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> Cc: Mike Isely <is...@pobox.com> Signed-off-by: Peter Senna Tschudin <peter.se...@gmail.com> Signed-off-by: Ezequiel Garcia <elezegar...@gmail.com> --- drivers/media/usb/pvrusb2/pvrusb2-encoder.c | 3 +-- drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c | 4 ++-- drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | 2 +- 3 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/media/usb/pvrusb2/pvrusb2-encoder.c b/drivers/media/usb/pvrusb2/pvrusb2-encoder.c index e046fda..f7702ae 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-encoder.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-encoder.c @@ -422,8 +422,7 @@ int pvr2_encoder_adjust(struct pvr2_hdw *hdw) pvr2_trace(PVR2_TRACE_ERROR_LEGS, "Error from cx2341x module code=%d",ret); } else { - memcpy(&hdw->enc_cur_state,&hdw->enc_ctl_state, - sizeof(struct cx2341x_mpeg_params)); + hdw->enc_cur_state = hdw->enc_ctl_state; hdw->enc_cur_valid = !0; } return ret; diff --git a/drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c b/drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c index 885ce11..9691156 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c @@ -649,8 +649,8 @@ void pvr2_i2c_core_init(struct pvr2_hdw *hdw) } // Configure the adapter and set up everything else related to it. - memcpy(&hdw->i2c_adap,&pvr2_i2c_adap_template,sizeof(hdw->i2c_adap)); - memcpy(&hdw->i2c_algo,&pvr2_i2c_algo_template,sizeof(hdw->i2c_algo)); + hdw->i2c_adap = pvr2_i2c_adap_template; + hdw->i2c_algo = pvr2_i2c_algo_template; strlcpy(hdw->i2c_adap.name,hdw->name,sizeof(hdw->i2c_adap.name)); hdw->i2c_adap.dev.parent = &hdw->usb_dev->dev; hdw->i2c_adap.algo = &hdw->i2c_algo; diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c index db249ca..5b622ec 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c @@ -1339,7 +1339,7 @@ static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip, return; } - memcpy(&dip->devbase,&vdev_template,sizeof(vdev_template)); + dip->devbase = vdev_template; dip->devbase.release = pvr2_video_device_release; dip->devbase.ioctl_ops = &pvr2_ioctl_ops; { -- 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
