[PATCH 2/2] staging: vc04_services: bcm2835-camera: avoid -Wformat-truncation

[Masaharu Noguchi]

    - Fix -Wformat-truncation in vidioc_querycap() when composing bus_info.
    - Use scnprintf() for the prefix and strscpy() for the remainder.

Signed-off-by: Masaharu Noguchi <nogunix at gmail.com>
---
 .../staging/vc04_services/bcm2835-camera/bcm2835-camera.c    | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
index fa7ea4ca4c36..c2788659af12 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -874,13 +874,14 @@ static int vidioc_querycap(struct file *file, void *priv,
 	struct bcm2835_mmal_dev *dev = video_drvdata(file);
 	u32 major;
 	u32 minor;
+	int n;
 
 	vchiq_mmal_version(dev->instance, &major, &minor);
 
 	strscpy(cap->driver, "bcm2835 mmal", sizeof(cap->driver));
 	snprintf((char *)cap->card, sizeof(cap->card), "mmal service %d.%d", major, minor);
-
-	snprintf((char *)cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev->v4l2_dev.name);
+	n = scnprintf((char *)cap->bus_info, sizeof(cap->bus_info), "platform:");
+	strscpy((char *)cap->bus_info + n, dev->v4l2_dev.name, sizeof(cap->bus_info) - n);
 	return 0;
 }
 
-- 
2.39.5