From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
Rather that using shell parsing of each file when looking for a device
node, use a combination of grep and sed to identify the device.
This is a remarkable speed optimisation for this code segment.
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
---
scripts/vin-tests.sh | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/scripts/vin-tests.sh b/scripts/vin-tests.sh
index 7c81aa51c1c5..2e6214bc95e6 100644
--- a/scripts/vin-tests.sh
+++ b/scripts/vin-tests.sh
@@ -99,17 +99,9 @@ mc_get_mdev() {
}
mc_get_dev() {
- name=$1
- mdev=$(mc_get_mdev)
-
- for dev in /sys/class/video4linux/*; do
- if [[ "$(cat $dev/name)" == "$name" ]]; then
- basename $dev
- return 0
- fi
- done
-
- error "Can't find device"
+ name="$1"
+ grep -l "$name" /sys/class/video4linux/video*/name | \
+ sed 's#.*video4linux\(.*\)/name#/dev\1#g'
}
mc_log() {
--
2.7.4
