| Message ID | 1351022246-8201-8-git-send-email-elezegarcia@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, 2012-10-23 at 16:57 -0300, Ezequiel Garcia wrote: > This kind of memcpy() is error-prone. Its replacement with a struct > assignment is prefered because it's type-safe and much easier to read. > > Found by coccinelle. Hand patched and reviewed. > Tested by compilation only. > > A simplified version of the semantic match that finds this problem is as > follows: (http://coccinelle.lip6.fr/) > > // <smpl> > @@ > identifier struct_name; > struct struct_name to; > struct struct_name from; > expression E; > @@ > -memcpy(&(to), &(from), E); > +to = from; > // </smpl> > This patch is fine. Signed-off-by: Andy Walls <awalls@md.metrocast.net> > Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> > Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> > --- > drivers/media/i2c/cx25840/cx25840-ir.c | 6 ++---- > 1 files changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/i2c/cx25840/cx25840-ir.c b/drivers/media/i2c/cx25840/cx25840-ir.c > index 38ce76e..9ae977b 100644 > --- a/drivers/media/i2c/cx25840/cx25840-ir.c > +++ b/drivers/media/i2c/cx25840/cx25840-ir.c > @@ -1251,13 +1251,11 @@ int cx25840_ir_probe(struct v4l2_subdev *sd) > cx25840_write4(ir_state->c, CX25840_IR_IRQEN_REG, 0); > > mutex_init(&ir_state->rx_params_lock); > - memcpy(&default_params, &default_rx_params, > - sizeof(struct v4l2_subdev_ir_parameters)); > + default_params = default_rx_params; > v4l2_subdev_call(sd, ir, rx_s_parameters, &default_params); > > mutex_init(&ir_state->tx_params_lock); > - memcpy(&default_params, &default_tx_params, > - sizeof(struct v4l2_subdev_ir_parameters)); > + default_params = default_tx_params; > v4l2_subdev_call(sd, ir, tx_s_parameters, &default_params); > > return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/i2c/cx25840/cx25840-ir.c b/drivers/media/i2c/cx25840/cx25840-ir.c index 38ce76e..9ae977b 100644 --- a/drivers/media/i2c/cx25840/cx25840-ir.c +++ b/drivers/media/i2c/cx25840/cx25840-ir.c @@ -1251,13 +1251,11 @@ int cx25840_ir_probe(struct v4l2_subdev *sd) cx25840_write4(ir_state->c, CX25840_IR_IRQEN_REG, 0); mutex_init(&ir_state->rx_params_lock); - memcpy(&default_params, &default_rx_params, - sizeof(struct v4l2_subdev_ir_parameters)); + default_params = default_rx_params; v4l2_subdev_call(sd, ir, rx_s_parameters, &default_params); mutex_init(&ir_state->tx_params_lock); - memcpy(&default_params, &default_tx_params, - sizeof(struct v4l2_subdev_ir_parameters)); + default_params = default_tx_params; v4l2_subdev_call(sd, ir, tx_s_parameters, &default_params); return 0;