state == NULL) > + return NULL; I know that is not the scope here but, what do you think to change if (state == NULL) for if (!state) ? maybe you can send another patch for simplify these. Just my 2 cents :) > /* create dvb_frontend */ > memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops)); > state->frontend.demodulator_priv = state; > return &state->frontend; > - > -error: > - kfree(state); > - return NULL; > } > > static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops; > @@ -141,16 +138,13 @@ struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void) > > /* allocate memory for the internal state */ > state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); > - if (state == NULL) goto error; > + if (state == NULL) > + return NULL; > > /* create dvb_frontend */ > memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops)); > state->frontend.demodulator_priv = state; > return &state->frontend; > - > -error: > - kfree(state); > - return NULL; > } > > static struct dvb_frontend_ops dvb_dummy_fe_qam_ops; > @@ -161,16 +155,13 @@ struct dvb_frontend *dvb_dummy_fe_qam_attach(void) > > /* allocate memory for the internal state */ > state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); > - if (state == NULL) goto error; > + if (state == NULL) > + return NULL; > > /* create dvb_frontend */ > memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops)); > state->frontend.demodulator_priv = state; > return &state->frontend; > - > -error: > - kfree(state); > - return NULL; > } > > static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = { > diff --git a/drivers/media/dvb-frontends/lg2160.c b/drivers/media/dvb-frontends/lg2160.c > index cc11260..748da5d 100644 > --- a/drivers/media/dvb-frontends/lg2160.c > +++ b/drivers/media/dvb-frontends/lg2160.c > @@ -1451,7 +1451,6 @@ struct dvb_frontend *lg2160_attach(const struct lg2160_config *config, > return &state->frontend; > fail: > lg_warn("unable to detect LG216x hardware\n"); > - kfree(state); > return NULL; > } > EXPORT_SYMBOL(lg2160_attach); > diff --git a/drivers/media/dvb-frontends/s5h1432.c b/drivers/media/dvb-frontends/s5h1432.c > index 8352ce1..24a8c75 100644 > --- a/drivers/media/dvb-frontends/s5h1432.c > +++ b/drivers/media/dvb-frontends/s5h1432.c > @@ -352,7 +352,7 @@ struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config, > /* allocate memory for the internal state */ > state = kmalloc(sizeof(struct s5h1432_state), GFP_KERNEL); > if (state == NULL) > - goto error; > + return NULL; > > /* setup the state */ > state->config = config; > @@ -367,10 +367,6 @@ struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config, > state->frontend.demodulator_priv = state; > > return &state->frontend; > - > -error: > - kfree(state); > - return NULL; > } > EXPORT_SYMBOL(s5h1432_attach); > > diff --git a/drivers/media/dvb-frontends/s921.c b/drivers/media/dvb-frontends/s921.c > index cd2288c..5766512 100644 > --- a/drivers/media/dvb-frontends/s921.c > +++ b/drivers/media/dvb-frontends/s921.c > @@ -489,7 +489,7 @@ struct dvb_frontend *s921_attach(const struct s921_config *config, > dprintk("\n"); > if (state == NULL) { > rc("Unable to kzalloc\n"); > - goto rcor; > + return NULL; > } > > /* setup the state */ > @@ -502,11 +502,6 @@ struct dvb_frontend *s921_attach(const struct s921_config *config, > state->frontend.demodulator_priv = state; > > return &state->frontend; > - > -rcor: > - kfree(state); > - > - return NULL; > } > EXPORT_SYMBOL(s921_attach); > > diff --git a/drivers/media/dvb-frontends/stb6100.c b/drivers/media/dvb-frontends/stb6100.c > index 2e93e65..1147e61 100644 > --- a/drivers/media/dvb-frontends/stb6100.c > +++ b/drivers/media/dvb-frontends/stb6100.c > @@ -576,7 +576,7 @@ struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe, > > state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL); > if (state == NULL) > - goto error; > + return NULL; > > state->config = config; > state->i2c = i2c; > @@ -587,10 +587,6 @@ struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe, > > printk("%s: Attaching STB6100 \n", __func__); > return fe; > - > -error: > - kfree(state); > - return NULL; > } > > static int stb6100_release(struct dvb_frontend *fe) > diff --git a/drivers/media/dvb-frontends/tda665x.c b/drivers/media/dvb-frontends/tda665x.c > index 2c1c759..58ba534 100644 > --- a/drivers/media/dvb-frontends/tda665x.c > +++ b/drivers/media/dvb-frontends/tda665x.c > @@ -229,7 +229,7 @@ struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, > > state = kzalloc(sizeof(struct tda665x_state), GFP_KERNEL); > if (state == NULL) > - goto exit; > + return NULL; > > state->config = config; > state->i2c = i2c; > @@ -246,10 +246,6 @@ struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, > printk(KERN_DEBUG "%s: Attaching TDA665x (%s) tuner\n", __func__, info->name); > > return fe; > - > -exit: > - kfree(state); > - return NULL; > } > EXPORT_SYMBOL(tda665x_attach); > > diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c > index c4a82a1..1125a87 100644 > --- a/drivers/media/platform/davinci/vpbe.c > +++ b/drivers/media/platform/davinci/vpbe.c > @@ -771,7 +771,6 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev) > return 0; > > vpbe_fail_amp_register: > - kfree(vpbe_dev->amp); > vpbe_fail_sd_register: > kfree(vpbe_dev->encoders); > vpbe_fail_v4l2_device: > diff --git a/drivers/media/tuners/mt2063.c b/drivers/media/tuners/mt2063.c > index 0ed9091..1a91215 100644 > --- a/drivers/media/tuners/mt2063.c > +++ b/drivers/media/tuners/mt2063.c > @@ -2250,7 +2250,7 @@ struct dvb_frontend *mt2063_attach(struct dvb_frontend *fe, > > state = kzalloc(sizeof(struct mt2063_state), GFP_KERNEL); > if (state == NULL) > - goto error; > + return NULL; > > state->config = config; > state->i2c = i2c; > @@ -2261,10 +2261,6 @@ struct dvb_frontend *mt2063_attach(struct dvb_frontend *fe, > > printk(KERN_INFO "%s: Attaching MT2063\n", __func__); > return fe; > - > -error: > - kfree(state); > - return NULL; > } > EXPORT_SYMBOL_GPL(mt2063_attach); > > > -- > To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Att, Marcos Paulo de Souza Acadêmico de Ciencia da Computação - FURB - SC "Uma vida sem desafios é uma vida sem razão" "A life without challenges, is a non reason life" -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
