[PATCH 08/23] cx25840: Replace memcpy with struct assignment
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 Signed-off-by: Peter Senna Tschudin peter.se...@gmail.com Signed-off-by: Ezequiel Garcia elezegar...@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; -- 1.7.4.4 -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 08/23] cx25840: Replace memcpy with struct assignment
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 awa...@md.metrocast.net Signed-off-by: Peter Senna Tschudin peter.se...@gmail.com Signed-off-by: Ezequiel Garcia elezegar...@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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
